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Chen Y, Ding L, Zhang ZW, Wu XH, Que YT, Ma YR, Liu YY, Wen ZQ, Yang XY, Lu BL, Bao Y, Niu SQ, Yu SP. Role of dynamic contrast-enhanced MRI in predicting severe acute radiation-induced rectal injury in patients with rectal cancer. Eur Radiol 2024; 34:1471-1480. [PMID: 37665390 DOI: 10.1007/s00330-023-10194-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 05/21/2023] [Accepted: 07/07/2023] [Indexed: 09/05/2023]
Abstract
OBJECTIVES To explore the potential of dynamic contrast-enhanced MRI (DCE-MRI) quantitative parameters in predicting severe acute radiation-induced rectal injury (RRI) in rectal cancer. METHODS This retrospective study enrolled 49 patients with rectal cancer who underwent neoadjuvant chemoradiotherapy and rectal MRI including a DCE-MRI sequence from November 2014 to March 2021. Two radiologists independently measured DCE-MRI quantitative parameters, including the forward volume transfer constant (Ktrans), rate constant (kep), fractional extravascular extracellular space volume (ve), and the thickness of the rectal wall farthest away from the tumor. These parameters were compared between mild and severe acute RRI groups based on histopathological assessment. Receiver operating characteristic curve analysis was performed to analyze statistically significant parameters. RESULTS Forty-nine patients (mean age, 54 years ± 12 [standard deviation]; 37 men) were enrolled, including 25 patients with severe acute RRI. Ktrans was lower in severe acute RRI group than mild acute RRI group (0.032 min-1 vs 0.054 min-1; p = 0.008), but difference of other parameters (kep, ve and rectal wall thickness) was not significant between these two groups (all p > 0.05). The area under the receiver operating characteristic curve of Ktrans was 0.72 (95% confidence interval: 0.57, 0.84). With a Ktrans cutoff value of 0.047 min-1, the sensitivity and specificity for severe acute RRI prediction were 80% and 54%, respectively. CONCLUSION Ktrans demonstrated moderate diagnostic performance in predicting severe acute RRI. CLINICAL RELEVANCE STATEMENT Dynamic contrast-enhanced MRI can provide non-invasive and objective evidence for perioperative management and treatment strategies in rectal cancer patients with acute radiation-induced rectal injury. KEY POINTS • To our knowledge, this study is the first to evaluate the predictive value of contrast-enhanced MRI (DCE-MRI) quantitative parameters for severe acute radiation-induced rectal injury (RRI) in patients with rectal cancer. • Forward volume transfer constant (Ktrans), derived from DCE-MRI, exhibited moderate diagnostic performance (AUC = 0.72) in predicting severe acute RRI of rectal cancer, with a sensitivity of 80% and specificity of 54%. • DCE-MRI is a promising imaging marker for distinguishing the severity of acute RRI in patients with rectal cancer.
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Affiliation(s)
- Yan Chen
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Li Ding
- Department of Pathology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Zhi-Wen Zhang
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Xue-Han Wu
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, China
- Department of Radiology, The Seventh Affiliated Hospital, Sun Yat-Sen University, Shenzhen, 518017, China
| | - Yu-Tao Que
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, China
- Department of Radiology, The Seventh Affiliated Hospital, Sun Yat-Sen University, Shenzhen, 518017, China
| | - Yu-Ru Ma
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Yi-Yan Liu
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Zi-Qiang Wen
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Xin-Yue Yang
- Department of Radiology, Zhujiang Hospital, Southern Medical University, Guangzhou, 510280, China
| | - Bao-Lan Lu
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Yong Bao
- Department of Radiotherapy, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Shao-Qing Niu
- Department of Radiotherapy, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, China.
| | - Shen-Ping Yu
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, China.
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Que YT, Chen Y, Yang XY, Ma YR, Liu YY, Wen ZQ, Lu BL, Wu XH, Zhang ZW, Wu YZ, Yu SP, Yuan JP. MRI-detected tumor deposits in cT3 and cT4 rectal cancer following neoadjuvant chemoradiotherapy. Eur Radiol 2023:10.1007/s00330-023-10261-7. [PMID: 37840101 DOI: 10.1007/s00330-023-10261-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 07/06/2023] [Accepted: 07/23/2023] [Indexed: 10/17/2023]
Abstract
OBJECTIVES To evaluate the identification of tumor deposits (TDs) and the prognostic significance of an MRI tumor regression grade for TDs in patients with rectal cancer treated with neoadjuvant chemoradiotherapy (nCRT). METHODS Ninety-one patients with cT3 or cT4 rectal cancer who underwent surgery following nCRT between August 2014 and June 2020 were retrospectively analyzed. Changes in pre-nCRT MRI-detected TDs (mrTDs) were described as mrTD regression grade. The diagnostic performance of post-nCRT MRI-detected TDs (ymrTDs) was compared with histopathological reference standard. The correlation between ymrTDs, mrTD regression grade, and disease-free survival (DFS) was assessed. RESULTS The sensitivity and specificity of ymrTDs were 88.00% and 89.39%, respectively. The area under the receiver operating characteristic curve was 0.887 (95% confidence interval [CI]: 0.803-0.944). The 3-year DFS of patients with positive ymrTDs was significantly lower than of the negative group (44.83% vs 82.73%, p < 0.001). The 3-year DFS was 33.33% for patients with poor regression of mrTDs following nCRT and 55.56% for those with moderate regression, compared to 69.23% in good responders and 83.97% in patients without mrTDs (p < 0.001). On multivariable Cox regression, mrTD regression grade was the only independent MRI factor associated with DFS (p = 0.042). CONCLUSIONS Diagnostic performance of ymrTDs was moderate. The mrTD regression grade was independently correlated with DFS, which may have a prognostic implication for treatment and follow-up. CLINICAL RELEVANCE STATEMENT Patients with poor regression of MRI-detected tumor deposits may benefit from more aggressive treatments, such as chemoradiation therapy plus induction or consolidation chemotherapy. KEY POINTS • MRI provides a preoperative and noninvasive way to visualize tumor deposits (TDs) after neoadjuvant chemoradiotherapy (nCRT). • Post-nCRT MRI-detected TDs are a poor prognostic marker in cT3 and cT4 rectal cancer patients. • The regression of MRI-detected TDs after nCRT is associated with an improved disease-free survival.
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Affiliation(s)
- Yu-Tao Que
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Yuexiu District, No. 58, Zhongshan Second Road, Guangzhou, 510080, China
- Department of Radiology, The Seventh Affiliated Hospital, Sun Yat-Sen University, Guangming District, No. 628, Zhenyuan Road, Shenzhen, 518107, China
| | - Yan Chen
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Yuexiu District, No. 58, Zhongshan Second Road, Guangzhou, 510080, China
| | - Xin-Yue Yang
- Department of Radiology, Zhujiang Hospital, Southern Medical University, Guangzhou, 510280, China
| | - Yu-Ru Ma
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Yuexiu District, No. 58, Zhongshan Second Road, Guangzhou, 510080, China
| | - Yi-Yan Liu
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Yuexiu District, No. 58, Zhongshan Second Road, Guangzhou, 510080, China
| | - Zi-Qiang Wen
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Yuexiu District, No. 58, Zhongshan Second Road, Guangzhou, 510080, China
| | - Bao-Lan Lu
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Yuexiu District, No. 58, Zhongshan Second Road, Guangzhou, 510080, China
| | - Xue-Han Wu
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Yuexiu District, No. 58, Zhongshan Second Road, Guangzhou, 510080, China
- Department of Radiology, The Seventh Affiliated Hospital, Sun Yat-Sen University, Guangming District, No. 628, Zhenyuan Road, Shenzhen, 518107, China
| | - Zhi-Wen Zhang
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Yuexiu District, No. 58, Zhongshan Second Road, Guangzhou, 510080, China
| | - Yun-Zhu Wu
- MR Scientific Marketing, SIEMENS Healthineers Ltd, Shanghai, 210031, China
| | - Shen-Ping Yu
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Yuexiu District, No. 58, Zhongshan Second Road, Guangzhou, 510080, China.
| | - Jian-Peng Yuan
- Department of Radiology, The Seventh Affiliated Hospital, Sun Yat-Sen University, Guangming District, No. 628, Zhenyuan Road, Shenzhen, 518107, China.
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Allen KD, Huffman K, Cleveland RJ, van der Esch M, Abbott JH, Abbott A, Bennell K, Bowden JL, Eyles J, Healey EL, Holden MA, Jayakumar P, Koenig K, Lo G, Losina E, Miller K, Østerås N, Pratt C, Quicke JG, Sharma S, Skou ST, Tveter AT, Woolf A, Yu SP, Hinman RS. Evaluating Osteoarthritis Management Programs: outcome domain recommendations from the OARSI Joint Effort Initiative. Osteoarthritis Cartilage 2023; 31:954-965. [PMID: 36893979 PMCID: PMC10565839 DOI: 10.1016/j.joca.2023.02.078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 02/03/2023] [Accepted: 02/19/2023] [Indexed: 03/11/2023]
Abstract
OBJECTIVE To develop sets of core and optional recommended domains for describing and evaluating Osteoarthritis Management Programs (OAMPs), with a focus on hip and knee Osteoarthritis (OA). DESIGN We conducted a 3-round modified Delphi survey involving an international group of researchers, health professionals, health administrators and people with OA. In Round 1, participants ranked the importance of 75 outcome and descriptive domains in five categories: patient impacts, implementation outcomes, and characteristics of the OAMP and its participants and clinicians. Domains ranked as "important" or "essential" by ≥80% of participants were retained, and participants could suggest additional domains. In Round 2, participants rated their level of agreement that each domain was essential for evaluating OAMPs: 0 = strongly disagree to 10 = strongly agree. A domain was retained if ≥80% rated it ≥6. In Round 3, participants rated remaining domains using same scale as in Round 2; a domain was recommended as "core" if ≥80% of participants rated it ≥9 and as "optional" if ≥80% rated it ≥7. RESULTS A total of 178 individuals from 26 countries participated; 85 completed all survey rounds. Only one domain, "ability to participate in daily activities", met criteria for a core domain; 25 domains met criteria for an optional recommendation: 8 Patient Impacts, 5 Implementation Outcomes, 5 Participant Characteristics, 3 OAMP Characteristics and 4 Clinician Characteristics. CONCLUSION The ability of patients with OA to participate in daily activities should be evaluated in all OAMPs. Teams evaluating OAMPs should consider including domains from the optional recommended set, with representation from all five categories and based on stakeholder priorities in their local context.
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Affiliation(s)
- K D Allen
- Department of Medicine & Thurston Arthritis Research Center, University of North Carolina at Chapel Hill, USA; Durham Department of Veterans Affairs Health Care System, USA.
| | - K Huffman
- Department of Medicine & Thurston Arthritis Research Center, University of North Carolina at Chapel Hill, USA.
| | - R J Cleveland
- Department of Medicine & Thurston Arthritis Research Center, University of North Carolina at Chapel Hill, USA.
| | - M van der Esch
- Faculty of Health, Amsterdam University of Applied Sciences, Reade, Center for Rehabilitation and Rheumatology, Amsterdam, the Netherlands.
| | - J H Abbott
- Centre for Musculoskeletal Outcomes Research, University of Otago Medical School, Dunedin, New Zealand.
| | - A Abbott
- Department of Health, Medicine and Caring Sciences, Unit of Physiotherapy, Linköping University, SE 581 83 Linköping, Sweden.
| | - K Bennell
- Centre for Health, Exercise and Sports Medicine, Department of Physiotherapy, University of Melbourne, Melbourne, Australia.
| | - J L Bowden
- Kolling Institute, Sydney Musculoskeletal Health, The University of Sydney, Sydney, NSW, Australia; Department of Rheumatology, Royal North Shore Hospital, Sydney, NSW, Australia.
| | - J Eyles
- Kolling Institute, Sydney Musculoskeletal Health, The University of Sydney, Sydney, NSW, Australia; Department of Rheumatology, Royal North Shore Hospital, Sydney, NSW, Australia.
| | - E L Healey
- School of Medicine, Primary Care Centre Versus Arthritis, Keele University, UK.
| | - M A Holden
- School of Medicine, Primary Care Centre Versus Arthritis, Keele University, UK.
| | - Prakash Jayakumar
- The Musculoskeletal Institute: Department of Surgery and Perioperative Care, Dell Medical School, University of Texas at Austin, Austin, TX, USA.
| | - K Koenig
- Department of Surgery and Perioperative Care, Dell Medical School, University of Texas at Austin, Austin, TX, USA.
| | - G Lo
- Section of Immunology, Allergy and Rheumatology, Department of Medicine, Baylor College of Medicine and Center of Innovations in Quality, Effectiveness and Safety, Michael E. DeBakey VA Medical Center, Houston, TX, USA.
| | - E Losina
- Orthopedic and Arthritis Center for Outcomes Research (OrACORe), Policy and Innovation EValuation in Orthopedic Treatments (PIVOT) Center, Department of Orthopedic Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.
| | - K Miller
- Department of Medicine, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI, USA.
| | - N Østerås
- Center for treatment of Rheumatic and Musculoskeletal Diseases (REMEDY), Diakonhjemmet Hospital, Oslo, Norway.
| | - C Pratt
- Physiotherapy Department, Royal North Shore Hospital, Sydney, NSW, Australia.
| | - J G Quicke
- Chartered Society of Physiotherapy, Chancery Exchange, London, UK; School of Medicine, Keele University, Keele, UK.
| | - S Sharma
- School of Health Sciences, Faculty of Medicine and Health, University of New South Wales, Sydney, Australia; Centre for Pain IMPACT, Neuroscience Research Australia, Sydney, Australia.
| | - S T Skou
- Research Unit for Musculoskeletal Function and Physiotherapy, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; The Research Unit PROgrez, Department of Physiotherapy and Occupational Therapy, Næstved-Slagelse-Ringsted Hospitals, Region Zealand, Slagelse, Denmark.
| | - A T Tveter
- Center for treatment of Rheumatic and Musculoskeletal Diseases (REMEDY), Diakonhjemmet Hospital, Oslo, Norway.
| | - A Woolf
- Bone and Joint Research Group, Royal Cornwall Hospital, Truro, UK.
| | - S P Yu
- Kolling Institute, Sydney Musculoskeletal Health, The University of Sydney, Sydney, NSW, Australia; Department of Rheumatology, Royal North Shore Hospital, Sydney, NSW, Australia.
| | - R S Hinman
- Centre for Health, Exercise and Sports Medicine, Department of Physiotherapy, University of Melbourne, Melbourne, Australia.
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Lu BL, Chen Y, Wen ZQ, Liu YY, Ma YR, Que YT, Zhang ZW, Wu XH, Yu SP. Quantitative assessment of the microstructure of the mesorectum with different prognostic statuses by intravoxel incoherent motion diffusion-weighed magnetic resonance imaging. BMC Gastroenterol 2022; 22:481. [PMID: 36418952 PMCID: PMC9685901 DOI: 10.1186/s12876-022-02555-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 10/26/2022] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND The mesorectum surrounding the rectum provides an ideal substrate for tumour spread. However, preoperative risk assessment is still an issue. This study aimed to investigate the microstructural features of mesorectum with different prognostic statuses by intravoxel incoherent motion diffusion-weighted imaging (IVIM DWI). METHODS Patients with pathologically proven rectal adenocarcinoma underwent routine high-resolution rectal magnetic resonance imaging (MRI) and IVIM DWI sequences were acquired. The MRI-detected circumferential resection margin (mrCRM) and extramural vascular invasion (mrEMVI) were evaluated. IVIM parameters of the mesorectum adjacent to (MAT) and distant from (MDT) the tumour were measured and compared between and within the prognostic factor groups. RESULTS The positive mrCRM (pMAT < 0.001; pMDT = 0.013) and mrEMVI (pMAT = 0.001; pMDT < 0.001) groups demonstrated higher D values in the MAT and MDT than the corresponding negative groups. Conversely, the positive mrCRM (p = 0.001) and mrEMVI (p < 0.001) groups both demonstrated lower f values in the MAT. Similarly, in the self-comparison between the MAT and MDT in the above subgroups, D showed a significant difference in all subgroups (p < 0.001 for all), and f showed a significant difference in the positive mrCRM (p = 0.001) and mrEMVI (p = 0.002) groups. Moreover, the MAT displayed a higher D* in the positive mrCRM (p = 0.014), negative mrCRM (p = 0.009) and negative mrEMVI groups (p < 0.001). CONCLUSION The microstructure of the mesorectum in patients with rectal cancer with poor prognostic status shows changes based on IVIM parameters. IVIM parameters might be promising imaging biomarkers for risk assessment of tumour spread in mesorectum preoperatively.
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Affiliation(s)
- Bao-Lan Lu
- grid.412615.50000 0004 1803 6239Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan Road 2nd, 510080 Guangzhou, People’s Republic of China
| | - Yan Chen
- grid.412615.50000 0004 1803 6239Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan Road 2nd, 510080 Guangzhou, People’s Republic of China
| | - Zi-Qiang Wen
- grid.412615.50000 0004 1803 6239Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan Road 2nd, 510080 Guangzhou, People’s Republic of China
| | - Yi-Yan Liu
- grid.412615.50000 0004 1803 6239Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan Road 2nd, 510080 Guangzhou, People’s Republic of China
| | - Yu-Ru Ma
- grid.412615.50000 0004 1803 6239Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan Road 2nd, 510080 Guangzhou, People’s Republic of China
| | - Yu-Tao Que
- grid.412615.50000 0004 1803 6239Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan Road 2nd, 510080 Guangzhou, People’s Republic of China
| | - Zhi-Wen Zhang
- grid.412615.50000 0004 1803 6239Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan Road 2nd, 510080 Guangzhou, People’s Republic of China
| | - Xue-Han Wu
- grid.412615.50000 0004 1803 6239Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan Road 2nd, 510080 Guangzhou, People’s Republic of China
| | - Shen-Ping Yu
- grid.412615.50000 0004 1803 6239Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan Road 2nd, 510080 Guangzhou, People’s Republic of China
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Shirpurkar C, Zang J, Yang KY, Carlson D, Yu SP, Lucas E, Pericherla SV, Yang J, Guidry M, Lukin D, Ahn GH, Lu J, Trask L, Aflatouni F, Vučković J, Papp SB, Delfyett PJ. Photonic crystal resonators for inverse-designed multi-dimensional optical interconnects. Opt Lett 2022; 47:3063-3066. [PMID: 35709050 DOI: 10.1364/ol.461272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 05/10/2022] [Indexed: 06/15/2023]
Abstract
We experimentally demonstrate a 400 Gbit/s optical communication link utilizing wavelength-division multiplexing and mode-division multiplexing for a total of 40 channels. This link utilizes a novel, to the best of our knowledge, 400 GHz frequency comb source based on a chip-scale photonic crystal resonator. Silicon-on-insulator photonic inverse-designed 4 × 4 mode-division multiplexer structures enable a fourfold increase in data capacity. We show less than -10 dBm of optical receiver power for error-free data transmission in 34 out of a total of 40 channels using a PRBS31 pattern.
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Wan YX, Fu BT, Xie HQ, Yu SP, Lei HB, Zhang FB, Zhang ZH, Qiao LL, Li GH, Zhao J, Zhao ZX, Yao JP, Cheng Y. Observation of rotational coherence in an excited state of CO . Opt Lett 2021; 46:3893-3896. [PMID: 34388768 DOI: 10.1364/ol.432315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 07/12/2021] [Indexed: 06/13/2023]
Abstract
The vacuum ultraviolet (VUV) radiation is generated in the strong-field-ionized CO molecules through 2+1 resonance excitation with two-color femtosecond laser pulses. When scanning the relative delay between two pump pulses, the rotational-resolved VUV radiations show periodic oscillations lasting as long as 500 ps. Fourier analysis reveals that these oscillations correspond to rotational beat frequencies of the A2Πi state of CO+, which is the result of multi-channel interference during the resonant excitation process. High resolution of Fourier transform spectra up to 0.067cm-1 allows us to obtain the fine energy levels of the A2Πi state. The theoretical calculation is in good agreement with the experimental observation. This work reveals the rotational coherence of the ionic excited state and shows the prospect of rotational coherence spectroscopy in measuring fine structures of molecular ions.
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Lu Y, Rong G, Yu SP, Sun Z, Duan X, Dong Z, Xia H, Zhan N, Jin C, Ji J, Duan H. Chinese military medical teams in the Ebola outbreak of Sierra Leone. J ROY ARMY MED CORPS 2016; 162:198-202. [PMID: 26744190 PMCID: PMC4893094 DOI: 10.1136/jramc-2015-000562] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Accepted: 11/25/2015] [Indexed: 11/04/2022]
Abstract
The 2014-2015 Ebola virus disease (EVD) epidemic in West Africa was the largest in history. The three most affected countries, Guinea, Liberia and Sierra Leone, have faced enormous challenges in controlling transmission and providing clinical care for patients with EVD. The Chinese government, in response to the requests of the WHO and the governments of the affected countries, responded rapidly by deploying Chinese military medical teams (CMMTs) to the areas struck by the deadly epidemic. A total of three CMMTs, comprising 115 military medical professionals, were rotationally deployed to Freetown, Sierra Leone to assist with infection prevention and control, clinical care and health promotion and training. Between 1 October 2014 and 22 March 2015, the CMMTs in Sierra Leone admitted and treated a total of 773 suspected and 285 confirmed EVD cases. Among the 285 confirmed cases, 146 (51.2%) patients survived after treatment. In addition, the CMMTs maintained the record of zero infections among healthcare workers and zero cross-infections between quarantined patients. In this manuscript, we aim to give an overview of the mission, and share our best practices experience on predeployment preparedness, EVD holding and treatment centre building and EVD case management.
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Affiliation(s)
- Yinying Lu
- The 302 Hospital of Chinese Army, Beijing, China
| | - G Rong
- The 302 Hospital of Chinese Army, Beijing, China
| | - S P Yu
- Health Services Center, Chinese Academy of Military Medical Sciences, Beijing, China
| | - Z Sun
- The 302 Hospital of Chinese Army, Beijing, China
| | - X Duan
- The 302 Hospital of Chinese Army, Beijing, China
| | - Z Dong
- The 302 Hospital of Chinese Army, Beijing, China
| | - H Xia
- The 302 Hospital of Chinese Army, Beijing, China
| | - N Zhan
- The 302 Hospital of Chinese Army, Beijing, China
| | - C Jin
- The 302 Hospital of Chinese Army, Beijing, China
| | - J Ji
- The 302 Hospital of Chinese Army, Beijing, China
| | - H Duan
- The 302 Hospital of Chinese Army, Beijing, China
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Song M, Chen D, Yu SP. The TRPC channel blocker SKF 96365 inhibits glioblastoma cell growth by enhancing reverse mode of the Na(+) /Ca(2+) exchanger and increasing intracellular Ca(2+). Br J Pharmacol 2015; 171:3432-47. [PMID: 24641279 DOI: 10.1111/bph.12691] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Revised: 02/26/2014] [Accepted: 03/11/2014] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND AND PURPOSE SKF 96365 is well known for its suppressing effect on human glioblastoma growth by inhibiting pre-activated transient receptor potential canonical (TRPC) channels and Ca(2+) influx. The effect of SKF 96363 on glioblastoma cells, however, may be multifaceted and this possibility has been largely ignored. EXPERIMENTAL APPROACH The effects of SKF 96365 on cell cycle and cell viability of cultured human glioblastoma cells were characterized. Western blot, Ca(2+) imaging and patch clamp recordings were used to delineate cell death mechanisms. siRNA gene knockdown provided additional evidence. KEY RESULTS SKF 96365 repressed glioblastoma cell growth via increasing intracellular Ca(2+) ([Ca(2+) ]i ) irrespective of whether TRPC channels were blocked or not. The effect of SKF 96365 primarily resulted from enhanced reverse operation of the Na(+) /Ca(2+) exchanger (NCX) with an EC50 of 9.79 μM. SKF 96365 arrested the glioblastoma cells in the S and G2 phases and activated p38-MAPK and JNK, which were all prevented by the Ca(2+) chelator BAPTA-AM or EGTA. The expression of NCX in glioblastoma cells was significantly higher than in normal human astrocytes. Knockdown of the NCX1 isoforms diminished the effect of SKF 96365 on glioblastoma cells. CONCLUSIONS AND IMPLICATIONS At the same concentration, SKF 96365 blocks TRPC channels and enhances the reverse mode of the NCX causing [Ca(2+) ]i accumulation and cytotoxicity. This finding suggests an alternative pharmacological mechanism of SKF 96365. It also indicates that modulation of the NCX is an effective method to disrupt Ca(2+) homeostasis and suppress human glioblastoma cells.
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Affiliation(s)
- M Song
- Department of Anesthesiology, Emory University School of Medicine, Atlanta, GA, USA
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Ablikim M, Achasov MN, Ai XC, Albayrak O, Albrecht M, Ambrose DJ, An FF, An Q, Bai JZ, Baldini Ferroli R, Ban Y, Bennett JV, Bertani M, Bian JM, Boger E, Bondarenko O, Boyko I, Braun S, Briere RA, Cai H, Cai X, Cakir O, Calcaterra A, Cao GF, Cetin SA, Chang JF, Chelkov G, Chen G, Chen HS, Chen JC, Chen ML, Chen SJ, Chen X, Chen XR, Chen YB, Cheng HP, Chu XK, Chu YP, Cronin-Hennessy D, Dai HL, Dai JP, Dedovich D, Deng ZY, Denig A, Denysenko I, Destefanis M, Ding WM, Ding Y, Dong C, Dong J, Dong LY, Dong MY, Du SX, Fan JZ, Fang J, Fang SS, Fang Y, Fava L, Feng CQ, Fu CD, Fuks O, Gao Q, Gao Y, Geng C, Goetzen K, Gong WX, Gradl W, Greco M, Gu MH, Gu YT, Guan YH, Guo AQ, Guo LB, Guo T, Guo YP, Han YL, Harris FA, He KL, He M, He ZY, Held T, Heng YK, Hou ZL, Hu C, Hu HM, Hu JF, Hu T, Huang GM, Huang GS, Huang HP, Huang JS, Huang L, Huang XT, Huang Y, Hussain T, Ji CS, Ji Q, Ji QP, Ji XB, Ji XL, Jiang LL, Jiang LW, Jiang XS, Jiao JB, Jiao Z, Jin DP, Jin S, Johansson T, Kalantar-Nayestanaki N, Kang XL, Kang XS, Kavatsyuk M, Kloss B, Kopf B, Kornicer M, Kuehn W, Kupsc A, Lai W, Lange JS, Lara M, Larin P, Leyhe M, Li CH, Li C, Li C, Li D, Li DM, Li F, Li G, Li HB, Li HJ, Li JC, Li K, Li K, Li L, Li PR, Li QJ, Li T, Li WD, Li WG, Li XL, Li XN, Li XQ, Li ZB, Liang H, Liang YF, Liang YT, Lin DX, Liu BJ, Liu CL, Liu CX, Liu FH, Liu F, Liu F, Liu HB, Liu HH, Liu HM, Liu J, Liu JP, Liu K, Liu KY, Liu PL, Liu Q, Liu SB, Liu X, Liu YB, Liu ZA, Liu Z, Liu Z, Loehner H, Lou XC, Lu GR, Lu HJ, Lu HL, Lu JG, Lu XR, Lu Y, Lu YP, Luo CL, Luo MX, Luo T, Luo XL, Lv M, Ma FC, Ma HL, Ma QM, Ma S, Ma T, Ma XY, Maas FE, Maggiora M, Malik QA, Mao YJ, Mao ZP, Messchendorp JG, Min J, Min TJ, Mitchell RE, Mo XH, Mo YJ, Moeini H, Morales Morales C, Moriya K, Muchnoi NY, Muramatsu H, Nefedov Y, Nikolaev IB, Ning Z, Nisar S, Niu XY, Olsen SL, Ouyang Q, Pacetti S, Pelizaeus M, Peng HP, Peters K, Ping JL, Ping RG, Poling R, Q N, Qi M, Qian S, Qiao CF, Qin LQ, Qin XS, Qin Y, Qin ZH, Qiu JF, Rashid KH, Redmer CF, Ripka M, Rong G, Ruan XD, Sarantsev A, Schoenning K, Schumann S, Shan W, Shao M, Shen CP, Shen XY, Sheng HY, Shepherd MR, Song WM, Song XY, Spataro S, Spruck B, Sun GX, Sun JF, Sun SS, Sun YJ, Sun YZ, Sun ZJ, Sun ZT, Tang CJ, Tang X, Tapan I, Thorndike EH, Toth D, Ullrich M, Uman I, Varner GS, Wang B, Wang D, Wang DY, Wang K, Wang LL, Wang LS, Wang M, Wang P, Wang PL, Wang QJ, Wang SG, Wang W, Wang XF, Wang YD, Wang YF, Wang YQ, Wang Z, Wang ZG, Wang ZH, Wang ZY, Wei DH, Wei JB, Weidenkaff P, Wen SP, Werner M, Wiedner U, Wolke M, Wu LH, Wu N, Wu Z, Xia LG, Xia Y, Xiao D, Xiao ZJ, Xie YG, Xiu QL, Xu GF, Xu L, Xu QJ, Xu QN, Xu XP, Xue Z, Yan L, Yan WB, Yan WC, Yan YH, Yang HX, Yang L, Yang Y, Yang YX, Ye H, Ye M, Ye MH, Yu BX, Yu CX, Yu HW, Yu JS, Yu SP, Yuan CZ, Yuan WL, Yuan Y, Zafar AA, Zallo A, Zang SL, Zeng Y, Zhang BX, Zhang BY, Zhang C, Zhang CB, Zhang CC, Zhang DH, Zhang HH, Zhang HY, Zhang JJ, Zhang JQ, Zhang JW, Zhang JY, Zhang JZ, Zhang SH, Zhang XJ, Zhang XY, Zhang Y, Zhang YH, Zhang ZH, Zhang ZP, Zhang ZY, Zhao G, Zhao JW, Zhao L, Zhao L, Zhao MG, Zhao Q, Zhao QW, Zhao SJ, Zhao TC, Zhao XH, Zhao YB, Zhao ZG, Zhemchugov A, Zheng B, Zheng JP, Zheng YH, Zhong B, Zhou L, Zhou L, Zhou X, Zhou XK, Zhou XR, Zhou XY, Zhu K, Zhu KJ, Zhu XL, Zhu YC, Zhu YS, Zhu ZA, Zhuang J, Zou BS, Zou JH. Observation of η'→π+ π π+ π- and η'→π+π- π0 π0. Phys Rev Lett 2014; 112:251801. [PMID: 25014804 DOI: 10.1103/physrevlett.112.251801] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Indexed: 06/03/2023]
Abstract
Using a sample of 1.3 × 10(9) J/ψ events collected with the BESIII detector, we report the first observation of η(')→π(+)π(-)π(+)π(-) and η(')→π(+)π(-)π(0)π(0). The measured branching fractions are B(η(')→π(+)π(-)π(+)π(-)) = [8.53 ± 0.69(stat.) ± 0.64(syst.)]×10(-5) and B(η(')→π(+)π(-)π(0) π(0)) = [1.82 ± 0.35(stat.) ± 0.18(syst.)] × 10(-4), which are consistent with theoretical predictions based on a combination of chiral perturbation theory and vector-meson dominance.
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Affiliation(s)
- M Ablikim
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M N Achasov
- G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia
| | - X C Ai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - O Albayrak
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - M Albrecht
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - D J Ambrose
- University of Rochester, Rochester, New York 14627, USA
| | - F F An
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q An
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - J Z Bai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | | | - Y Ban
- Peking University, Beijing 100871, People's Republic of China
| | - J V Bennett
- Indiana University, Bloomington, Indiana 47405, USA
| | - M Bertani
- INFN Laboratori Nazionali di Frascati, I-00044 Frascati, Italy
| | - J M Bian
- University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - E Boger
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - O Bondarenko
- KVI, University of Groningen, NL-9747 AA Groningen, Netherlands
| | - I Boyko
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - S Braun
- Universitaet Giessen, D-35392 Giessen, Germany
| | - R A Briere
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - H Cai
- Wuhan University, Wuhan 430072, People's Republic of China
| | - X Cai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - O Cakir
- Ankara University, Dogol Caddesi, 06100 Tandogan, Ankara, Turkey
| | - A Calcaterra
- INFN Laboratori Nazionali di Frascati, I-00044 Frascati, Italy
| | - G F Cao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S A Cetin
- Dogus University, 34722 Istanbul, Turkey
| | - J F Chang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G Chelkov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - G Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H S Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J C Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M L Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S J Chen
- Nanjing University, Nanjing 210093, People's Republic of China
| | - X Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X R Chen
- Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Y B Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H P Cheng
- Huangshan College, Huangshan 245000, People's Republic of China
| | - X K Chu
- Peking University, Beijing 100871, People's Republic of China
| | - Y P Chu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | | | - H L Dai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J P Dai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - D Dedovich
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - Z Y Deng
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - A Denig
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - I Denysenko
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - M Destefanis
- University of Turin, I-10125 Turin, Italy and INFN, I-10125 Turin, Italy
| | - W M Ding
- Shandong University, Jinan 250100, People's Republic of China
| | - Y Ding
- Liaoning University, Shenyang 110036, People's Republic of China
| | - C Dong
- Nankai University, Tianjin 300071, People's Republic of China
| | - J Dong
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L Y Dong
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Y Dong
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S X Du
- Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - J Z Fan
- Tsinghua University, Beijing 100084, People's Republic of China
| | - J Fang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S S Fang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y Fang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L Fava
- University of Eastern Piedmont, I-15121 Alessandria, Italy and INFN, I-10125 Turin, Italy
| | - C Q Feng
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - C D Fu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - O Fuks
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - Q Gao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y Gao
- Tsinghua University, Beijing 100084, People's Republic of China
| | - C Geng
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - K Goetzen
- GSI Helmholtzcentre for Heavy Ion Research GmbH, D-64291 Darmstadt, Germany
| | - W X Gong
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - W Gradl
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - M Greco
- University of Turin, I-10125 Turin, Italy and INFN, I-10125 Turin, Italy
| | - M H Gu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y T Gu
- GuangXi University, Nanning 530004, People's Republic of China
| | - Y H Guan
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - A Q Guo
- Nankai University, Tianjin 300071, People's Republic of China
| | - L B Guo
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - T Guo
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - Y P Guo
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - Y L Han
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - F A Harris
- University of Hawaii, Honolulu, Hawaii 96822, USA
| | - K L He
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M He
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z Y He
- Nankai University, Tianjin 300071, People's Republic of China
| | - T Held
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - Y K Heng
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z L Hou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C Hu
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - H M Hu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J F Hu
- Universitaet Giessen, D-35392 Giessen, Germany
| | - T Hu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G M Huang
- Central China Normal University, Wuhan 430079, People's Republic of China
| | - G S Huang
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - H P Huang
- Wuhan University, Wuhan 430072, People's Republic of China
| | - J S Huang
- Henan Normal University, Xinxiang 453007, People's Republic of China
| | - L Huang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X T Huang
- Shandong University, Jinan 250100, People's Republic of China
| | - Y Huang
- Nanjing University, Nanjing 210093, People's Republic of China
| | - T Hussain
- University of the Punjab, Lahore 54590, Pakistan
| | - C S Ji
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Q Ji
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q P Ji
- Nankai University, Tianjin 300071, People's Republic of China
| | - X B Ji
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X L Ji
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L L Jiang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L W Jiang
- Wuhan University, Wuhan 430072, People's Republic of China
| | - X S Jiang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J B Jiao
- Shandong University, Jinan 250100, People's Republic of China
| | - Z Jiao
- Huangshan College, Huangshan 245000, People's Republic of China
| | - D P Jin
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S Jin
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - T Johansson
- Uppsala University, Box 516, SE-75120 Uppsala, Sweden
| | | | - X L Kang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X S Kang
- Nankai University, Tianjin 300071, People's Republic of China
| | - M Kavatsyuk
- KVI, University of Groningen, NL-9747 AA Groningen, Netherlands
| | - B Kloss
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - B Kopf
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - M Kornicer
- University of Hawaii, Honolulu, Hawaii 96822, USA
| | - W Kuehn
- Universitaet Giessen, D-35392 Giessen, Germany
| | - A Kupsc
- Uppsala University, Box 516, SE-75120 Uppsala, Sweden
| | - W Lai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J S Lange
- Universitaet Giessen, D-35392 Giessen, Germany
| | - M Lara
- Indiana University, Bloomington, Indiana 47405, USA
| | - P Larin
- Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - M Leyhe
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - C H Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Cheng Li
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Cui Li
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - D Li
- Hunan University, Changsha 410082, People's Republic of China
| | - D M Li
- Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - F Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H B Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H J Li
- Henan Normal University, Xinxiang 453007, People's Republic of China
| | - J C Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - K Li
- Hangzhou Normal University, Hangzhou 310036, People's Republic of China
| | - K Li
- Shandong University, Jinan 250100, People's Republic of China
| | - Lei Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - P R Li
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Q J Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - T Li
- Shandong University, Jinan 250100, People's Republic of China
| | - W D Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - W G Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X L Li
- Shandong University, Jinan 250100, People's Republic of China
| | - X N Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X Q Li
- Nankai University, Tianjin 300071, People's Republic of China
| | - Z B Li
- Sun Yat-Sen University, Guangzhou 510275, People's Republic of China
| | - H Liang
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Y F Liang
- Sichuan University, Chengdu 610064, People's Republic of China
| | - Y T Liang
- Universitaet Giessen, D-35392 Giessen, Germany
| | - D X Lin
- Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - B J Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C L Liu
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - C X Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - F H Liu
- Shanxi University, Taiyuan 030006, People's Republic of China
| | - Fang Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Feng Liu
- Central China Normal University, Wuhan 430079, People's Republic of China
| | - H B Liu
- GuangXi University, Nanning 530004, People's Republic of China
| | - H H Liu
- Henan University of Science and Technology, Luoyang 471003, People's Republic of China
| | - H M Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J P Liu
- Wuhan University, Wuhan 430072, People's Republic of China
| | - K Liu
- Tsinghua University, Beijing 100084, People's Republic of China
| | - K Y Liu
- Liaoning University, Shenyang 110036, People's Republic of China
| | - P L Liu
- Shandong University, Jinan 250100, People's Republic of China
| | - Q Liu
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - S B Liu
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - X Liu
- Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Y B Liu
- Nankai University, Tianjin 300071, People's Republic of China
| | - Z A Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Zhiqiang Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Zhiqing Liu
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - H Loehner
- KVI, University of Groningen, NL-9747 AA Groningen, Netherlands
| | - X C Lou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G R Lu
- Henan Normal University, Xinxiang 453007, People's Republic of China
| | - H J Lu
- Huangshan College, Huangshan 245000, People's Republic of China
| | - H L Lu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J G Lu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X R Lu
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Y Lu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y P Lu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C L Luo
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - M X Luo
- Zhejiang University, Hangzhou 310027, People's Republic of China
| | - T Luo
- University of Hawaii, Honolulu, Hawaii 96822, USA
| | - X L Luo
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Lv
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - F C Ma
- Liaoning University, Shenyang 110036, People's Republic of China
| | - H L Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q M Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - T Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X Y Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - F E Maas
- Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - M Maggiora
- University of Turin, I-10125 Turin, Italy and INFN, I-10125 Turin, Italy
| | - Q A Malik
- University of the Punjab, Lahore 54590, Pakistan
| | - Y J Mao
- Peking University, Beijing 100871, People's Republic of China
| | - Z P Mao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | | | - J Min
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - T J Min
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - R E Mitchell
- Indiana University, Bloomington, Indiana 47405, USA
| | - X H Mo
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y J Mo
- Central China Normal University, Wuhan 430079, People's Republic of China
| | - H Moeini
- KVI, University of Groningen, NL-9747 AA Groningen, Netherlands
| | - C Morales Morales
- Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - K Moriya
- Indiana University, Bloomington, Indiana 47405, USA
| | - N Yu Muchnoi
- G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia
| | - H Muramatsu
- University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - Y Nefedov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - I B Nikolaev
- G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia
| | - Z Ning
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S Nisar
- COMSATS Institute of Information Technology, Lahore, Defence Road, Off Raiwind Road, Lahore 54000, Pakistan
| | - X Y Niu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S L Olsen
- Seoul National University, Seoul 151-747, Korea
| | - Q Ouyang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S Pacetti
- INFN and University of Perugia, I-06100 Perugia, Italy
| | - M Pelizaeus
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - H P Peng
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - K Peters
- GSI Helmholtzcentre for Heavy Ion Research GmbH, D-64291 Darmstadt, Germany
| | - J L Ping
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - R G Ping
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - R Poling
- University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - N Q
- Wuhan University, Wuhan 430072, People's Republic of China
| | - M Qi
- Nanjing University, Nanjing 210093, People's Republic of China
| | - S Qian
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C F Qiao
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - L Q Qin
- Shandong University, Jinan 250100, People's Republic of China
| | - X S Qin
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y Qin
- Peking University, Beijing 100871, People's Republic of China
| | - Z H Qin
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J F Qiu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - K H Rashid
- University of the Punjab, Lahore 54590, Pakistan
| | - C F Redmer
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - M Ripka
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - G Rong
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X D Ruan
- GuangXi University, Nanning 530004, People's Republic of China
| | - A Sarantsev
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - K Schoenning
- Uppsala University, Box 516, SE-75120 Uppsala, Sweden
| | - S Schumann
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - W Shan
- Peking University, Beijing 100871, People's Republic of China
| | - M Shao
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - C P Shen
- Beihang University, Beijing 100191, People's Republic of China
| | - X Y Shen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H Y Sheng
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M R Shepherd
- Indiana University, Bloomington, Indiana 47405, USA
| | - W M Song
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X Y Song
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S Spataro
- University of Turin, I-10125 Turin, Italy and INFN, I-10125 Turin, Italy
| | - B Spruck
- Universitaet Giessen, D-35392 Giessen, Germany
| | - G X Sun
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J F Sun
- Henan Normal University, Xinxiang 453007, People's Republic of China
| | - S S Sun
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y J Sun
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Y Z Sun
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z J Sun
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z T Sun
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - C J Tang
- Sichuan University, Chengdu 610064, People's Republic of China
| | - X Tang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - I Tapan
- Uludag University, 16059 Bursa, Turkey
| | - E H Thorndike
- University of Rochester, Rochester, New York 14627, USA
| | - D Toth
- University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - M Ullrich
- Universitaet Giessen, D-35392 Giessen, Germany
| | - I Uman
- Dogus University, 34722 Istanbul, Turkey
| | - G S Varner
- University of Hawaii, Honolulu, Hawaii 96822, USA
| | - B Wang
- Nankai University, Tianjin 300071, People's Republic of China
| | - D Wang
- Peking University, Beijing 100871, People's Republic of China
| | - D Y Wang
- Peking University, Beijing 100871, People's Republic of China
| | - K Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L L Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L S Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Wang
- Shandong University, Jinan 250100, People's Republic of China
| | - P Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - P L Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q J Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S G Wang
- Peking University, Beijing 100871, People's Republic of China
| | - W Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X F Wang
- Tsinghua University, Beijing 100084, People's Republic of China
| | - Y D Wang
- INFN Laboratori Nazionali di Frascati, I-00044 Frascati, Italy
| | - Y F Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y Q Wang
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - Z Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z G Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z H Wang
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Z Y Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - D H Wei
- Guangxi Normal University, Guilin 541004, People's Republic of China
| | - J B Wei
- Peking University, Beijing 100871, People's Republic of China
| | - P Weidenkaff
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - S P Wen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Werner
- Universitaet Giessen, D-35392 Giessen, Germany
| | - U Wiedner
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - M Wolke
- Uppsala University, Box 516, SE-75120 Uppsala, Sweden
| | - L H Wu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - N Wu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z Wu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L G Xia
- Tsinghua University, Beijing 100084, People's Republic of China
| | - Y Xia
- Hunan University, Changsha 410082, People's Republic of China
| | - D Xiao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z J Xiao
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - Y G Xie
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q L Xiu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G F Xu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L Xu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q J Xu
- Hangzhou Normal University, Hangzhou 310036, People's Republic of China
| | - Q N Xu
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - X P Xu
- Soochow University, Suzhou 215006, People's Republic of China
| | - Z Xue
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L Yan
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - W B Yan
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - W C Yan
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Y H Yan
- Hunan University, Changsha 410082, People's Republic of China
| | - H X Yang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L Yang
- Wuhan University, Wuhan 430072, People's Republic of China
| | - Y Yang
- Central China Normal University, Wuhan 430079, People's Republic of China
| | - Y X Yang
- Guangxi Normal University, Guilin 541004, People's Republic of China
| | - H Ye
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Ye
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M H Ye
- China Center of Advanced Science and Technology, Beijing 100190, People's Republic of China
| | - B X Yu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C X Yu
- Nankai University, Tianjin 300071, People's Republic of China
| | - H W Yu
- Peking University, Beijing 100871, People's Republic of China
| | - J S Yu
- Lanzhou University, Lanzhou 730000, People's Republic of China
| | - S P Yu
- Shandong University, Jinan 250100, People's Republic of China
| | - C Z Yuan
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - W L Yuan
- Nanjing University, Nanjing 210093, People's Republic of China
| | - Y Yuan
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - A A Zafar
- University of the Punjab, Lahore 54590, Pakistan
| | - A Zallo
- INFN Laboratori Nazionali di Frascati, I-00044 Frascati, Italy
| | - S L Zang
- Nanjing University, Nanjing 210093, People's Republic of China
| | - Y Zeng
- Hunan University, Changsha 410082, People's Republic of China
| | - B X Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - B Y Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C Zhang
- Nanjing University, Nanjing 210093, People's Republic of China
| | - C B Zhang
- Hunan University, Changsha 410082, People's Republic of China
| | - C C Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - D H Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H H Zhang
- Sun Yat-Sen University, Guangzhou 510275, People's Republic of China
| | - H Y Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J J Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J Q Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J W Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J Y Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J Z Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S H Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X J Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X Y Zhang
- Shandong University, Jinan 250100, People's Republic of China
| | - Y Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y H Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z H Zhang
- Central China Normal University, Wuhan 430079, People's Republic of China
| | - Z P Zhang
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Z Y Zhang
- Wuhan University, Wuhan 430072, People's Republic of China
| | - G Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J W Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Lei Zhao
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Ling Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M G Zhao
- Nankai University, Tianjin 300071, People's Republic of China
| | - Q Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q W Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S J Zhao
- Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - T C Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X H Zhao
- Nanjing University, Nanjing 210093, People's Republic of China
| | - Y B Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z G Zhao
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - A Zhemchugov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - B Zheng
- University of South China, Hengyang 421001, People's Republic of China
| | - J P Zheng
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y H Zheng
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - B Zhong
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - L Zhou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Li Zhou
- Nankai University, Tianjin 300071, People's Republic of China
| | - X Zhou
- Wuhan University, Wuhan 430072, People's Republic of China
| | - X K Zhou
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - X R Zhou
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - X Y Zhou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - K Zhu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - K J Zhu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X L Zhu
- Tsinghua University, Beijing 100084, People's Republic of China
| | - Y C Zhu
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Y S Zhu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z A Zhu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J Zhuang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - B S Zou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J H Zou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
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Ablikim M, Achasov MN, Albayrak O, Ambrose DJ, An FF, An Q, Bai JZ, Baldini Ferroli R, Ban Y, Becker J, Bennett JV, Bertani M, Bian JM, Boger E, Bondarenko O, Boyko I, Braun S, Briere RA, Bytev V, Cai H, Cai X, Cakir O, Calcaterra A, Cao GF, Cetin SA, Chang JF, Chelkov G, Chen G, Chen HS, Chen JC, Chen ML, Chen SJ, Chen XR, Chen YB, Cheng HP, Chu YP, Cronin-Hennessy D, Dai HL, Dai JP, Dedovich D, Deng ZY, Denig A, Denysenko I, Destefanis M, Ding WM, Ding Y, Dong LY, Dong MY, Du SX, Fang J, Fang SS, Fava L, Feng CQ, Friedel P, Fu CD, Fu JL, Fuks O, Gao Y, Geng C, Goetzen K, Gong WX, Gradl W, Greco M, Gu MH, Gu YT, Guan YH, Guo AQ, Guo LB, Guo T, Guo YP, Han YL, Harris FA, He KL, He M, He ZY, Held T, Heng YK, Hou ZL, Hu C, Hu HM, Hu JF, Hu T, Huang GM, Huang GS, Huang JS, Huang L, Huang XT, Huang Y, Hussain T, Ji CS, Ji Q, Ji QP, Ji XB, Ji XL, Jiang LL, Jiang XS, Jiao JB, Jiao Z, Jin DP, Jin S, Jing FF, Kalantar-Nayestanaki N, Kavatsyuk M, Kloss B, Kopf B, Kornicer M, Kuehn W, Lai W, Lange JS, Lara M, Larin P, Leyhe M, Li CH, Li C, Li C, Li DM, Li F, Li G, Li HB, Li JC, Li K, Li L, Li PR, Li QJ, Li WD, Li WG, Li XL, Li XN, Li XQ, Li XR, Li ZB, Liang H, Liang YF, Liang YT, Liao GR, Liao XT, Lin DX, Liu BJ, Liu CL, Liu CX, Liu FH, Liu F, Liu F, Liu H, Liu HB, Liu HH, Liu HM, Liu HW, Liu JP, Liu K, Liu KY, Liu LD, Liu PL, Liu Q, Liu SB, Liu X, Liu YB, Liu ZA, Liu Z, Liu Z, Loehner H, Lou XC, Lu GR, Lu HJ, Lu JG, Lu XR, Lu YP, Luo CL, Luo MX, Luo T, Luo XL, Lv M, Ma FC, Ma HL, Ma QM, Ma S, Ma T, Ma XY, Maas FE, Maggiora M, Malik QA, Mao YJ, Mao ZP, Messchendorp JG, Min J, Min TJ, Mitchell RE, Mo XH, Moeini H, Morales Morales C, Moriya K, Muchnoi NY, Muramatsu H, Nefedov Y, Nikolaev IB, Ning Z, Olsen SL, Ouyang Q, Pacetti S, Park JW, Pelizaeus M, Peng HP, Peters K, Ping JL, Ping RG, Poling R, Prencipe E, Qi M, Qian S, Qiao CF, Qin LQ, Qin XS, Qin Y, Qin ZH, Qiu JF, Rashid KH, Redmer CF, Rong G, Ruan XD, Sarantsev A, Shao M, Shen CP, Shen XY, Sheng HY, Shepherd MR, Song WM, Song XY, Spataro S, Spruck B, Sun DH, Sun GX, Sun JF, Sun SS, Sun YJ, Sun YZ, Sun ZJ, Sun ZT, Tang CJ, Tang X, Tapan I, Thorndike EH, Toth D, Ullrich M, Uman I, Varner GS, Wang B, Wang D, Wang DY, Wang K, Wang LL, Wang LS, Wang M, Wang P, Wang PL, Wang QJ, Wang SG, Wang XF, Wang XL, Wang YD, Wang YF, Wang YQ, Wang Z, Wang ZG, Wang ZY, Wei DH, Wei JB, Weidenkaff P, Wen QG, Wen SP, Werner M, Wiedner U, Wu LH, Wu N, Wu SX, Wu W, Wu Z, Xia LG, Xia YX, Xiao ZJ, Xie YG, Xiu QL, Xu GF, Xu QJ, Xu QN, Xu XP, Xu ZR, Xue Z, Yan L, Yan WB, Yan YH, Yang HX, Yang Y, Yang YX, Ye H, Ye M, Ye MH, Yu BX, Yu CX, Yu HW, Yu JS, Yu SP, Yuan CZ, Yuan Y, Zafar AA, Zallo A, Zang SL, Zeng Y, Zhang BX, Zhang BY, Zhang C, Zhang CC, Zhang DH, Zhang HH, Zhang HY, Zhang L, Zhang JQ, Zhang JW, Zhang JY, Zhang JZ, Zhang R, Zhang SH, Zhang XJ, Zhang XY, Zhang Y, Zhang YH, Zhang ZH, Zhang ZP, Zhang ZY, Zhao G, Zhao HS, Zhao JW, Zhao L, Zhao L, Zhao MG, Zhao Q, Zhao SJ, Zhao TC, Zhao XH, Zhao YB, Zhao ZG, Zhemchugov A, Zheng B, Zheng JP, Zheng YH, Zhong B, Zhou L, Zhou X, Zhou XK, Zhou XR, Zhu C, Zhu K, Zhu KJ, Zhu SH, Zhu XL, Zhu YC, Zhu YS, Zhu ZA, Zhuang J, Zou BS, Zou JH. Observation of a charged charmoniumlike structure in e+ e- → (D* D*)± π∓ at √s = 4.26 GeV. Phys Rev Lett 2014; 112:132001. [PMID: 24745407 DOI: 10.1103/physrevlett.112.132001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Indexed: 06/03/2023]
Abstract
We study the process e+ e- →(D* D*)± π∓ at a center-of-mass energy of 4.26 GeV using a 827 pb(-1) data sample obtained with the BESIII detector at the Beijing Electron Positron Collider. Based on a partial reconstruction technique, the Born cross section is measured to be (137±9±15) pb. We observe a structure near the (D* D*)± threshold in the π∓ recoil mass spectrum, which we denote as the Zc±(4025). The measured mass and width of the structure are (4026.3±2.6±3.7) MeV/c2 and (24.8±5.6±7.7) MeV, respectively. Its production ratio σ(e+ e- → Zc±(4025)π∓ → (D* D*)± π∓)/σ(e+ e- → (D* D*)± π∓) is determined to be 0.65±0.09±0.06. The first uncertainties are statistical and the second are systematic.
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Affiliation(s)
- M Ablikim
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M N Achasov
- G. I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia
| | - O Albayrak
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - D J Ambrose
- University of Rochester, Rochester, New York 14627, USA
| | - F F An
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q An
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - J Z Bai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | | | - Y Ban
- Peking University, Beijing 100871, People's Republic of China
| | - J Becker
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - J V Bennett
- Indiana University, Bloomington, Indiana 47405, USA
| | - M Bertani
- INFN Laboratori Nazionali di Frascati, I-00044, Frascati, Italy
| | - J M Bian
- University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - E Boger
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - O Bondarenko
- KVI, University of Groningen, NL-9747 AA Groningen, The Netherlands
| | - I Boyko
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - S Braun
- Universitaet Giessen, D-35392 Giessen, Germany
| | - R A Briere
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - V Bytev
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - H Cai
- Wuhan University, Wuhan 430072, People's Republic of China
| | - X Cai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - O Cakir
- Ankara University, Dogol Caddesi, 06100 Tandogan, Ankara, Turkey
| | - A Calcaterra
- INFN Laboratori Nazionali di Frascati, I-00044, Frascati, Italy
| | - G F Cao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S A Cetin
- Dogus University, 34722 Istanbul, Turkey
| | - J F Chang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G Chelkov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - G Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H S Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J C Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M L Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S J Chen
- Nanjing University, Nanjing 210093, People's Republic of China
| | - X R Chen
- Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Y B Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H P Cheng
- Huangshan College, Huangshan 245000, People's Republic of China
| | - Y P Chu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | | | - H L Dai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J P Dai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - D Dedovich
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - Z Y Deng
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - A Denig
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - I Denysenko
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - M Destefanis
- University of Turin, I-10125 Turin, Italy and INFN, I-10125 Turin, Italy
| | - W M Ding
- Shandong University, Jinan 250100, People's Republic of China
| | - Y Ding
- Liaoning University, Shenyang 110036, People's Republic of China
| | - L Y Dong
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Y Dong
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S X Du
- Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - J Fang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S S Fang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L Fava
- University of Eastern Piedmont, I-15121 Alessandria, Italy and INFN, I-10125 Turin, Italy
| | - C Q Feng
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - P Friedel
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - C D Fu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J L Fu
- Nanjing University, Nanjing 210093, People's Republic of China
| | - O Fuks
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - Y Gao
- Tsinghua University, Beijing 100084, People's Republic of China
| | - C Geng
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - K Goetzen
- GSI Helmholtzcentre for Heavy Ion Research GmbH, D-64291 Darmstadt, Germany
| | - W X Gong
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - W Gradl
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - M Greco
- University of Turin, I-10125 Turin, Italy and INFN, I-10125 Turin, Italy
| | - M H Gu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y T Gu
- GuangXi University, Nanning 530004, People's Republic of China
| | - Y H Guan
- Institute of High Energy Physics, Beijing 100049, People's Republic of China and University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - A Q Guo
- Nankai University, Tianjin 300071, People's Republic of China
| | - L B Guo
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - T Guo
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - Y P Guo
- Nankai University, Tianjin 300071, People's Republic of China
| | - Y L Han
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - F A Harris
- University of Hawaii, Honolulu, Hawaii 96822, USA
| | - K L He
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M He
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z Y He
- Nankai University, Tianjin 300071, People's Republic of China
| | - T Held
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - Y K Heng
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z L Hou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C Hu
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - H M Hu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J F Hu
- Universitaet Giessen, D-35392 Giessen, Germany
| | - T Hu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G M Huang
- Central China Normal University, Wuhan 430079, People's Republic of China
| | - G S Huang
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - J S Huang
- Henan Normal University, Xinxiang 453007, People's Republic of China
| | - L Huang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X T Huang
- Shandong University, Jinan 250100, People's Republic of China
| | - Y Huang
- Nanjing University, Nanjing 210093, People's Republic of China
| | - T Hussain
- University of the Punjab, Lahore-54590, Pakistan
| | - C S Ji
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Q Ji
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q P Ji
- Nankai University, Tianjin 300071, People's Republic of China
| | - X B Ji
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X L Ji
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L L Jiang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X S Jiang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J B Jiao
- Shandong University, Jinan 250100, People's Republic of China
| | - Z Jiao
- Huangshan College, Huangshan 245000, People's Republic of China
| | - D P Jin
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S Jin
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - F F Jing
- Tsinghua University, Beijing 100084, People's Republic of China
| | | | - M Kavatsyuk
- KVI, University of Groningen, NL-9747 AA Groningen, The Netherlands
| | - B Kloss
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - B Kopf
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - M Kornicer
- University of Hawaii, Honolulu, Hawaii 96822, USA
| | - W Kuehn
- Universitaet Giessen, D-35392 Giessen, Germany
| | - W Lai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J S Lange
- Universitaet Giessen, D-35392 Giessen, Germany
| | - M Lara
- Indiana University, Bloomington, Indiana 47405, USA
| | - P Larin
- Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - M Leyhe
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - C H Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Cheng Li
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Cui Li
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - D M Li
- Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - F Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H B Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J C Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - K Li
- Hangzhou Normal University, Hangzhou 310036, People's Republic of China
| | - Lei Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - P R Li
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Q J Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - W D Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - W G Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X L Li
- Shandong University, Jinan 250100, People's Republic of China
| | - X N Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X Q Li
- Nankai University, Tianjin 300071, People's Republic of China
| | - X R Li
- Seoul National University, Seoul 151-747, Korea
| | - Z B Li
- Sun Yat-Sen University, Guangzhou 510275, People's Republic of China
| | - H Liang
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Y F Liang
- Sichuan University, Chengdu 610064, People's Republic of China
| | - Y T Liang
- Universitaet Giessen, D-35392 Giessen, Germany
| | - G R Liao
- Tsinghua University, Beijing 100084, People's Republic of China
| | - X T Liao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - D X Lin
- Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - B J Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C L Liu
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - C X Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - F H Liu
- Shanxi University, Taiyuan 030006, People's Republic of China
| | - Fang Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Feng Liu
- Central China Normal University, Wuhan 430079, People's Republic of China
| | - H Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H B Liu
- GuangXi University, Nanning 530004, People's Republic of China
| | - H H Liu
- Henan University of Science and Technology, Luoyang 471003, People's Republic of China
| | - H M Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H W Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J P Liu
- Wuhan University, Wuhan 430072, People's Republic of China
| | - K Liu
- Tsinghua University, Beijing 100084, People's Republic of China
| | - K Y Liu
- Liaoning University, Shenyang 110036, People's Republic of China
| | - L D Liu
- Peking University, Beijing 100871, People's Republic of China
| | - P L Liu
- Shandong University, Jinan 250100, People's Republic of China
| | - Q Liu
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - S B Liu
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - X Liu
- Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Y B Liu
- Nankai University, Tianjin 300071, People's Republic of China
| | - Z A Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Zhiqiang Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Zhiqing Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H Loehner
- KVI, University of Groningen, NL-9747 AA Groningen, The Netherlands
| | - X C Lou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G R Lu
- Henan Normal University, Xinxiang 453007, People's Republic of China
| | - H J Lu
- Huangshan College, Huangshan 245000, People's Republic of China
| | - J G Lu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X R Lu
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Y P Lu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C L Luo
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - M X Luo
- Zhejiang University, Hangzhou 310027, People's Republic of China
| | - T Luo
- University of Hawaii, Honolulu, Hawaii 96822, USA
| | - X L Luo
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Lv
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - F C Ma
- Liaoning University, Shenyang 110036, People's Republic of China
| | - H L Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q M Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - T Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X Y Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - F E Maas
- Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - M Maggiora
- University of Turin, I-10125 Turin, Italy and INFN, I-10125 Turin, Italy
| | - Q A Malik
- University of the Punjab, Lahore-54590, Pakistan
| | - Y J Mao
- Peking University, Beijing 100871, People's Republic of China
| | - Z P Mao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J G Messchendorp
- KVI, University of Groningen, NL-9747 AA Groningen, The Netherlands
| | - J Min
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - T J Min
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - R E Mitchell
- Indiana University, Bloomington, Indiana 47405, USA
| | - X H Mo
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H Moeini
- KVI, University of Groningen, NL-9747 AA Groningen, The Netherlands
| | - C Morales Morales
- Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - K Moriya
- Indiana University, Bloomington, Indiana 47405, USA
| | - N Yu Muchnoi
- G. I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia
| | - H Muramatsu
- University of Rochester, Rochester, New York 14627, USA
| | - Y Nefedov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - I B Nikolaev
- G. I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia
| | - Z Ning
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S L Olsen
- Seoul National University, Seoul 151-747, Korea
| | - Q Ouyang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S Pacetti
- INFN and University of Perugia, I-06100, Perugia, Italy
| | - J W Park
- University of Hawaii, Honolulu, Hawaii 96822, USA
| | - M Pelizaeus
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - H P Peng
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - K Peters
- GSI Helmholtzcentre for Heavy Ion Research GmbH, D-64291 Darmstadt, Germany
| | - J L Ping
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - R G Ping
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - R Poling
- University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - E Prencipe
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - M Qi
- Nanjing University, Nanjing 210093, People's Republic of China
| | - S Qian
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C F Qiao
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - L Q Qin
- Shandong University, Jinan 250100, People's Republic of China
| | - X S Qin
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y Qin
- Peking University, Beijing 100871, People's Republic of China
| | - Z H Qin
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J F Qiu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - K H Rashid
- University of the Punjab, Lahore-54590, Pakistan
| | - C F Redmer
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - G Rong
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X D Ruan
- GuangXi University, Nanning 530004, People's Republic of China
| | - A Sarantsev
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - M Shao
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - C P Shen
- Beihang University, Beijing 100191, People's Republic of China
| | - X Y Shen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H Y Sheng
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M R Shepherd
- Indiana University, Bloomington, Indiana 47405, USA
| | - W M Song
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X Y Song
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S Spataro
- University of Turin, I-10125 Turin, Italy and INFN, I-10125 Turin, Italy
| | - B Spruck
- Universitaet Giessen, D-35392 Giessen, Germany
| | - D H Sun
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G X Sun
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J F Sun
- Henan Normal University, Xinxiang 453007, People's Republic of China
| | - S S Sun
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y J Sun
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Y Z Sun
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z J Sun
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z T Sun
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - C J Tang
- Sichuan University, Chengdu 610064, People's Republic of China
| | - X Tang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - I Tapan
- Uludag University, 16059 Bursa, Turkey
| | - E H Thorndike
- University of Rochester, Rochester, New York 14627, USA
| | - D Toth
- University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - M Ullrich
- Universitaet Giessen, D-35392 Giessen, Germany
| | - I Uman
- Dogus University, 34722 Istanbul, Turkey
| | - G S Varner
- University of Hawaii, Honolulu, Hawaii 96822, USA
| | - B Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - D Wang
- Peking University, Beijing 100871, People's Republic of China
| | - D Y Wang
- Peking University, Beijing 100871, People's Republic of China
| | - K Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L L Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L S Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Wang
- Shandong University, Jinan 250100, People's Republic of China
| | - P Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - P L Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q J Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S G Wang
- Peking University, Beijing 100871, People's Republic of China
| | - X F Wang
- Tsinghua University, Beijing 100084, People's Republic of China
| | - X L Wang
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Y D Wang
- INFN Laboratori Nazionali di Frascati, I-00044, Frascati, Italy
| | - Y F Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y Q Wang
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - Z Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z G Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z Y Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - D H Wei
- Guangxi Normal University, Guilin 541004, People's Republic of China
| | - J B Wei
- Peking University, Beijing 100871, People's Republic of China
| | - P Weidenkaff
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - Q G Wen
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - S P Wen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Werner
- Universitaet Giessen, D-35392 Giessen, Germany
| | - U Wiedner
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - L H Wu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - N Wu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S X Wu
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - W Wu
- Nankai University, Tianjin 300071, People's Republic of China
| | - Z Wu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L G Xia
- Tsinghua University, Beijing 100084, People's Republic of China
| | - Y X Xia
- Hunan University, Changsha 410082, People's Republic of China
| | - Z J Xiao
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - Y G Xie
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q L Xiu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G F Xu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q J Xu
- Hangzhou Normal University, Hangzhou 310036, People's Republic of China
| | - Q N Xu
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - X P Xu
- Soochow University, Suzhou 215006, People's Republic of China
| | - Z R Xu
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Z Xue
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L Yan
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - W B Yan
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Y H Yan
- Hunan University, Changsha 410082, People's Republic of China
| | - H X Yang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y Yang
- Central China Normal University, Wuhan 430079, People's Republic of China
| | - Y X Yang
- Guangxi Normal University, Guilin 541004, People's Republic of China
| | - H Ye
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Ye
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M H Ye
- China Center of Advanced Science and Technology, Beijing 100190, People's Republic of China
| | - B X Yu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C X Yu
- Nankai University, Tianjin 300071, People's Republic of China
| | - H W Yu
- Peking University, Beijing 100871, People's Republic of China
| | - J S Yu
- Lanzhou University, Lanzhou 730000, People's Republic of China
| | - S P Yu
- Shandong University, Jinan 250100, People's Republic of China
| | - C Z Yuan
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y Yuan
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - A A Zafar
- University of the Punjab, Lahore-54590, Pakistan
| | - A Zallo
- INFN Laboratori Nazionali di Frascati, I-00044, Frascati, Italy
| | - S L Zang
- Nanjing University, Nanjing 210093, People's Republic of China
| | - Y Zeng
- Hunan University, Changsha 410082, People's Republic of China
| | - B X Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - B Y Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C Zhang
- Nanjing University, Nanjing 210093, People's Republic of China
| | - C C Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - D H Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H H Zhang
- Sun Yat-Sen University, Guangzhou 510275, People's Republic of China
| | - H Y Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J Q Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J W Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J Y Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J Z Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - R Zhang
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - S H Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X J Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X Y Zhang
- Shandong University, Jinan 250100, People's Republic of China
| | - Y Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y H Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z H Zhang
- Central China Normal University, Wuhan 430079, People's Republic of China
| | - Z P Zhang
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Z Y Zhang
- Wuhan University, Wuhan 430072, People's Republic of China
| | - G Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H S Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J W Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Lei Zhao
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Ling Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M G Zhao
- Nankai University, Tianjin 300071, People's Republic of China
| | - Q Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S J Zhao
- Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - T C Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X H Zhao
- Nanjing University, Nanjing 210093, People's Republic of China
| | - Y B Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z G Zhao
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - A Zhemchugov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - B Zheng
- University of South China, Hengyang 421001, People's Republic of China
| | - J P Zheng
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y H Zheng
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - B Zhong
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - L Zhou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X Zhou
- Wuhan University, Wuhan 430072, People's Republic of China
| | - X K Zhou
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - X R Zhou
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - C Zhu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - K Zhu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - K J Zhu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S H Zhu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X L Zhu
- Tsinghua University, Beijing 100084, People's Republic of China
| | - Y C Zhu
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Y S Zhu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z A Zhu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J Zhuang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - B S Zou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J H Zou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
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Ablikim M, Achasov MN, Ai XC, Albayrak O, Ambrose DJ, An FF, An Q, Bai JZ, Baldini Ferroli R, Ban Y, Bennett JV, Bertani M, Bian JM, Boger E, Bondarenko O, Boyko I, Braun S, Briere RA, Cai H, Cai X, Cakir O, Calcaterra A, Cao GF, Cetin SA, Chang JF, Chelkov G, Chen G, Chen HS, Chen JC, Chen ML, Chen SJ, Chen X, Chen XR, Chen YB, Cheng HP, Chu XK, Chu YP, Cronin-Hennessy D, Dai HL, Dai JP, Dedovich D, Deng ZY, Denig A, Denysenko I, Destefanis M, Ding WM, Ding Y, Dong C, Dong J, Dong LY, Dong MY, Du SX, Fan JZ, Fang J, Fang SS, Fang Y, Fava L, Feng CQ, Fu CD, Fu JL, Fuks O, Gao Q, Gao Y, Geng C, Goetzen K, Gong WX, Gradl W, Greco M, Gu MH, Gu YT, Guan YH, Guo AQ, Guo LB, Guo T, Guo YP, Han YL, Harris FA, He KL, He M, He ZY, Held T, Heng YK, Hou ZL, Hu C, Hu HM, Hu JF, Hu T, Huang GM, Huang GS, Huang JS, Huang L, Huang XT, Huang Y, Hussain T, Ji CS, Ji Q, Ji QP, Ji XB, Ji XL, Jiang LL, Jiang XS, Jiao JB, Jiao Z, Jin DP, Jin S, Johansson T, Kalantar-Nayestanaki N, Kang XL, Kang XS, Kavatsyuk M, Kloss B, Kopf B, Kornicer M, Kuehn W, Kupsc A, Lai W, Lange JS, Lara M, Larin P, Leyhe M, Li CH, Li C, Li C, Li D, Li DM, Li F, Li G, Li HB, Li JC, Li K, Li K, Li L, Li PR, Li QJ, Li T, Li WD, Li WG, Li XL, Li XN, Li XQ, Li XR, Li ZB, Liang H, Liang YF, Liang YT, Lin DX, Liu BJ, Liu CL, Liu CX, Liu FH, Liu F, Liu F, Liu HB, Liu HH, Liu HM, Liu J, Liu JP, Liu K, Liu KY, Liu PL, Liu Q, Liu SB, Liu X, Liu YB, Liu ZA, Liu Z, Liu Z, Loehner H, Lou XC, Lu GR, Lu HJ, Lu HL, Lu JG, Lu XR, Lu Y, Lu YP, Luo CL, Luo MX, Luo T, Luo XL, Lv M, Ma FC, Ma HL, Ma QM, Ma S, Ma T, Ma XY, Maas FE, Maggiora M, Malik QA, Mao YJ, Mao ZP, Messchendorp JG, Min J, Min TJ, Mitchell RE, Mo XH, Mo YJ, Moeini H, Morales Morales C, Moriya K, Muchnoi NY, Muramatsu H, Nefedov Y, Nikolaev IB, Ning Z, Nisar S, Niu XY, Olsen SL, Ouyang Q, Pacetti S, Pelizaeus M, Peng HP, Peters K, Ping JL, Ping RG, Poling R, Prencipe E, Qi M, Qian S, Qiao CF, Qin LQ, Qin XS, Qin Y, Qin ZH, Qiu JF, Rashid KH, Redmer CF, Ripka M, Rong G, Ruan XD, Sarantsev A, Schoenning K, Schumann S, Shan W, Shao M, Shen CP, Shen XY, Sheng HY, Shepherd MR, Song WM, Song XY, Spataro S, Spruck B, Sun GX, Sun JF, Sun SS, Sun YJ, Sun YZ, Sun ZJ, Sun ZT, Tang CJ, Tang X, Tapan I, Thorndike EH, Toth D, Ullrich M, Uman I, Varner GS, Wang B, Wang D, Wang DY, Wang K, Wang LL, Wang LS, Wang M, Wang P, Wang PL, Wang QJ, Wang SG, Wang W, Wang XF, Wang YD, Wang YF, Wang YQ, Wang Z, Wang ZG, Wang ZH, Wang ZY, Wei DH, Wei JB, Weidenkaff P, Wen SP, Werner M, Wiedner U, Wolke M, Wu LH, Wu N, Wu Z, Xia LG, Xia Y, Xiao D, Xiao ZJ, Xie YG, Xiu QL, Xu GF, Xu L, Xu QJ, Xu QN, Xu XP, Xue Z, Yan L, Yan WB, Yan WC, Yan YH, Yang HX, Yang Y, Yang YX, Ye H, Ye M, Ye MH, Yu BX, Yu CX, Yu HW, Yu JS, Yu SP, Yuan CZ, Yuan WL, Yuan Y, Zafar AA, Zallo A, Zang SL, Zeng Y, Zhang BX, Zhang BY, Zhang C, Zhang CB, Zhang CC, Zhang DH, Zhang HH, Zhang HY, Zhang JJ, Zhang JQ, Zhang JW, Zhang JY, Zhang JZ, Zhang SH, Zhang XJ, Zhang XY, Zhang Y, Zhang YH, Zhang ZH, Zhang ZP, Zhang ZY, Zhao G, Zhao JW, Zhao L, Zhao L, Zhao MG, Zhao Q, Zhao QW, Zhao SJ, Zhao TC, Zhao XH, Zhao YB, Zhao ZG, Zhemchugov A, Zheng B, Zheng JP, Zheng YH, Zhong B, Zhou L, Zhou L, Zhou X, Zhou XK, Zhou XR, Zhou XY, Zhu K, Zhu KJ, Zhu XL, Zhu YC, Zhu YS, Zhu ZA, Zhuang J, Zou BS, Zou JH. Observation of e+e- → γX(3872) at BESIII. Phys Rev Lett 2014; 112:092001. [PMID: 24655246 DOI: 10.1103/physrevlett.112.092001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Indexed: 06/03/2023]
Abstract
With data samples collected with the BESIII detector operating at the BEPCII storage ring at center-of-mass energies from 4.009 to 4.420 GeV, the process e+e-→ γX(3872) is observed for the first time with a statistical significance of 6.3σ. The measured mass of the X(3872) is (3871.9 ± 0.7s tat ± 0.2 syst) MeV/c(2), in agreement with previous measurements. Measurements of the product of the cross section σ[e+e- → γX(3872)] and the branching fraction B[X(3872)→π+π-J/ψ] at center-of-mass energies 4.009, 4.229, 4.260, and 4.360 GeV are reported. Our measurements are consistent with expectations for the radiative transition process Y(4260) → γX(3872).
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Affiliation(s)
- M Ablikim
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M N Achasov
- G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia
| | - X C Ai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - O Albayrak
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - D J Ambrose
- University of Rochester, Rochester, New York 14627, USA
| | - F F An
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q An
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - J Z Bai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | | | - Y Ban
- Peking University, Beijing 100871, People's Republic of China
| | - J V Bennett
- Indiana University, Bloomington, Indiana 47405, USA
| | - M Bertani
- INFN Laboratori Nazionali di Frascati, I-00044 Frascati, Italy
| | - J M Bian
- University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - E Boger
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - O Bondarenko
- KVI, University of Groningen, NL-9747 AA Groningen, The Netherlands
| | - I Boyko
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - S Braun
- Universitaet Giessen, D-35392 Giessen, Germany
| | - R A Briere
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - H Cai
- Wuhan University, Wuhan 430072, People's Republic of China
| | - X Cai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - O Cakir
- Ankara University, Dogol Caddesi, 06100 Tandogan, Ankara, Turkey
| | - A Calcaterra
- INFN Laboratori Nazionali di Frascati, I-00044 Frascati, Italy
| | - G F Cao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S A Cetin
- Dogus University, 34722 Istanbul, Turkey
| | - J F Chang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G Chelkov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - G Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H S Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J C Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M L Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S J Chen
- Nanjing University, Nanjing 210093, People's Republic of China
| | - X Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X R Chen
- Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Y B Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H P Cheng
- Huangshan College, Huangshan 245000, People's Republic of China
| | - X K Chu
- Peking University, Beijing 100871, People's Republic of China
| | - Y P Chu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | | | - H L Dai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J P Dai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - D Dedovich
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - Z Y Deng
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - A Denig
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - I Denysenko
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - M Destefanis
- University of Turin, I-10125 Turin, Italy and INFN, I-10125 Turin, Italy
| | - W M Ding
- Shandong University, Jinan 250100, People's Republic of China
| | - Y Ding
- Liaoning University, Shenyang 110036, People's Republic of China
| | - C Dong
- Nankai university, Tianjin 300071, People's Republic of China
| | - J Dong
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L Y Dong
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Y Dong
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S X Du
- Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - J Z Fan
- Tsinghua University, Beijing 100084, People's Republic of China
| | - J Fang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S S Fang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y Fang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L Fava
- University of Eastern Piedmont, I-15121 Alessandria, Italy and INFN, I-10125 Turin, Italy
| | - C Q Feng
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - C D Fu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J L Fu
- Nanjing University, Nanjing 210093, People's Republic of China
| | - O Fuks
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - Q Gao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y Gao
- Tsinghua University, Beijing 100084, People's Republic of China
| | - C Geng
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - K Goetzen
- GSI Helmholtzcentre for Heavy Ion Research GmbH, D-64291 Darmstadt, Germany
| | - W X Gong
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - W Gradl
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - M Greco
- University of Turin, I-10125 Turin, Italy and INFN, I-10125 Turin, Italy
| | - M H Gu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y T Gu
- GuangXi University, Nanning 530004, People's Republic of China
| | - Y H Guan
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - A Q Guo
- Nankai university, Tianjin 300071, People's Republic of China
| | - L B Guo
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - T Guo
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - Y P Guo
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - Y L Han
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - F A Harris
- University of Hawaii, Honolulu, Hawaii 96822, USA
| | - K L He
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M He
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z Y He
- Nankai university, Tianjin 300071, People's Republic of China
| | - T Held
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - Y K Heng
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z L Hou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C Hu
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - H M Hu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J F Hu
- Universitaet Giessen, D-35392 Giessen, Germany
| | - T Hu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G M Huang
- Central China Normal University, Wuhan 430079, People's Republic of China
| | - G S Huang
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - J S Huang
- Henan Normal University, Xinxiang 453007, People's Republic of China
| | - L Huang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X T Huang
- Shandong University, Jinan 250100, People's Republic of China
| | - Y Huang
- Nanjing University, Nanjing 210093, People's Republic of China
| | - T Hussain
- University of the Punjab, Lahore 54590, Pakistan
| | - C S Ji
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Q Ji
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q P Ji
- Nankai university, Tianjin 300071, People's Republic of China
| | - X B Ji
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X L Ji
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L L Jiang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X S Jiang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J B Jiao
- Shandong University, Jinan 250100, People's Republic of China
| | - Z Jiao
- Huangshan College, Huangshan 245000, People's Republic of China
| | - D P Jin
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S Jin
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - T Johansson
- Uppsala University, Box 516, SE-75120 Uppsala, Sweden
| | | | - X L Kang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X S Kang
- Nankai university, Tianjin 300071, People's Republic of China
| | - M Kavatsyuk
- KVI, University of Groningen, NL-9747 AA Groningen, The Netherlands
| | - B Kloss
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - B Kopf
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - M Kornicer
- University of Hawaii, Honolulu, Hawaii 96822, USA
| | - W Kuehn
- Universitaet Giessen, D-35392 Giessen, Germany
| | - A Kupsc
- Uppsala University, Box 516, SE-75120 Uppsala, Sweden
| | - W Lai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J S Lange
- Universitaet Giessen, D-35392 Giessen, Germany
| | - M Lara
- Indiana University, Bloomington, Indiana 47405, USA
| | - P Larin
- Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - M Leyhe
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - C H Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Cheng Li
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Cui Li
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - D Li
- Hunan University, Changsha 410082, People's Republic of China
| | - D M Li
- Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - F Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H B Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J C Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - K Li
- Shandong University, Jinan 250100, People's Republic of China
| | - K Li
- Hangzhou Normal University, Hangzhou 310036, People's Republic of China
| | - Lei Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - P R Li
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Q J Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - T Li
- Shandong University, Jinan 250100, People's Republic of China
| | - W D Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - W G Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X L Li
- Shandong University, Jinan 250100, People's Republic of China
| | - X N Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X Q Li
- Nankai university, Tianjin 300071, People's Republic of China
| | - X R Li
- Seoul National University, Seoul 151-747, Korea
| | - Z B Li
- Sun Yat-Sen University, Guangzhou 510275, People's Republic of China
| | - H Liang
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Y F Liang
- Sichuan University, Chengdu 610064, People's Republic of China
| | - Y T Liang
- Universitaet Giessen, D-35392 Giessen, Germany
| | - D X Lin
- Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - B J Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C L Liu
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - C X Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - F H Liu
- Shanxi University, Taiyuan 030006, People's Republic of China
| | - Fang Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Feng Liu
- Central China Normal University, Wuhan 430079, People's Republic of China
| | - H B Liu
- GuangXi University, Nanning 530004, People's Republic of China
| | - H H Liu
- Henan University of Science and Technology, Luoyang 471003, People's Republic of China
| | - H M Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J P Liu
- Wuhan University, Wuhan 430072, People's Republic of China
| | - K Liu
- Tsinghua University, Beijing 100084, People's Republic of China
| | - K Y Liu
- Liaoning University, Shenyang 110036, People's Republic of China
| | - P L Liu
- Shandong University, Jinan 250100, People's Republic of China
| | - Q Liu
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - S B Liu
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - X Liu
- Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Y B Liu
- Nankai university, Tianjin 300071, People's Republic of China
| | - Z A Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Zhiqiang Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Zhiqing Liu
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - H Loehner
- KVI, University of Groningen, NL-9747 AA Groningen, The Netherlands
| | - X C Lou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G R Lu
- Henan Normal University, Xinxiang 453007, People's Republic of China
| | - H J Lu
- Huangshan College, Huangshan 245000, People's Republic of China
| | - H L Lu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J G Lu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X R Lu
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Y Lu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y P Lu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C L Luo
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - M X Luo
- Zhejiang University, Hangzhou 310027, People's Republic of China
| | - T Luo
- University of Hawaii, Honolulu, Hawaii 96822, USA
| | - X L Luo
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Lv
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - F C Ma
- Liaoning University, Shenyang 110036, People's Republic of China
| | - H L Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q M Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - T Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X Y Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - F E Maas
- Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - M Maggiora
- University of Turin, I-10125 Turin, Italy and INFN, I-10125 Turin, Italy
| | - Q A Malik
- University of the Punjab, Lahore 54590, Pakistan
| | - Y J Mao
- Peking University, Beijing 100871, People's Republic of China
| | - Z P Mao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J G Messchendorp
- KVI, University of Groningen, NL-9747 AA Groningen, The Netherlands
| | - J Min
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - T J Min
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - R E Mitchell
- Indiana University, Bloomington, Indiana 47405, USA
| | - X H Mo
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y J Mo
- Central China Normal University, Wuhan 430079, People's Republic of China
| | - H Moeini
- KVI, University of Groningen, NL-9747 AA Groningen, The Netherlands
| | - C Morales Morales
- Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - K Moriya
- Indiana University, Bloomington, Indiana 47405, USA
| | - N Yu Muchnoi
- G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia
| | - H Muramatsu
- University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - Y Nefedov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - I B Nikolaev
- G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia
| | - Z Ning
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S Nisar
- COMSATS Institute of Information Technology, Lahore, Defence Road, Off Raiwind Road, 54000 Lahore, Pakistan
| | - X Y Niu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S L Olsen
- Seoul National University, Seoul 151-747, Korea
| | - Q Ouyang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S Pacetti
- INFN and University of Perugia, I-06100 Perugia, Italy
| | - M Pelizaeus
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - H P Peng
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - K Peters
- GSI Helmholtzcentre for Heavy Ion Research GmbH, D-64291 Darmstadt, Germany
| | - J L Ping
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - R G Ping
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - R Poling
- University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - E Prencipe
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - M Qi
- Nanjing University, Nanjing 210093, People's Republic of China
| | - S Qian
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C F Qiao
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - L Q Qin
- Shandong University, Jinan 250100, People's Republic of China
| | - X S Qin
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y Qin
- Peking University, Beijing 100871, People's Republic of China
| | - Z H Qin
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J F Qiu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - K H Rashid
- University of the Punjab, Lahore 54590, Pakistan
| | - C F Redmer
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - M Ripka
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - G Rong
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X D Ruan
- GuangXi University, Nanning 530004, People's Republic of China
| | - A Sarantsev
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - K Schoenning
- Uppsala University, Box 516, SE-75120 Uppsala, Sweden
| | - S Schumann
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - W Shan
- Peking University, Beijing 100871, People's Republic of China
| | - M Shao
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - C P Shen
- Beihang University, Beijing 100191, People's Republic of China
| | - X Y Shen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H Y Sheng
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M R Shepherd
- Indiana University, Bloomington, Indiana 47405, USA
| | - W M Song
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X Y Song
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S Spataro
- University of Turin, I-10125 Turin, Italy and INFN, I-10125 Turin, Italy
| | - B Spruck
- Universitaet Giessen, D-35392 Giessen, Germany
| | - G X Sun
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J F Sun
- Henan Normal University, Xinxiang 453007, People's Republic of China
| | - S S Sun
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y J Sun
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Y Z Sun
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z J Sun
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z T Sun
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - C J Tang
- Sichuan University, Chengdu 610064, People's Republic of China
| | - X Tang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - I Tapan
- Uludag University, 16059 Bursa, Turkey
| | - E H Thorndike
- University of Rochester, Rochester, New York 14627, USA
| | - D Toth
- University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - M Ullrich
- Universitaet Giessen, D-35392 Giessen, Germany
| | - I Uman
- Dogus University, 34722 Istanbul, Turkey
| | - G S Varner
- University of Hawaii, Honolulu, Hawaii 96822, USA
| | - B Wang
- Nankai university, Tianjin 300071, People's Republic of China
| | - D Wang
- Peking University, Beijing 100871, People's Republic of China
| | - D Y Wang
- Peking University, Beijing 100871, People's Republic of China
| | - K Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L L Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L S Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Wang
- Shandong University, Jinan 250100, People's Republic of China
| | - P Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - P L Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q J Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S G Wang
- Peking University, Beijing 100871, People's Republic of China
| | - W Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X F Wang
- Tsinghua University, Beijing 100084, People's Republic of China
| | - Y D Wang
- INFN Laboratori Nazionali di Frascati, I-00044 Frascati, Italy
| | - Y F Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y Q Wang
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - Z Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z G Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z H Wang
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Z Y Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - D H Wei
- Guangxi Normal University, Guilin 541004, People's Republic of China
| | - J B Wei
- Peking University, Beijing 100871, People's Republic of China
| | - P Weidenkaff
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - S P Wen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Werner
- Universitaet Giessen, D-35392 Giessen, Germany
| | - U Wiedner
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - M Wolke
- Uppsala University, Box 516, SE-75120 Uppsala, Sweden
| | - L H Wu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - N Wu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z Wu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L G Xia
- Tsinghua University, Beijing 100084, People's Republic of China
| | - Y Xia
- Hunan University, Changsha 410082, People's Republic of China
| | - D Xiao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z J Xiao
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - Y G Xie
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q L Xiu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G F Xu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L Xu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q J Xu
- Hangzhou Normal University, Hangzhou 310036, People's Republic of China
| | - Q N Xu
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - X P Xu
- Soochow University, Suzhou 215006, People's Republic of China
| | - Z Xue
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L Yan
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - W B Yan
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - W C Yan
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Y H Yan
- Hunan University, Changsha 410082, People's Republic of China
| | - H X Yang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y Yang
- Central China Normal University, Wuhan 430079, People's Republic of China
| | - Y X Yang
- Guangxi Normal University, Guilin 541004, People's Republic of China
| | - H Ye
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Ye
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M H Ye
- China Center of Advanced Science and Technology, Beijing 100190, People's Republic of China
| | - B X Yu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C X Yu
- Nankai university, Tianjin 300071, People's Republic of China
| | - H W Yu
- Peking University, Beijing 100871, People's Republic of China
| | - J S Yu
- Lanzhou University, Lanzhou 730000, People's Republic of China
| | - S P Yu
- Shandong University, Jinan 250100, People's Republic of China
| | - C Z Yuan
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - W L Yuan
- Nanjing University, Nanjing 210093, People's Republic of China
| | - Y Yuan
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - A A Zafar
- University of the Punjab, Lahore 54590, Pakistan
| | - A Zallo
- INFN Laboratori Nazionali di Frascati, I-00044 Frascati, Italy
| | - S L Zang
- Nanjing University, Nanjing 210093, People's Republic of China
| | - Y Zeng
- Hunan University, Changsha 410082, People's Republic of China
| | - B X Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - B Y Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C Zhang
- Nanjing University, Nanjing 210093, People's Republic of China
| | - C B Zhang
- Hunan University, Changsha 410082, People's Republic of China
| | - C C Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - D H Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H H Zhang
- Sun Yat-Sen University, Guangzhou 510275, People's Republic of China
| | - H Y Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J J Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J Q Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J W Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J Y Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J Z Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S H Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X J Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X Y Zhang
- Shandong University, Jinan 250100, People's Republic of China
| | - Y Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y H Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z H Zhang
- Central China Normal University, Wuhan 430079, People's Republic of China
| | - Z P Zhang
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Z Y Zhang
- Wuhan University, Wuhan 430072, People's Republic of China
| | - G Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J W Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Lei Zhao
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Ling Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M G Zhao
- Nankai university, Tianjin 300071, People's Republic of China
| | - Q Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q W Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S J Zhao
- Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - T C Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X H Zhao
- Nanjing University, Nanjing 210093, People's Republic of China
| | - Y B Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z G Zhao
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - A Zhemchugov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - B Zheng
- University of South China, Hengyang 421001, People's Republic of China
| | - J P Zheng
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y H Zheng
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - B Zhong
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - L Zhou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Li Zhou
- Nankai university, Tianjin 300071, People's Republic of China
| | - X Zhou
- Wuhan University, Wuhan 430072, People's Republic of China
| | - X K Zhou
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - X R Zhou
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - X Y Zhou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - K Zhu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - K J Zhu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X L Zhu
- Tsinghua University, Beijing 100084, People's Republic of China
| | - Y C Zhu
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Y S Zhu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z A Zhu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J Zhuang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - B S Zou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J H Zou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
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Ablikim M, Achasov MN, Albayrak O, Ambrose DJ, An FF, An Q, Bai JZ, Baldini Ferroli R, Ban Y, Becker J, Bennett JV, Bertani M, Bian JM, Boger E, Bondarenko O, Boyko I, Braun S, Briere RA, Bytev V, Cai H, Cai X, Cakir O, Calcaterra A, Cao GF, Cetin SA, Chang JF, Chelkov G, Chen G, Chen HS, Chen JC, Chen ML, Chen SJ, Chen XR, Chen YB, Cheng HP, Chu XK, Chu YP, Cronin-Hennessy D, Dai HL, Dai JP, Dedovich D, Deng ZY, Denig A, Denysenko I, Destefanis M, Ding WM, Ding Y, Dong LY, Dong MY, Du SX, Fang J, Fang SS, Fava L, Feng CQ, Friedel P, Fu CD, Fu JL, Fuks O, Gao Y, Geng C, Goetzen K, Gong WX, Gradl W, Greco M, Gu MH, Gu YT, Guan YH, Guo AQ, Guo LB, Guo T, Guo YP, Han YL, Harris FA, He KL, He M, He ZY, Held T, Heng YK, Hou ZL, Hu C, Hu HM, Hu JF, Hu T, Huang GM, Huang GS, Huang JS, Huang L, Huang XT, Huang Y, Hussain T, Ji CS, Ji Q, Ji QP, Ji XB, Ji XL, Jiang LL, Jiang XS, Jiao JB, Jiao Z, Jin DP, Jin S, Jing FF, Kalantar-Nayestanaki N, Kavatsyuk M, Kloss B, Kopf B, Kornicer M, Kuehn W, Lai W, Lange JS, Lara M, Larin P, Leyhe M, Li CH, Li C, Li C, Li DL, Li DM, Li F, Li G, Li HB, Li JC, Li K, Li L, Li N, Li PR, Li QJ, Li WD, Li WG, Li XL, Li XN, Li XQ, Li XR, Li ZB, Liang H, Liang YF, Liang YT, Liao GR, Lin DX, Liu BJ, Liu CL, Liu CX, Liu FH, Liu F, Liu F, Liu HB, Liu HH, Liu HM, Liu JP, Liu K, Liu KY, Liu PL, Liu Q, Liu SB, Liu X, Liu YB, Liu ZA, Liu Z, Liu Z, Loehner H, Lou XC, Lu GR, Lu HJ, Lu JG, Lu XR, Lu YP, Luo CL, Luo MX, Luo T, Luo XL, Lv M, Ma FC, Ma HL, Ma QM, Ma S, Ma T, Ma XY, Maas FE, Maggiora M, Malik QA, Mao YJ, Mao ZP, Messchendorp JG, Min J, Min TJ, Mitchell RE, Mo XH, Moeini H, MoralesMorales C, Moriya K, Muchnoi NY, Muramatsu H, Nefedov Y, Nikolaev IB, Ning Z, Nisar S, Olsen SL, Ouyang Q, Pacetti S, Park JW, Pelizaeus M, Peng HP, Peters K, Ping JL, Ping RG, Poling R, Prencipe E, Qi M, Qian S, Qiao CF, Qin LQ, Qin XS, Qin Y, Qin ZH, Qiu JF, Rashid KH, Redmer CF, Ripka M, Rong G, Ruan XD, Sarantsev A, Schumann S, Shan W, Shao M, Shen CP, Shen XY, Sheng HY, Shepherd MR, Song WM, Song XY, Spataro S, Spruck B, Sun GX, Sun JF, Sun SS, Sun YJ, Sun YZ, Sun ZJ, Sun ZT, Tang CJ, Tang X, Tapan I, Thorndike EH, Toth D, Ullrich M, Uman I, Varner GS, Wang B, Wang D, Wang DY, Wang K, Wang LL, Wang LS, Wang M, Wang P, Wang PL, Wang QJ, Wang SG, Wang XF, Wang XL, Wang YD, Wang YF, Wang YQ, Wang Z, Wang ZG, Wang ZH, Wang ZY, Wei DH, Wei JB, Weidenkaff P, Wen QG, Wen SP, Werner M, Wiedner U, Wu LH, Wu N, Wu SX, Wu W, Wu Z, Xia LG, Xia YX, Xiao ZJ, Xie YG, Xiu QL, Xu GF, Xu QJ, Xu QN, Xu XP, Xue Z, Yan L, Yan WB, Yan WC, Yan YH, Yang HX, Yang Y, Yang YX, Yang YZ, Ye H, Ye M, Ye MH, Yu BX, Yu CX, Yu HW, Yu JS, Yu SP, Yuan CZ, Yuan WL, Yuan Y, Zafar AA, Zallo A, Zang SL, Zeng Y, Zhang BX, Zhang BY, Zhang C, Zhang CB, Zhang CC, Zhang DH, Zhang HH, Zhang HY, Zhang JL, Zhang JQ, Zhang JW, Zhang JY, Zhang JZ, Zhang L, Zhang SH, Zhang XJ, Zhang XY, Zhang Y, Zhang YH, Zhang ZP, Zhang ZY, Zhang Z, Zhao G, Zhao JW, Zhao L, Zhao L, Zhao MG, Zhao Q, Zhao SJ, Zhao TC, Zhao XH, Zhao YB, Zhao ZG, Zhemchugov A, Zheng B, Zheng JP, Zheng YH, Zhong B, Zhou L, Zhou X, Zhou XK, Zhou XR, Zhu K, Zhu KJ, Zhu XL, Zhu YC, Zhu YS, Zhu ZA, Zhuang J, Zou BS, Zou JH. Observation of a charged (DD*)± mass peak in e+ e- → πDD* at sqrt[s] = 4.26 GeV. Phys Rev Lett 2014; 112:022001. [PMID: 24484002 DOI: 10.1103/physrevlett.112.022001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Indexed: 06/03/2023]
Abstract
We report on a study of the process e+ e- → π± (DD*)∓ at sqrt[s] = 4.26 GeV using a 525 pb(-1) data sample collected with the BESIII detector at the BEPCII storage ring. A distinct charged structure is observed in the (DD*)∓ invariant mass distribution. When fitted to a mass-dependent-width Breit-Wigner line shape, the pole mass and width are determined to be Mpole = (3883.9±1.5(stat)±4.2(syst)) MeV/c2 and Γpole = (24.8±3.3(stat)±11.0(syst)) MeV. The mass and width of the structure, which we refer to as Zc(3885), are 2σ and 1σ, respectively, below those of the Zc(3900) → π± J/ψ peak observed by BESIII and Belle in π+ π- J/ψ final states produced at the same center-of-mass energy. The angular distribution of the πZc(3885) system favors a JP = 1+ quantum number assignment for the structure and disfavors 1- or 0-. The Born cross section times the DD* branching fraction of the Zc(3885) is measured to be σ(e+ e- → π± Zc(3885)∓)×B(Zc(3885)∓ → (DD*)∓) = (83.5±6.6(stat)±22.0(syst)) pb. Assuming the Zc(3885) → DD* signal reported here and the Zc(3900) → πJ/ψ signal are from the same source, the partial width ratio (Γ(Zc(3885) → DD*)/Γ(Zc(3900) → πJ/ψ)) = 6.2±1.1(stat)±2.7(syst) is determined.
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Affiliation(s)
- M Ablikim
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M N Achasov
- G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia
| | - O Albayrak
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - D J Ambrose
- University of Rochester, Rochester, New York 14627, USA
| | - F F An
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q An
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - J Z Bai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | | | - Y Ban
- Peking University, Beijing 100871, People's Republic of China
| | - J Becker
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - J V Bennett
- Indiana University, Bloomington, Indiana 47405, USA
| | - M Bertani
- INFN Laboratori Nazionali di Frascati, I-00044, Frascati, Italy
| | - J M Bian
- University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - E Boger
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - O Bondarenko
- KVI, University of Groningen, NL-9747 AA Groningen, Netherlands
| | - I Boyko
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - S Braun
- Universitaet Giessen, D-35392 Giessen, Germany
| | - R A Briere
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - V Bytev
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - H Cai
- WuhanUniversity, Wuhan 430072, People's Republic of China
| | - X Cai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - O Cakir
- Ankara University, Dogol Caddesi, 06100 Tandogan, Ankara, Turkey
| | - A Calcaterra
- INFN Laboratori Nazionali di Frascati, I-00044, Frascati, Italy
| | - G F Cao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S A Cetin
- Dogus University, 34722 Istanbul, Turkey
| | - J F Chang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G Chelkov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - G Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H S Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J C Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M L Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S J Chen
- Nanjing University, Nanjing 210093, People's Republic of China
| | - X R Chen
- Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Y B Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H P Cheng
- Huangshan College, Huangshan 245000, People's Republic of China
| | - X K Chu
- Peking University, Beijing 100871, People's Republic of China
| | - Y P Chu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | | | - H L Dai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J P Dai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - D Dedovich
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - Z Y Deng
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - A Denig
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - I Denysenko
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - M Destefanis
- University of Turin, I-10125 Turin, Italy and INFN, I-10125 Turin, Italy
| | - W M Ding
- Shandong University, Jinan 250100, People's Republic of China
| | - Y Ding
- Liaoning University, Shenyang 110036, People's Republic of China
| | - L Y Dong
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Y Dong
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S X Du
- Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - J Fang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S S Fang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L Fava
- University of Eastern Piedmont, I-15121 Alessandria, Italy and INFN, I-10125 Turin, Italy
| | - C Q Feng
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - P Friedel
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - C D Fu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J L Fu
- Nanjing University, Nanjing 210093, People's Republic of China
| | - O Fuks
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - Y Gao
- Tsinghua University, Beijing 100084, People's Republic of China
| | - C Geng
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - K Goetzen
- GSI Helmholtzcentre for Heavy Ion Research GmbH, D-64291 Darmstadt, Germany
| | - W X Gong
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - W Gradl
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - M Greco
- University of Turin, I-10125 Turin, Italy and INFN, I-10125 Turin, Italy
| | - M H Gu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y T Gu
- GuangXi University, Nanning 530004, People's Republic of China
| | - Y H Guan
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - A Q Guo
- Nankai University, Tianjin 300071, People's Republic of China
| | - L B Guo
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - T Guo
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - Y P Guo
- Nankai University, Tianjin 300071, People's Republic of China
| | - Y L Han
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - F A Harris
- University of Hawaii, Honolulu, Hawaii 96822, USA
| | - K L He
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M He
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z Y He
- Nankai University, Tianjin 300071, People's Republic of China
| | - T Held
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - Y K Heng
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z L Hou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C Hu
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - H M Hu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J F Hu
- Universitaet Giessen, D-35392 Giessen, Germany
| | - T Hu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G M Huang
- Central China Normal University, Wuhan 430079, People's Republic of China
| | - G S Huang
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - J S Huang
- Henan Normal University, Xinxiang 453007, People's Republic of China
| | - L Huang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X T Huang
- Shandong University, Jinan 250100, People's Republic of China
| | - Y Huang
- Nanjing University, Nanjing 210093, People's Republic of China
| | - T Hussain
- University of the Punjab, Lahore-54590, Pakistan
| | - C S Ji
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Q Ji
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q P Ji
- Nankai University, Tianjin 300071, People's Republic of China
| | - X B Ji
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X L Ji
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L L Jiang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X S Jiang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J B Jiao
- Shandong University, Jinan 250100, People's Republic of China
| | - Z Jiao
- Huangshan College, Huangshan 245000, People's Republic of China
| | - D P Jin
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S Jin
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - F F Jing
- Tsinghua University, Beijing 100084, People's Republic of China
| | | | - M Kavatsyuk
- KVI, University of Groningen, NL-9747 AA Groningen, Netherlands
| | - B Kloss
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - B Kopf
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - M Kornicer
- University of Hawaii, Honolulu, Hawaii 96822, USA
| | - W Kuehn
- Universitaet Giessen, D-35392 Giessen, Germany
| | - W Lai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J S Lange
- Universitaet Giessen, D-35392 Giessen, Germany
| | - M Lara
- Indiana University, Bloomington, Indiana 47405, USA
| | - P Larin
- Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - M Leyhe
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - C H Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Cheng Li
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Cui Li
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - D L Li
- Hunan University, Changsha 410082, People's Republic of China
| | - D M Li
- Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - F Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H B Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J C Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - K Li
- Hangzhou Normal University, Hangzhou 310036, People's Republic of China
| | - Lei Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - N Li
- GuangXi University, Nanning 530004, People's Republic of China
| | - P R Li
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Q J Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - W D Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - W G Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X L Li
- Shandong University, Jinan 250100, People's Republic of China
| | - X N Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X Q Li
- Nankai University, Tianjin 300071, People's Republic of China
| | - X R Li
- Seoul National University, Seoul 151-747, Korea
| | - Z B Li
- Sun Yat-Sen University, Guangzhou 510275, People's Republic of China
| | - H Liang
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Y F Liang
- Sichuan University, Chengdu 610064, People's Republic of China
| | - Y T Liang
- Universitaet Giessen, D-35392 Giessen, Germany
| | - G R Liao
- Tsinghua University, Beijing 100084, People's Republic of China
| | - D X Lin
- Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - B J Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C L Liu
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - C X Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - F H Liu
- Shanxi University, Taiyuan 030006, People's Republic of China
| | - Fang Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Feng Liu
- Central China Normal University, Wuhan 430079, People's Republic of China
| | - H B Liu
- GuangXi University, Nanning 530004, People's Republic of China
| | - H H Liu
- Henan University of Science and Technology, Luoyang 471003, People's Republic of China
| | - H M Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J P Liu
- WuhanUniversity, Wuhan 430072, People's Republic of China
| | - K Liu
- Tsinghua University, Beijing 100084, People's Republic of China
| | - K Y Liu
- Liaoning University, Shenyang 110036, People's Republic of China
| | - P L Liu
- Shandong University, Jinan 250100, People's Republic of China
| | - Q Liu
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - S B Liu
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - X Liu
- Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Y B Liu
- Nankai University, Tianjin 300071, People's Republic of China
| | - Z A Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Zhiqiang Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Zhiqing Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H Loehner
- KVI, University of Groningen, NL-9747 AA Groningen, Netherlands
| | - X C Lou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G R Lu
- Henan Normal University, Xinxiang 453007, People's Republic of China
| | - H J Lu
- Huangshan College, Huangshan 245000, People's Republic of China
| | - J G Lu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X R Lu
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Y P Lu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C L Luo
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - M X Luo
- Zhejiang University, Hangzhou 310027, People's Republic of China
| | - T Luo
- University of Hawaii, Honolulu, Hawaii 96822, USA
| | - X L Luo
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Lv
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - F C Ma
- Liaoning University, Shenyang 110036, People's Republic of China
| | - H L Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q M Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - T Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X Y Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - F E Maas
- Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - M Maggiora
- University of Turin, I-10125 Turin, Italy and INFN, I-10125 Turin, Italy
| | - Q A Malik
- University of the Punjab, Lahore-54590, Pakistan
| | - Y J Mao
- Peking University, Beijing 100871, People's Republic of China
| | - Z P Mao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | | | - J Min
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - T J Min
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - R E Mitchell
- Indiana University, Bloomington, Indiana 47405, USA
| | - X H Mo
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H Moeini
- KVI, University of Groningen, NL-9747 AA Groningen, Netherlands
| | - C MoralesMorales
- Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - K Moriya
- Indiana University, Bloomington, Indiana 47405, USA
| | - N Yu Muchnoi
- G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia
| | - H Muramatsu
- University of Rochester, Rochester, New York 14627, USA
| | - Y Nefedov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - I B Nikolaev
- G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia
| | - Z Ning
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S Nisar
- COMSATS Institute of Information Technology, Lahore, Defence Road, Off Raiwind Road, 54000 Lahore, Pakistan
| | - S L Olsen
- Seoul National University, Seoul 151-747, Korea
| | - Q Ouyang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S Pacetti
- INFN and University of Perugia, I-06100, Perugia, Italy
| | - J W Park
- University of Hawaii, Honolulu, Hawaii 96822, USA
| | - M Pelizaeus
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - H P Peng
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - K Peters
- GSI Helmholtzcentre for Heavy Ion Research GmbH, D-64291 Darmstadt, Germany
| | - J L Ping
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - R G Ping
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - R Poling
- University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - E Prencipe
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - M Qi
- Nanjing University, Nanjing 210093, People's Republic of China
| | - S Qian
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C F Qiao
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - L Q Qin
- Shandong University, Jinan 250100, People's Republic of China
| | - X S Qin
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y Qin
- Peking University, Beijing 100871, People's Republic of China
| | - Z H Qin
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J F Qiu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - K H Rashid
- University of the Punjab, Lahore-54590, Pakistan
| | - C F Redmer
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - M Ripka
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - G Rong
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X D Ruan
- GuangXi University, Nanning 530004, People's Republic of China
| | | | - S Schumann
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - W Shan
- Peking University, Beijing 100871, People's Republic of China
| | - M Shao
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - C P Shen
- Beihang University, Beijing 100191, People's Republic of China
| | - X Y Shen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H Y Sheng
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M R Shepherd
- Indiana University, Bloomington, Indiana 47405, USA
| | - W M Song
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X Y Song
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S Spataro
- University of Turin, I-10125 Turin, Italy and INFN, I-10125 Turin, Italy
| | - B Spruck
- Universitaet Giessen, D-35392 Giessen, Germany
| | - G X Sun
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J F Sun
- Henan Normal University, Xinxiang 453007, People's Republic of China
| | - S S Sun
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y J Sun
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Y Z Sun
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z J Sun
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z T Sun
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - C J Tang
- Sichuan University, Chengdu 610064, People's Republic of China
| | - X Tang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - I Tapan
- Uludag University, 16059 Bursa, Turkey
| | - E H Thorndike
- University of Rochester, Rochester, New York 14627, USA
| | - D Toth
- University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - M Ullrich
- Universitaet Giessen, D-35392 Giessen, Germany
| | - I Uman
- Dogus University, 34722 Istanbul, Turkey
| | - G S Varner
- University of Hawaii, Honolulu, Hawaii 96822, USA
| | - B Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - D Wang
- Peking University, Beijing 100871, People's Republic of China
| | - D Y Wang
- Peking University, Beijing 100871, People's Republic of China
| | - K Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L L Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L S Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Wang
- Shandong University, Jinan 250100, People's Republic of China
| | - P Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - P L Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q J Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S G Wang
- Peking University, Beijing 100871, People's Republic of China
| | - X F Wang
- Tsinghua University, Beijing 100084, People's Republic of China
| | - X L Wang
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Y D Wang
- INFN Laboratori Nazionali di Frascati, I-00044, Frascati, Italy
| | - Y F Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y Q Wang
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - Z Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z G Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z H Wang
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Z Y Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - D H Wei
- Guangxi Normal University, Guilin 541004, People's Republic of China
| | - J B Wei
- Peking University, Beijing 100871, People's Republic of China
| | - P Weidenkaff
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - Q G Wen
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - S P Wen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Werner
- Universitaet Giessen, D-35392 Giessen, Germany
| | - U Wiedner
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - L H Wu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - N Wu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S X Wu
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - W Wu
- Nankai University, Tianjin 300071, People's Republic of China
| | - Z Wu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L G Xia
- Tsinghua University, Beijing 100084, People's Republic of China
| | - Y X Xia
- Hunan University, Changsha 410082, People's Republic of China
| | - Z J Xiao
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - Y G Xie
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q L Xiu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G F Xu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q J Xu
- Hangzhou Normal University, Hangzhou 310036, People's Republic of China
| | - Q N Xu
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - X P Xu
- Seoul National University, Seoul 151-747, Korea and Soochow University, Suzhou 215006, People's Republic of China
| | - Z Xue
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L Yan
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - W B Yan
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - W C Yan
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Y H Yan
- Hunan University, Changsha 410082, People's Republic of China
| | - H X Yang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y Yang
- Central China Normal University, Wuhan 430079, People's Republic of China
| | - Y X Yang
- Guangxi Normal University, Guilin 541004, People's Republic of China
| | - Y Z Yang
- GuangXi University, Nanning 530004, People's Republic of China
| | - H Ye
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Ye
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M H Ye
- China Center of Advanced Science and Technology, Beijing 100190, People's Republic of China
| | - B X Yu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C X Yu
- Nankai University, Tianjin 300071, People's Republic of China
| | - H W Yu
- Peking University, Beijing 100871, People's Republic of China
| | - J S Yu
- Lanzhou University, Lanzhou 730000, People's Republic of China
| | - S P Yu
- Shandong University, Jinan 250100, People's Republic of China
| | - C Z Yuan
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - W L Yuan
- Nanjing University, Nanjing 210093, People's Republic of China
| | - Y Yuan
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - A A Zafar
- University of the Punjab, Lahore-54590, Pakistan
| | - A Zallo
- INFN Laboratori Nazionali di Frascati, I-00044, Frascati, Italy
| | - S L Zang
- Nanjing University, Nanjing 210093, People's Republic of China
| | - Y Zeng
- Hunan University, Changsha 410082, People's Republic of China
| | - B X Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - B Y Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C Zhang
- Nanjing University, Nanjing 210093, People's Republic of China
| | - C B Zhang
- Hunan University, Changsha 410082, People's Republic of China
| | - C C Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - D H Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H H Zhang
- Sun Yat-Sen University, Guangzhou 510275, People's Republic of China
| | - H Y Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J L Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J Q Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J W Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J Y Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J Z Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - LiLi Zhang
- Hunan University, Changsha 410082, People's Republic of China
| | - S H Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X J Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X Y Zhang
- Shandong University, Jinan 250100, People's Republic of China
| | - Y Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y H Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z P Zhang
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Z Y Zhang
- WuhanUniversity, Wuhan 430072, People's Republic of China
| | - Zhenghao Zhang
- Central China Normal University, Wuhan 430079, People's Republic of China
| | - G Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J W Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Lei Zhao
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Ling Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M G Zhao
- Nankai University, Tianjin 300071, People's Republic of China
| | - Q Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S J Zhao
- Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - T C Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X H Zhao
- Nanjing University, Nanjing 210093, People's Republic of China
| | - Y B Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z G Zhao
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - A Zhemchugov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - B Zheng
- University of South China, Hengyang 421001, People's Republic of China
| | - J P Zheng
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y H Zheng
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - B Zhong
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - L Zhou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X Zhou
- WuhanUniversity, Wuhan 430072, People's Republic of China
| | - X K Zhou
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - X R Zhou
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - K Zhu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - K J Zhu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X L Zhu
- Tsinghua University, Beijing 100084, People's Republic of China
| | - Y C Zhu
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Y S Zhu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z A Zhu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J Zhuang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - B S Zou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J H Zou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
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Ablikim M, Achasov MN, Albayrak O, Ambrose DJ, An FF, An Q, Bai JZ, Baldini Ferroli R, Ban Y, Becker J, Bennett JV, Bertani M, Bian JM, Boger E, Bondarenko O, Boyko I, Braun S, Briere RA, Bytev V, Cai H, Cai X, Cakir O, Calcaterra A, Cao GF, Cetin SA, Chang JF, Chelkov G, Chen G, Chen HS, Chen JC, Chen ML, Chen SJ, Chen XR, Chen YB, Cheng HP, Chu XK, Chu YP, Cronin-Hennessy D, Dai HL, Dai JP, Dedovich D, Deng ZY, Denig A, Denysenko I, Destefanis M, Ding WM, Ding Y, Dong LY, Dong MY, Du SX, Fang J, Fang SS, Fava L, Feng CQ, Friedel P, Fu CD, Fu JL, Fuks O, Gao Y, Geng C, Goetzen K, Gong WX, Gradl W, Greco M, Gu MH, Gu YT, Guan YH, Guo AQ, Guo LB, Guo T, Guo YP, Han YL, Harris FA, He KL, He M, He ZY, Held T, Heng YK, Hou ZL, Hu C, Hu HM, Hu JF, Hu T, Huang GM, Huang GS, Huang JS, Huang L, Huang XT, Huang Y, Hussain T, Ji CS, Ji Q, Ji QP, Ji XB, Ji XL, Jiang LL, Jiang XS, Jiao JB, Jiao Z, Jin DP, Jin S, Jing FF, Kalantar-Nayestanaki N, Kavatsyuk M, Kloss B, Kopf B, Kornicer M, Kuehn W, Lai W, Lange JS, Lara M, Larin P, Leyhe M, Li CH, Li C, Li C, Li DL, Li DM, Li F, Li G, Li HB, Li JC, Li K, Li L, Li N, Li PR, Li QJ, Li WD, Li WG, Li XL, Li XN, Li XQ, Li XR, Li ZB, Liang H, Liang YF, Liang YT, Liao GR, Lin DX, Liu BJ, Liu CL, Liu CX, Liu FH, Liu F, Liu F, Liu HB, Liu HH, Liu HM, Liu JP, Liu K, Liu KY, Liu PL, Liu Q, Liu SB, Liu X, Liu YB, Liu ZA, Liu Z, Liu Z, Loehner H, Lou XC, Lu GR, Lu HJ, Lu JG, Lu XR, Lu YP, Luo CL, Luo MX, Luo T, Luo XL, Lv M, Ma FC, Ma HL, Ma QM, Ma S, Ma T, Ma XY, Maas FE, Maggiora M, Malik QA, Mao YJ, Mao ZP, Messchendorp JG, Min J, Min TJ, Mitchell RE, Mo XH, Moeini H, Morales Morales C, Moriya K, Muchnoi NY, Muramatsu H, Nefedov Y, Nikolaev IB, Ning Z, Nisar S, Olsen SL, Ouyang Q, Pacetti S, Park JW, Pelizaeus M, Peng HP, Peters K, Ping JL, Ping RG, Poling R, Prencipe E, Qi M, Qian S, Qiao CF, Qin LQ, Qin XS, Qin Y, Qin ZH, Qiu JF, Rashid KH, Redmer CF, Ripka M, Rong G, Ruan XD, Sarantsev A, Schumann S, Shan W, Shao M, Shen CP, Shen XY, Sheng HY, Shepherd MR, Song WM, Song XY, Spataro S, Spruck B, Sun GX, Sun JF, Sun SS, Sun YJ, Sun YZ, Sun ZJ, Sun ZT, Tang CJ, Tang X, Tapan I, Thorndike EH, Toth D, Ullrich M, Uman I, Varner GS, Wang B, Wang D, Wang DY, Wang K, Wang LL, Wang LS, Wang M, Wang P, Wang PL, Wang QJ, Wang SG, Wang XF, Wang XL, Wang YD, Wang YF, Wang YQ, Wang Z, Wang ZG, Wang ZH, Wang ZY, Wei DH, Wei JB, Weidenkaff P, Wen QG, Wen SP, Werner M, Wiedner U, Wu LH, Wu N, Wu SX, Wu W, Wu Z, Xia LG, Xia YX, Xiao ZJ, Xie YG, Xiu QL, Xu GF, Xu QJ, Xu QN, Xu XP, Xu ZR, Xue Z, Yan L, Yan WB, Yan WC, Yan YH, Yang HX, Yang Y, Yang YX, Yang YZ, Ye H, Ye M, Ye MH, Yu BX, Yu CX, Yu HW, Yu JS, Yu SP, Yuan CZ, Yuan WL, Yuan Y, Zafar AA, Zallo A, Zang SL, Zeng Y, Zhang BX, Zhang BY, Zhang C, Zhang CB, Zhang CC, Zhang DH, Zhang HH, Zhang HY, Zhang JQ, Zhang JW, Zhang JY, Zhang JZ, Zhang L, Zhang SH, Zhang XJ, Zhang XY, Zhang Y, Zhang YH, Zhang ZP, Zhang ZY, Zhang Z, Zhao G, Zhao JW, Zhao L, Zhao L, Zhao MG, Zhao Q, Zhao SJ, Zhao TC, Zhao XH, Zhao YB, Zhao ZG, Zhemchugov A, Zheng B, Zheng JP, Zheng YH, Zhong B, Zhou L, Zhou X, Zhou XK, Zhou XR, Zhu K, Zhu KJ, Zhu XL, Zhu YC, Zhu YS, Zhu ZA, Zhuang J, Zou BS, Zou JH. Observation of a charged charmoniumlike structure Zc(4020) and search for the Zc(3900) in e+e-→π+π-hc. Phys Rev Lett 2013; 111:242001. [PMID: 24483645 DOI: 10.1103/physrevlett.111.242001] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2013] [Indexed: 06/03/2023]
Abstract
We study e+e-→π+π-hc at center-of-mass energies from 3.90 to 4.42 GeV by using data samples collected with the BESIII detector operating at the Beijing Electron Positron Collider. The Born cross sections are measured at 13 energies and are found to be of the same order of magnitude as those of e+e-→π+π-J/ψ but with a different line shape. In the π±hc mass spectrum, a distinct structure, referred to as Zc(4020), is observed at 4.02 GeV/c2. The Zc(4020) carries an electric charge and couples to charmonium. A fit to the π±hc invariant mass spectrum, neglecting possible interferences, results in a mass of (4022.9±0.8±2.7) MeV/c2 and a width of (7.9±2.7±2.6) MeV for the Zc(4020), where the first errors are statistical and the second systematic. The difference between the parameters of this structure and the Zc(4025) observed in the D*D[over ¯]* final state is within 1.5σ, but whether they are the same state needs further investigation. No significant Zc(3900) signal is observed, and upper limits on the Zc(3900) production cross sections in π±hc at center-of-mass energies of 4.23 and 4.26 GeV are set.
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Affiliation(s)
- M Ablikim
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M N Achasov
- G. I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia
| | - O Albayrak
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - D J Ambrose
- University of Rochester, Rochester, New York 14627, USA
| | - F F An
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q An
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - J Z Bai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | | | - Y Ban
- Peking University, Beijing 100871, People's Republic of China
| | - J Becker
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - J V Bennett
- Indiana University, Bloomington, Indiana 47405, USA
| | - M Bertani
- INFN Laboratori Nazionali di Frascati, I-00044, Frascati, Italy
| | - J M Bian
- University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - E Boger
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - O Bondarenko
- KVI, University of Groningen, NL-9747 AA Groningen, Netherlands
| | - I Boyko
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - S Braun
- Universitaet Giessen, D-35392 Giessen, Germany
| | - R A Briere
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - V Bytev
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - H Cai
- Wuhan University, Wuhan 430072, People's Republic of China
| | - X Cai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - O Cakir
- Ankara University, Dogol Caddesi, 06100 Tandogan, Ankara, Turkey
| | - A Calcaterra
- INFN Laboratori Nazionali di Frascati, I-00044, Frascati, Italy
| | - G F Cao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S A Cetin
- Dogus University, 34722 Istanbul, Turkey
| | - J F Chang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G Chelkov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - G Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H S Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J C Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M L Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S J Chen
- Nanjing University, Nanjing 210093, People's Republic of China
| | - X R Chen
- Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Y B Chen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H P Cheng
- Huangshan College, Huangshan 245000, People's Republic of China
| | - X K Chu
- Peking University, Beijing 100871, People's Republic of China
| | - Y P Chu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | | | - H L Dai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J P Dai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - D Dedovich
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - Z Y Deng
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - A Denig
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - I Denysenko
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - M Destefanis
- University of Turin, I-10125, Turin, Italy and INFN, I-10125, Turin, Italy
| | - W M Ding
- Shandong University, Jinan 250100, People's Republic of China
| | - Y Ding
- Liaoning University, Shenyang 110036, People's Republic of China
| | - L Y Dong
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Y Dong
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S X Du
- Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - J Fang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S S Fang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L Fava
- University of Eastern Piedmont, I-15121 Alessandria, Italy and INFN, I-10125, Turin, Italy
| | - C Q Feng
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - P Friedel
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - C D Fu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J L Fu
- Nanjing University, Nanjing 210093, People's Republic of China
| | - O Fuks
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - Y Gao
- Tsinghua University, Beijing 100084, People's Republic of China
| | - C Geng
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - K Goetzen
- GSI Helmholtzcentre for Heavy Ion Research GmbH, D-64291 Darmstadt, Germany
| | - W X Gong
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - W Gradl
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - M Greco
- University of Turin, I-10125, Turin, Italy and INFN, I-10125, Turin, Italy
| | - M H Gu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y T Gu
- GuangXi University, Nanning 530004, People's Republic of China
| | - Y H Guan
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - A Q Guo
- Nankai University, Tianjin 300071, People's Republic of China
| | - L B Guo
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - T Guo
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - Y P Guo
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany and Nankai University, Tianjin 300071, People's Republic of China
| | - Y L Han
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - F A Harris
- University of Hawaii, Honolulu, Hawaii 96822, USA
| | - K L He
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M He
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z Y He
- Nankai University, Tianjin 300071, People's Republic of China
| | - T Held
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - Y K Heng
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z L Hou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C Hu
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - H M Hu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J F Hu
- Universitaet Giessen, D-35392 Giessen, Germany
| | - T Hu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G M Huang
- Central China Normal University, Wuhan 430079, People's Republic of China
| | - G S Huang
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - J S Huang
- Henan Normal University, Xinxiang 453007, People's Republic of China
| | - L Huang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X T Huang
- Shandong University, Jinan 250100, People's Republic of China
| | - Y Huang
- Nanjing University, Nanjing 210093, People's Republic of China
| | - T Hussain
- University of the Punjab, Lahore-54590, Pakistan
| | - C S Ji
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Q Ji
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q P Ji
- Nankai University, Tianjin 300071, People's Republic of China
| | - X B Ji
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X L Ji
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L L Jiang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X S Jiang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J B Jiao
- Shandong University, Jinan 250100, People's Republic of China
| | - Z Jiao
- Huangshan College, Huangshan 245000, People's Republic of China
| | - D P Jin
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S Jin
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - F F Jing
- Tsinghua University, Beijing 100084, People's Republic of China
| | | | - M Kavatsyuk
- KVI, University of Groningen, NL-9747 AA Groningen, Netherlands
| | - B Kloss
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - B Kopf
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - M Kornicer
- University of Hawaii, Honolulu, Hawaii 96822, USA
| | - W Kuehn
- Universitaet Giessen, D-35392 Giessen, Germany
| | - W Lai
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J S Lange
- Universitaet Giessen, D-35392 Giessen, Germany
| | - M Lara
- Indiana University, Bloomington, Indiana 47405, USA
| | - P Larin
- Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - M Leyhe
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - C H Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Cheng Li
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Cui Li
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - D L Li
- Hunan University, Changsha 410082, People's Republic of China
| | - D M Li
- Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - F Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H B Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J C Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - K Li
- Hangzhou Normal University, Hangzhou 310036, People's Republic of China
| | - Lei Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - N Li
- GuangXi University, Nanning 530004, People's Republic of China
| | - P R Li
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Q J Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - W D Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - W G Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X L Li
- Shandong University, Jinan 250100, People's Republic of China
| | - X N Li
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X Q Li
- Nankai University, Tianjin 300071, People's Republic of China
| | - X R Li
- Seoul National University, Seoul, 151-747 Korea
| | - Z B Li
- Sun Yat-Sen University, Guangzhou 510275, People's Republic of China
| | - H Liang
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Y F Liang
- Sichuan University, Chengdu 610064, People's Republic of China
| | - Y T Liang
- Universitaet Giessen, D-35392 Giessen, Germany
| | - G R Liao
- Tsinghua University, Beijing 100084, People's Republic of China
| | - D X Lin
- Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - B J Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C L Liu
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - C X Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - F H Liu
- Shanxi University, Taiyuan 030006, People's Republic of China
| | - Fang Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Feng Liu
- Central China Normal University, Wuhan 430079, People's Republic of China
| | - H B Liu
- GuangXi University, Nanning 530004, People's Republic of China
| | - H H Liu
- Henan University of Science and Technology, Luoyang 471003, People's Republic of China
| | - H M Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J P Liu
- Wuhan University, Wuhan 430072, People's Republic of China
| | - K Liu
- Tsinghua University, Beijing 100084, People's Republic of China
| | - K Y Liu
- Liaoning University, Shenyang 110036, People's Republic of China
| | - P L Liu
- Shandong University, Jinan 250100, People's Republic of China
| | - Q Liu
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - S B Liu
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - X Liu
- Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Y B Liu
- Nankai University, Tianjin 300071, People's Republic of China
| | - Z A Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Zhiqiang Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Zhiqing Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H Loehner
- KVI, University of Groningen, NL-9747 AA Groningen, Netherlands
| | - X C Lou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G R Lu
- Henan Normal University, Xinxiang 453007, People's Republic of China
| | - H J Lu
- Huangshan College, Huangshan 245000, People's Republic of China
| | - J G Lu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X R Lu
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Y P Lu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C L Luo
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - M X Luo
- Zhejiang University, Hangzhou 310027, People's Republic of China
| | - T Luo
- University of Hawaii, Honolulu, Hawaii 96822, USA
| | - X L Luo
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Lv
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - F C Ma
- Liaoning University, Shenyang 110036, People's Republic of China
| | - H L Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q M Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - T Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X Y Ma
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - F E Maas
- Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - M Maggiora
- University of Turin, I-10125, Turin, Italy and INFN, I-10125, Turin, Italy
| | - Q A Malik
- University of the Punjab, Lahore-54590, Pakistan
| | - Y J Mao
- Peking University, Beijing 100871, People's Republic of China
| | - Z P Mao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | | | - J Min
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - T J Min
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - R E Mitchell
- Indiana University, Bloomington, Indiana 47405, USA
| | - X H Mo
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H Moeini
- KVI, University of Groningen, NL-9747 AA Groningen, Netherlands
| | - C Morales Morales
- Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - K Moriya
- Indiana University, Bloomington, Indiana 47405, USA
| | - N Yu Muchnoi
- G. I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia
| | - H Muramatsu
- University of Rochester, Rochester, New York 14627, USA
| | - Y Nefedov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - I B Nikolaev
- G. I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia
| | - Z Ning
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S Nisar
- COMSATS Institute of Information Technology, Lahore, Defence Road, Off Raiwind Road, 54000 Lahore, Pakistan
| | - S L Olsen
- Seoul National University, Seoul, 151-747 Korea
| | - Q Ouyang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S Pacetti
- INFN and University of Perugia, I-06100, Perugia, Italy
| | - J W Park
- University of Hawaii, Honolulu, Hawaii 96822, USA
| | - M Pelizaeus
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - H P Peng
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - K Peters
- GSI Helmholtzcentre for Heavy Ion Research GmbH, D-64291 Darmstadt, Germany
| | - J L Ping
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - R G Ping
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - R Poling
- University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - E Prencipe
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - M Qi
- Nanjing University, Nanjing 210093, People's Republic of China
| | - S Qian
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C F Qiao
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - L Q Qin
- Shandong University, Jinan 250100, People's Republic of China
| | - X S Qin
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y Qin
- Peking University, Beijing 100871, People's Republic of China
| | - Z H Qin
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J F Qiu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - K H Rashid
- University of the Punjab, Lahore-54590, Pakistan
| | - C F Redmer
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - M Ripka
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - G Rong
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X D Ruan
- GuangXi University, Nanning 530004, People's Republic of China
| | - A Sarantsev
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - S Schumann
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - W Shan
- Peking University, Beijing 100871, People's Republic of China
| | - M Shao
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - C P Shen
- Beihang University, Beijing 100191, People's Republic of China
| | - X Y Shen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H Y Sheng
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M R Shepherd
- Indiana University, Bloomington, Indiana 47405, USA
| | - W M Song
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X Y Song
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S Spataro
- University of Turin, I-10125, Turin, Italy and INFN, I-10125, Turin, Italy
| | - B Spruck
- Universitaet Giessen, D-35392 Giessen, Germany
| | - G X Sun
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J F Sun
- Henan Normal University, Xinxiang 453007, People's Republic of China
| | - S S Sun
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y J Sun
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Y Z Sun
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z J Sun
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z T Sun
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - C J Tang
- Sichuan University, Chengdu 610064, People's Republic of China
| | - X Tang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - I Tapan
- Uludag University, 16059 Bursa, Turkey
| | - E H Thorndike
- University of Rochester, Rochester, New York 14627, USA
| | - D Toth
- University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - M Ullrich
- Universitaet Giessen, D-35392 Giessen, Germany
| | - I Uman
- Dogus University, 34722 Istanbul, Turkey
| | - G S Varner
- University of Hawaii, Honolulu, Hawaii 96822, USA
| | - B Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - D Wang
- Peking University, Beijing 100871, People's Republic of China
| | - D Y Wang
- Peking University, Beijing 100871, People's Republic of China
| | - K Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L L Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L S Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Wang
- Shandong University, Jinan 250100, People's Republic of China
| | - P Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - P L Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q J Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S G Wang
- Peking University, Beijing 100871, People's Republic of China
| | - X F Wang
- Tsinghua University, Beijing 100084, People's Republic of China
| | - X L Wang
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Y D Wang
- INFN Laboratori Nazionali di Frascati, I-00044, Frascati, Italy
| | - Y F Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y Q Wang
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - Z Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z G Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z H Wang
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Z Y Wang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - D H Wei
- Guangxi Normal University, Guilin 541004, People's Republic of China
| | - J B Wei
- Peking University, Beijing 100871, People's Republic of China
| | - P Weidenkaff
- Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
| | - Q G Wen
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - S P Wen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Werner
- Universitaet Giessen, D-35392 Giessen, Germany
| | - U Wiedner
- Bochum Ruhr-University, D-44780 Bochum, Germany
| | - L H Wu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - N Wu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S X Wu
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - W Wu
- Nankai University, Tianjin 300071, People's Republic of China
| | - Z Wu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L G Xia
- Tsinghua University, Beijing 100084, People's Republic of China
| | - Y X Xia
- Hunan University, Changsha 410082, People's Republic of China
| | - Z J Xiao
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - Y G Xie
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q L Xiu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - G F Xu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q J Xu
- Hangzhou Normal University, Hangzhou 310036, People's Republic of China
| | - Q N Xu
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - X P Xu
- Soochow University, Suzhou 215006, People's Republic of China
| | - Z R Xu
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Z Xue
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - L Yan
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - W B Yan
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - W C Yan
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Y H Yan
- Hunan University, Changsha 410082, People's Republic of China
| | - H X Yang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y Yang
- Central China Normal University, Wuhan 430079, People's Republic of China
| | - Y X Yang
- Guangxi Normal University, Guilin 541004, People's Republic of China
| | - Y Z Yang
- GuangXi University, Nanning 530004, People's Republic of China
| | - H Ye
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M Ye
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M H Ye
- China Center of Advanced Science and Technology, Beijing 100190, People's Republic of China
| | - B X Yu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C X Yu
- Nankai University, Tianjin 300071, People's Republic of China
| | - H W Yu
- Peking University, Beijing 100871, People's Republic of China
| | - J S Yu
- Lanzhou University, Lanzhou 730000, People's Republic of China
| | - S P Yu
- Shandong University, Jinan 250100, People's Republic of China
| | - C Z Yuan
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - W L Yuan
- Nanjing University, Nanjing 210093, People's Republic of China
| | - Y Yuan
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - A A Zafar
- University of the Punjab, Lahore-54590, Pakistan
| | - A Zallo
- INFN Laboratori Nazionali di Frascati, I-00044, Frascati, Italy
| | - S L Zang
- Nanjing University, Nanjing 210093, People's Republic of China
| | - Y Zeng
- Hunan University, Changsha 410082, People's Republic of China
| | - B X Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - B Y Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - C Zhang
- Nanjing University, Nanjing 210093, People's Republic of China
| | - C B Zhang
- Hunan University, Changsha 410082, People's Republic of China
| | - C C Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - D H Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - H H Zhang
- Sun Yat-Sen University, Guangzhou 510275, People's Republic of China
| | - H Y Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J Q Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J W Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J Y Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J Z Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - LiLi Zhang
- Hunan University, Changsha 410082, People's Republic of China
| | - S H Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X J Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X Y Zhang
- Shandong University, Jinan 250100, People's Republic of China
| | - Y Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y H Zhang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z P Zhang
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Z Y Zhang
- Wuhan University, Wuhan 430072, People's Republic of China
| | - Zhenghao Zhang
- Central China Normal University, Wuhan 430079, People's Republic of China
| | - G Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J W Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Lei Zhao
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Ling Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M G Zhao
- Nankai University, Tianjin 300071, People's Republic of China
| | - Q Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - S J Zhao
- Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - T C Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X H Zhao
- Nanjing University, Nanjing 210093, People's Republic of China
| | - Y B Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z G Zhao
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - A Zhemchugov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - B Zheng
- University of South China, Hengyang 421001, People's Republic of China
| | - J P Zheng
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Y H Zheng
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - B Zhong
- Nanjing Normal University, Nanjing 210023, People's Republic of China
| | - L Zhou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X Zhou
- Wuhan University, Wuhan 430072, People's Republic of China
| | - X K Zhou
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - X R Zhou
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - K Zhu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - K J Zhu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X L Zhu
- Tsinghua University, Beijing 100084, People's Republic of China
| | - Y C Zhu
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Y S Zhu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Z A Zhu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J Zhuang
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - B S Zou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - J H Zou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
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14
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Wei S, Sun J, Li J, Wang L, Hall CL, Dix TA, Mohamad O, Wei L, Yu SP. Acute and delayed protective effects of pharmacologically induced hypothermia in an intracerebral hemorrhage stroke model of mice. Neuroscience 2013; 252:489-500. [PMID: 23912033 DOI: 10.1016/j.neuroscience.2013.07.052] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Revised: 07/16/2013] [Accepted: 07/18/2013] [Indexed: 12/21/2022]
Abstract
Hemorrhagic stroke, including intracerebral hemorrhage (ICH), is a devastating subtype of stroke; yet, effective clinical treatment is very limited. Accumulating evidence has shown that mild to moderate hypothermia is a promising intervention for ischemic stroke and ICH. Current physical cooling methods, however, are less efficient and often impractical for acute ICH patients. The present investigation tested pharmacologically induced hypothermia (PIH) using the second-generation neurotensin receptor (NTR) agonist HPI-201 (formerly known as ABS-201) in an adult mouse model with ICH. Acute or delayed administrations of HPI-201 (2mg/kg bolus injection followed by 2 injections of 1mg/kg, i.p.) were initiated at 1 or 24h after ICH. HPI-201 induced mild hypothermia within 30 min and body and brain temperatures were maintained at 32.7 ± 0.4°C for at least 6h without causing observable shivering. With the 1-h delayed treatment, HPI-201-induced PIH significantly reduced ICH-induced cell death and brain edema compared to saline-treated ICH animals. When HPI-201-induced hypothermia was initiated 24h after the onset of ICH, it still significantly attenuated brain edema, cell death and blood-brain barrier breakdown. HPI-201 significantly decreased the expression of matrix metallopeptidase-9 (MMP-9), reduced caspase-3 activation, and increased Bcl-2 expression in the ICH brain. Moreover, ICH mice received 1-h delayed HPI-201 treatment performed significantly better in the neurological behavior test 48 h after ICH. All together, these data suggest that systemic injection of HPI-201 is an effective hypothermic strategy that protects the brain from ICH injury with a wide therapeutic window. The protective effect of this PIH therapy is partially mediated through the alleviation of apoptosis and neurovascular damage. We suggest that pharmacological hypothermia using the newly developed neurotensin analogs is a promising therapeutic treatment for ICH.
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Affiliation(s)
- S Wei
- Department of Anesthesiology, Emory University School of Medicine, Atlanta, GA 30322, United States
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15
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Ablikim M, Achasov MN, Ai XC, Albayrak O, Ambrose DJ, An FF, An Q, Bai JZ, Baldini Ferroli R, Ban Y, Becker J, Bennett JV, Bertani M, Bian JM, Boger E, Bondarenko O, Boyko I, Briere RA, Bytev V, Cai H, Cai X, Cakir O, Calcaterra A, Cao GF, Cetin SA, Chang JF, Chelkov G, Chen G, Chen HS, Chen JC, Chen ML, Chen SJ, Chen X, Chen YB, Cheng HP, Chu YP, Cronin-Hennessy D, Dai HL, Dai JP, Dedovich D, Deng ZY, Denig A, Denysenko I, Destefanis M, Ding WM, Ding Y, Dong LY, Dong MY, Du SX, Fang J, Fang SS, Fava L, Feng CQ, Friedel P, Fu CD, Fu JL, Fuks O, Gao Q, Gao Y, Geng C, Goetzen K, Gong WX, Gradl W, Greco M, Gu MH, Gu YT, Guan YH, Guo AQ, Guo LB, Guo T, Guo YP, Han YL, Harris FA, He KL, He M, He ZY, Held T, Heng YK, Hou ZL, Hu C, Hu HM, Hu JF, Hu T, Huang GM, Huang GS, Huang JS, Huang L, Huang XT, Huang Y, Huang YP, Hussain T, Ji CS, Ji Q, Ji QP, Ji XB, Ji XL, Jiang LL, Jiang XS, Jiao JB, Jiao Z, Jin DP, Jin S, Jing FF, Kalantar-Nayestanaki N, Kavatsyuk M, Kopf B, Kornicer M, Kühn W, Lai W, Lange JS, Lara M, Larin P, Leyhe M, Li CH, Li C, Li C, Li DM, Li F, Li G, Li HB, Li JC, Li K, Li L, Li QJ, Li SL, Li WD, Li WG, Li XL, Li XN, Li XQ, Li XR, Li ZB, Liang H, Liang YF, Liang YT, Liao GR, Liao XT, Lin D, Liu BJ, Liu CL, Liu CX, Liu FH, Liu F, Liu F, Liu H, Liu HB, Liu HH, Liu HM, Liu HW, Liu JP, Liu K, Liu KY, Liu K, Liu PL, Liu Q, Liu SB, Liu X, Liu YB, Liu ZA, Liu Z, Liu Z, Loehner H, Lou XC, Lu GR, Lu HJ, Lu JG, Lu QW, Lu XR, Lu YP, Luo CL, Luo MX, Luo T, Luo XL, Lv M, Ma CL, Ma FC, Ma HL, Ma QM, Ma S, Ma T, Ma XY, Maas FE, Maggiora M, Malik QA, Mao YJ, Mao ZP, Messchendorp JG, Min J, Min TJ, Mitchell RE, Mo XH, Mo YJ, Moeini H, Morales Morales C, Moriya K, Muchnoi NY, Muramatsu H, Nefedov Y, Nicholson C, Nikolaev IB, Ning Z, Olsen SL, Ouyang Q, Pacetti S, Park JW, Pelizaeus M, Peng HP, Peters K, Ping JL, Ping RG, Poling R, Prencipe E, Qi M, Qian S, Qiao CF, Qin LQ, Qin XS, Qin Y, Qin ZH, Qiu JF, Rashid KH, Rong G, Ruan XD, Sarantsev A, Schaefer BD, Shao M, Shen CP, Shen XY, Sheng HY, Shepherd MR, Song WM, Song XY, Spataro S, Spruck B, Sun DH, Sun GX, Sun JF, Sun SS, Sun YJ, Sun YZ, Sun ZJ, Sun ZT, Tang CJ, Tang X, Tapan I, Thorndike EH, Toth D, Ullrich M, Uman I, Varner GS, Wang BQ, Wang D, Wang DY, Wang K, Wang LL, Wang LS, Wang M, Wang P, Wang PL, Wang QJ, Wang SG, Wang XF, Wang XL, Wang YD, Wang YF, Wang YQ, Wang Z, Wang ZG, Wang ZY, Wei DH, Wei JB, Weidenkaff P, Wen QG, Wen SP, Werner M, Wiedner U, Wu LH, Wu N, Wu SX, Wu W, Wu Z, Xia LG, Xia YX, Xiao ZJ, Xie YG, Xiu QL, Xu GF, Xu GM, Xu QJ, Xu QN, Xu XP, Xu ZR, Xue F, Xue Z, Yan L, Yan WB, Yan YH, Yang HX, Yang Y, Yang YX, Ye H, Ye M, Ye MH, Yu BX, Yu CX, Yu HW, Yu JS, Yu SP, Yuan CZ, Yuan Y, Zafar AA, Zallo A, Zang SL, Zeng Y, Zhang BX, Zhang BY, Zhang C, Zhang CC, Zhang DH, Zhang HH, Zhang HY, Zhang JQ, Zhang JW, Zhang JY, Zhang JZ, Zhang L, Zhang R, Zhang SH, Zhang XJ, Zhang XY, Zhang Y, Zhang YH, Zhang ZP, Zhang ZY, Zhang Z, Zhao G, Zhao HS, Zhao JW, Zhao KX, Zhao L, Zhao L, Zhao MG, Zhao Q, Zhao SJ, Zhao TC, Zhao XH, Zhao YB, Zhao ZG, Zhemchugov A, Zheng B, Zheng JP, Zheng YH, Zhong B, Zhou L, Zhou X, Zhou XK, Zhou XR, Zhu C, Zhu K, Zhu KJ, Zhu SH, Zhu XL, Zhu YC, Zhu YM, Zhu YS, Zhu ZA, Zhuang J, Zou BS, Zou JH. Observation of a charged charmoniumlike structure in e+ e- → π+ π- J/ψ at sqrt[s] = 4.26 GeV. Phys Rev Lett 2013; 110:252001. [PMID: 23829729 DOI: 10.1103/physrevlett.110.252001] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2013] [Indexed: 06/02/2023]
Abstract
We study the process ee+ e- → π+ π- J/ψ at a center-of-mass energy of 4.260 GeV using a 525 pb(-1) data sample collected with the BESIII detector operating at the Beijing Electron Positron Collider. The Born cross section is measured to be (62.9±1.9±3.7) pb, consistent with the production of the Y(4260). We observe a structure at around 3.9 GeV/c2 in the π(±)J/ψ mass spectrum, which we refer to as the Z(c)(3900). If interpreted as a new particle, it is unusual in that it carries an electric charge and couples to charmonium. A fit to the π(±)J/ψ invariant mass spectrum, neglecting interference, results in a mass of (3899.0±3.6±4.9) MeV/c2 and a width of (46±10±20) MeV. Its production ratio is measured to be R = (σ(e+ e- → π(±)Z(c)(3900)(∓) → π+ π- J/ψ)/σ(e+ e- → π+ π- J/ψ)) = (21.5±3.3±7.5)%. In all measurements the first errors are statistical and the second are systematic.
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Affiliation(s)
- M Ablikim
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
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16
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Li WL, Yu SP, Chen D, Yu SS, Jiang YJ, Genetta T, Wei L. The regulatory role of NF-κB in autophagy-like cell death after focal cerebral ischemia in mice. Neuroscience 2013; 244:16-30. [PMID: 23558089 DOI: 10.1016/j.neuroscience.2013.03.045] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2012] [Revised: 03/20/2013] [Accepted: 03/21/2013] [Indexed: 12/11/2022]
Abstract
Autophagy may contribute to ischemia-induced cell death in the brain, but the regulation of autophagic cell death is largely unknown. Nuclear factor kappa B (NF-κB) is a regulator of apoptosis in cerebral ischemia. We examined the hypothesis that autophagy-like cell death could contribute to ischemia-induced brain damage and the process was regulated by NF-κB. In adult wild-type (WT) and NF-κB p50 knockout (p50(-/-)) mice, focal ischemia in the barrel cortex was induced by ligation of distal branches of the middle cerebral artery. Twelve to 24h later, autophagic activity increased as indicated by enhanced expression of Beclin-1 and LC3 in the ischemic core and/or penumbra regions. This increased autophagy contributed to cell injury, evidenced by terminal deoxynucleotidyltransferase (TdT)-mediated dUTP-biotin nick end labeling (TUNEL) co-staining and a protective effect achieved by the autophagy inhibitor 3-methyladenine. The number of Beclin-1/TUNEL-positive cells was significantly more in p50(-/-) mice than in WT mice. Neuronal and vascular cell death, as determined by TUNEL-positive cells co-staining with NeuN or Collagen IV, was more abundant in p50(-/-) mice. Immunostaining of the endothelial cell tight junction marker occludin revealed more damage to the blood-brain barrier in p50(-/-) mice. Western blotting of the peri-infarct tissue showed a reduction of Akt-the mammalian target of rapamycin (mTOR) signaling in p50(-/-) mice after ischemia. These findings provide the first evidence that cerebral ischemia induced autophagy-like injury is regulated by the NF-κB pathway, which may suggest potential treatments for ischemic stroke.
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Affiliation(s)
- W-L Li
- Department of Anesthesiology, Emory University School of Medicine, Atlanta, GA 30322, USA
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Ablikim M, Achasov MN, Ambrose DJ, An FF, An Q, An ZH, Bai JZ, Ban Y, Becker J, Berger N, Bertani M, Bian JM, Boger E, Bondarenko O, Boyko I, Briere RA, Bytev V, Cai X, Calcaterra A, Cao GF, Chang JF, Chelkov G, Chen G, Chen HS, Chen JC, Chen ML, Chen SJ, Chen Y, Chen YB, Cheng HP, Chu YP, Cronin-Hennessy D, Dai HL, Dai JP, Dedovich D, Deng ZY, Denig A, Denysenko I, Destefanis M, Ding WM, Ding Y, Dong LY, Dong MY, Du SX, Fang J, Fang SS, Fava L, Feldbauer F, Feng CQ, Ferroli RB, Fu CD, Fu JL, Gao Y, Geng C, Goetzen K, Gong WX, Gradl W, Greco M, Gu MH, Gu YT, Guan YH, Guo AQ, Guo LB, Guo YP, Han YL, Hao XQ, Harris FA, He KL, He M, He ZY, Held T, Heng YK, Hou ZL, Hu HM, Hu JF, Hu T, Huang B, Huang GM, Huang JS, Huang XT, Huang YP, Hussain T, Ji CS, Ji Q, Ji XB, Ji XL, Jia LK, Jiang LL, Jiang XS, Jiao JB, Jiao Z, Jin DP, Jin S, Jing FF, Kalantar-Nayestanaki N, Kavatsyuk M, Kühn W, Lai W, Lange JS, Leung JKC, Li CH, Li C, Li C, Li DM, Li F, Li G, Li HB, Li JC, Li K, Li L, Li NB, Li QJ, Li SL, Li WD, Li WG, Li XL, Li XN, Li XQ, Li XR, Li ZB, Liang H, Liang YF, Liang YT, Liao GR, Liao XT, Liu BJ, Liu BJ, Liu CL, Liu CX, Liu CY, Liu FH, Liu F, Liu F, Liu H, Liu HB, Liu HH, Liu HM, Liu HW, Liu JP, Liu KY, Liu K, Liu K, Liu PL, Liu SB, Liu X, Liu XH, Liu Y, Liu YB, Liu ZA, Liu Z, Liu Z, Loehner H, Lu GR, Lu HJ, Lu JG, Lu QW, Lu XR, Lu YP, Luo CL, Luo MX, Luo T, Luo XL, Lv M, Ma CL, Ma FC, Ma HL, Ma QM, Ma S, Ma T, Ma XY, Ma Y, Maas FE, Maggiora M, Malik QA, Mao H, Mao YJ, Mao ZP, Messchendorp JG, Min J, Min TJ, Mitchell RE, Mo XH, Morales Morales C, Motzko C, Muchnoi NY, Nefedov Y, Nicholson C, Nikolaev IB, Ning Z, Olsen SL, Ouyang Q, Pacetti S, Park JW, Pelizaeus M, Peters K, Ping JL, Ping RG, Poling R, Prencipe E, Pun CSJ, Qi M, Qian S, Qiao CF, Qin XS, Qin Y, Qin ZH, Qiu JF, Rashid KH, Rong G, Ruan XD, Sarantsev A, Schulze J, Shao M, Shen CP, Shen XY, Sheng HY, Shepherd MR, Song XY, Spataro S, Spruck B, Sun DH, Sun GX, Sun JF, Sun SS, Sun XD, Sun YJ, Sun YZ, Sun ZJ, Sun ZT, Tang CJ, Tang X, Thorndike EH, Tian HL, Toth D, Ullrich M, Varner GS, Wang B, Wang BQ, Wang JX, Wang K, Wang LL, Wang LS, Wang M, Wang P, Wang PL, Wang Q, Wang QJ, Wang SG, Wang XF, Wang XL, Wang YD, Wang YF, Wang YQ, Wang Z, Wang ZG, Wang ZY, Wei DH, Weidenkaff P, Wen QG, Wen SP, Werner M, Wiedner U, Wu LH, Wu N, Wu SX, Wu W, Wu Z, Xia LG, Xiao ZJ, Xie YG, Xiu QL, Xu GF, Xu GM, Xu H, Xu QJ, Xu XP, Xu Y, Xu ZR, Xue F, Xue Z, Yan L, Yan WB, Yan YH, Yang HX, Yang T, Yang Y, Yang YX, Ye H, Ye M, Ye MH, Yu BX, Yu CX, Yu JS, Yu SP, Yuan CZ, Yuan WL, Yuan Y, Zafar AA, Zallo A, Zeng Y, Zhang BX, Zhang BY, Zhang CC, Zhang DH, Zhang HH, Zhang HY, Zhang J, Zhang JG, Zhang JQ, Zhang JW, Zhang JY, Zhang JZ, Zhang L, Zhang SH, Zhang TR, Zhang XJ, Zhang XY, Zhang Y, Zhang YH, Zhang YS, Zhang ZP, Zhang ZY, Zhao G, Zhao HS, Zhao JW, Zhao KX, Zhao L, Zhao L, Zhao MG, Zhao Q, Zhao SJ, Zhao TC, Zhao XH, Zhao YB, Zhao ZG, Zhemchugov A, Zheng B, Zheng JP, Zheng YH, Zheng ZP, Zhong B, Zhong J, Zhou L, Zhou XK, Zhou XR, Zhu C, Zhu K, Zhu KJ, Zhu SH, Zhu XL, Zhu XW, Zhu YM, Zhu YS, Zhu ZA, Zhuang J, Zou BS, Zou JH, Zuo JX. Observation of two new N* resonances in the decay ψ(3686)→ppπ0. Phys Rev Lett 2013; 110:022001. [PMID: 23383891 DOI: 10.1103/physrevlett.110.022001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Indexed: 06/01/2023]
Abstract
Based on 106×10(6)ψ(3686) events collected with the BESIII detector at the BEPCII facility, a partial wave analysis of ψ(3686)→ppπ0 is performed. The branching fraction of this channel has been determined to be B(ψ(3686)→ppπ0)=(1.65±0.03±0.15)×10(-4). In this decay, 7 N* intermediate resonances are observed. Among these, two new resonances, N(2300) and N(2570) are significant, one 1/2+ resonance with a mass of 2300(-30-0)(+40+109) MeV/c2 and width of 340(-30-58)(+30+110) MeV/c2, and one 5/2- resonance with a mass of 2570(-10-10)(+19+34) MeV/c2 and width of 250(-24-21)(+14+69) MeV/c2. For the remaining 5 N* intermediate resonances [N(1440), N(1520), N(1535), N(1650) and N(1720)], the analysis yields mass and width values that are consistent with those from established resonances.
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Affiliation(s)
- M Ablikim
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
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Ablikim M, Achasov MN, Ambrose DJ, An FF, An Q, An ZH, Bai JZ, Ferroli RB, Ban Y, Becker J, Berger N, Bertani MB, Bian JM, Boger E, Bondarenko O, Boyko I, Briere RA, Bytev V, Cai X, Calcaterra AC, Cao GF, Chang JF, Chelkov G, Chen G, Chen HS, Chen JC, Chen ML, Chen SJ, Chen Y, Chen YB, Cheng HP, Chu YP, Cronin-Hennessy D, Dai HL, Dai JP, Dedovich D, Deng ZY, Denig A, Denysenko I, Destefanis M, Ding WM, Ding Y, Dong LY, Dong MY, Du SX, Fang J, Fang SS, Fava L, Feldbauer F, Feng CQ, Fu CD, Fu JL, Gao Y, Geng C, Goetzen K, Gong WX, Gradl W, Greco M, Gu MH, Gu YT, Guan YH, Guo AQ, Guo LB, Guo YP, Han YL, Hao XQ, Harris FA, He KL, He M, He ZY, Held T, Heng YK, Hou ZL, Hu HM, Hu JF, Hu T, Huang B, Huang GM, Huang JS, Huang XT, Huang YP, Hussain T, Ji CS, Ji Q, Ji XB, Ji XL, Jia LK, Jiang LL, Jiang XS, Jiao JB, Jiao Z, Jin DP, Jin S, Jing FF, Kalantar-Nayestanaki N, Kavatsyuk M, Kuehn W, Lai W, Lange JS, Leung JKC, Li CH, Li C, Li C, Li DM, Li F, Li G, Li HB, Li JC, Li K, Li L, Li NB, Li QJ, Li SL, Li WD, Li WG, Li XL, Li XN, Li XQ, Li XR, Li ZB, Liang H, Liang YF, Liang YT, Liao GR, Liao XT, Liu BJ, Liu BJ, Liu CL, Liu CX, Liu CY, Liu FH, Liu F, Liu F, Liu H, Liu HB, Liu HH, Liu HM, Liu HW, Liu JP, Liu K, Liu K, Liu KY, Liu PL, Liu SB, Liu X, Liu XH, Liu YB, Liu Y, Liu ZA, Liu Z, Liu Z, Loehner H, Lu GR, Lu HJ, Lu JG, Lu QW, Lu XR, Lu YP, Luo CL, Luo MX, Luo T, Luo XL, Lv M, Ma CL, Ma FC, Ma HL, Ma QM, Ma S, Ma T, Ma XY, Ma Y, Maas FE, Maggiora M, Malik QA, Mao H, Mao YJ, Mao ZP, Messchendorp JG, Min J, Min TJ, Mitchell RE, Mo XH, Morales Morales C, Motzko C, Muchnoi NY, Nefedov Y, Nicholson C, Nikolaev IB, Ning Z, Olsen SL, Ouyang Q, Pacetti SP, Park JW, Pelizaeus M, Peters K, Ping JL, Ping RG, Poling R, Prencipe E, Pun CSJ, Qi M, Qian S, Qiao CF, Qin XS, Qin Y, Qin ZH, Qiu JF, Rashid KH, Rong G, Ruan XD, Sarantsev A, Schulze J, Shao M, Shen CP, Shen XY, Sheng HY, Shepherd MR, Song XY, Spataro S, Spruck B, Sun DH, Sun GX, Sun JF, Sun SS, Sun XD, Sun YJ, Sun YZ, Sun ZJ, Sun ZT, Tang CJ, Tang X, Thorndike EH, Tian HL, Toth D, Ulrich MU, Varner GS, Wang B, Wang BQ, Wang K, Wang LL, Wang LS, Wang M, Wang P, Wang PL, Wang Q, Wang QJ, Wang SG, Wang XF, Wang XL, Wang YD, Wang YF, Wang YQ, Wang Z, Wang ZG, Wang ZY, Wei DH, Weidenkaff P, Wen QG, Wen SP, Werner MW, Wiedner U, Wu LH, Wu N, Wu SX, Wu W, Wu Z, Xia LG, Xiao ZJ, Xie YG, Xiu QL, Xu GF, Xu GM, Xu H, Xu QJ, Xu XP, Xu Y, Xu ZR, Xue F, Xue Z, Yan L, Yan WB, Yan YH, Yang HX, Yang T, Yang Y, Yang YX, Ye H, Ye M, Ye MH, Yu BX, Yu CX, Yu JS, Yu SP, Yuan CZ, Yuan WL, Yuan Y, Zafar AA, Zallo AZ, Zeng Y, Zhang BX, Zhang BY, Zhang CC, Zhang DH, Zhang HH, Zhang HY, Zhang J, Zhang JG, Zhang JQ, Zhang JW, Zhang JY, Zhang JZ, Zhang L, Zhang SH, Zhang TR, Zhang XJ, Zhang XY, Zhang Y, Zhang YH, Zhang YS, Zhang ZP, Zhang ZY, Zhao G, Zhao HS, Zhao JW, Zhao KX, Zhao L, Zhao L, Zhao MG, Zhao Q, Zhao SJ, Zhao TC, Zhao XH, Zhao YB, Zhao ZG, Zhemchugov A, Zheng B, Zheng JP, Zheng YH, Zheng ZP, Zhong B, Zhong J, Zhou L, Zhou XK, Zhou XR, Zhu C, Zhu K, Zhu KJ, Zhu SH, Zhu XL, Zhu XW, Zhu YM, Zhu YS, Zhu ZA, Zhuang J, Zou BS, Zou JH, Zuo JX. Evidence for the direct two-photon transition from ψ(3686) to J/ψ. Phys Rev Lett 2012; 109:172002. [PMID: 23215179 DOI: 10.1103/physrevlett.109.172002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2012] [Indexed: 06/01/2023]
Abstract
The two-photon transition ψ(3686)→γγJ/ψ is studied in a sample of 1.06×10(8) ψ(3686) decays collected by the BESIII detector. The branching fraction is measured to be (3.1±0.6(stat)(-1.0)(+0.8)(syst))×10(-4) using J/ψ→e(+)e(-) and J/ψ→μ(+)μ(-) decays, and its upper limit is estimated to be 4.5×10(-4) at the 90% confidence level. This work represents the first measurement of a two-photon transition among charmonium states. The orientation of the ψ(3686) decay plane and the J/ψ polarization in this decay are also studied. In addition, the product branching fractions of sequential E1 transitions ψ(3686)→γχ(cJ) and χ(cJ)→γJ/ψ(J=0,1,2) are reported.
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Affiliation(s)
- M Ablikim
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
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Ablikim M, Achasov MN, Ambrose DJ, An FF, An Q, An ZH, Bai JZ, Ban Y, Becker J, Berger N, Bertani M, Bian JM, Boger E, Bondarenko O, Boyko I, Briere RA, Bytev V, Cai X, Calcaterra A, Cao GF, Chang JF, Chelkov G, Chen G, Chen HS, Chen JC, Chen ML, Chen SJ, Chen Y, Chen YB, Cheng HP, Chu YP, Cronin-Hennessy D, Dai HL, Dai JP, Dedovich D, Deng ZY, Denig A, Denysenko I, Destefanis M, Ding WM, Ding Y, Dong LY, Dong MY, Du SX, Fang J, Fang SS, Fava L, Feldbauer F, Feng CQ, Ferroli RB, Fu CD, Fu JL, Gao Y, Geng C, Goetzen K, Gong WX, Gradl W, Greco M, Gu MH, Gu YT, Guan YH, Guo AQ, Guo LB, Guo YP, Han YL, Hao XQ, Harris FA, He KL, He M, He ZY, Held T, Heng YK, Hou ZL, Hu HM, Hu JF, Hu T, Huang B, Huang GM, Huang JS, Huang XT, Huang YP, Hussain T, Ji CS, Ji Q, Ji XB, Ji XL, Jia LK, Jiang LL, Jiang XS, Jiao JB, Jiao Z, Jin DP, Jin S, Jing FF, Kalantar-Nayestanaki N, Kavatsyuk M, Kuehn W, Lai W, Lange JS, Leung JKC, Li CH, Li C, Li C, Li DM, Li F, Li G, Li HB, Li JC, Li K, Li L, Li NB, Li QJ, Li SL, Li WD, Li WG, Li XL, Li XN, Li XQ, Li XR, Li ZB, Liang H, Liang YF, Liang YT, Liao GR, Liao XT, Liu BJ, Liu BJ, Liu CL, Liu CX, Liu CY, Liu FH, Liu F, Liu F, Liu H, Liu HB, Liu HH, Liu HM, Liu HW, Liu JP, Liu KY, Liu K, Liu K, Liu PL, Liu SB, Liu X, Liu XH, Liu Y, Liu YB, Liu ZA, Liu Z, Liu Z, Loehner H, Lu GR, Lu HJ, Lu JG, Lu QW, Lu XR, Lu YP, Luo CL, Luo MX, Luo T, Luo XL, Lv M, Ma CL, Ma FC, Ma HL, Ma QM, Ma S, Ma T, Ma XY, Ma Y, Maas FE, Maggiora M, Malik QA, Mao H, Mao YJ, Mao ZP, Messchendorp JG, Min J, Min TJ, Mitchell RE, Mo XH, Morales Morales C, Motzko C, Muchnoi NY, Nefedov Y, Nicholson C, Nikolaev IB, Ning Z, Olsen SL, Ouyang Q, Pacetti S, Park JW, Pelizaeus M, Peng HP, Peters K, Ping JL, Ping RG, Poling R, Prencipe E, Pun CSJ, Qi M, Qian S, Qiao CF, Qin XS, Qin Y, Qin ZH, Qiu JF, Rashid KH, Rong G, Ruan XD, Sarantsev A, Schaefer BD, Schulze J, Shao M, Shen CP, Shen XY, Sheng HY, Shepherd MR, Song XY, Spataro S, Spruck B, Sun DH, Sun GX, Sun JF, Sun SS, Sun XD, Sun YJ, Sun YZ, Sun ZJ, Sun ZT, Tang CJ, Tang X, Thorndike EH, Tian HL, Toth D, Ullrich M, Varner GS, Wang B, Wang BQ, Wang K, Wang LL, Wang LS, Wang M, Wang P, Wang PL, Wang Q, Wang QJ, Wang SG, Wang XF, Wang XL, Wang YD, Wang YF, Wang YQ, Wang Z, Wang ZG, Wang ZY, Wei DH, Weidenkaff P, Wen QG, Wen SP, Werner M, Wiedner U, Wu LH, Wu N, Wu SX, Wu W, Wu Z, Xia LG, Xiao ZJ, Xie YG, Xiu QL, Xu GF, Xu GM, Xu H, Xu QJ, Xu XP, Xu Y, Xu ZR, Xue F, Xue Z, Yan L, Yan WB, Yan YH, Yang HX, Yang T, Yang Y, Yang YX, Ye H, Ye M, Ye MH, Yu BX, Yu CX, Yu JS, Yu L, Yu SP, Yuan CZ, Yuan WL, Yuan Y, Zafar AA, Zallo A, Zeng Y, Zhang BX, Zhang BY, Zhang CC, Zhang DH, Zhang HH, Zhang HY, Zhang J, Zhang JG, Zhang JQ, Zhang JW, Zhang JY, Zhang JZ, Zhang L, Zhang SH, Zhang TR, Zhang XJ, Zhang XY, Zhang Y, Zhang YH, Zhang YS, Zhang ZP, Zhang ZY, Zhao G, Zhao HS, Zhao JW, Zhao KX, Zhao L, Zhao L, Zhao MG, Zhao Q, Zhao SJ, Zhao TC, Zhao XH, Zhao YB, Zhao ZG, Zhemchugov A, Zheng B, Zheng JP, Zheng YH, Zheng ZP, Zhong B, Zhong J, Zhou L, Zhou XK, Zhou XR, Zhu C, Zhu K, Zhu KJ, Zhu SH, Zhu XL, Zhu XW, Zhu YM, Zhu YS, Zhu ZA, Zhuang J, Zou BS, Zou JH, Zuo JX. First observation of the M1 transition ψ(3686)→γη(c)(2S). Phys Rev Lett 2012; 109:042003. [PMID: 23006078 DOI: 10.1103/physrevlett.109.042003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Indexed: 06/01/2023]
Abstract
Using a sample of 106×10(6) ψ(3686) events collected with the BESIII detector at the BEPCII storage ring, we have made the first measurement of the M1 transition between the radially excited charmonium S-wave spin-triplet and the radially excited S-wave spin-singlet states: ψ(3686)→γη(c)(2S). Analyses of the processes ψ(3686)→γη(c)(2S) with η(c)(2S)→K(S)(0)K(±)π(∓) and K(+)K(-)π(0) give an η(c)(2S) signal with a statistical significance of greater than 10 standard deviations under a wide range of assumptions about the signal and background properties. The data are used to obtain measurements of the η(c)(2S) mass (M(η(c)(2S))=3637.6±2.9(stat)±1.6(syst) MeV/c(2)), width (Γ(η(c)(2S))=16.9±6.4(stat)±4.8(syst) MeV), and the product branching-fraction (B(ψ(3686)→γη(c)(2S))×B(η(c)(2S)→KKπ)=(1.30±0.20(stat)±0.30(syst))×10(-5)). Combining our result with a BABAR measurement of B(η(c)(2S)→KKπ), we find the branching fraction of the M1 transition to be B(ψ(3686)→γη(c)(2S))=(6.8±1.1(stat)±4.5(syst))×10(-4).
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Affiliation(s)
- M Ablikim
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
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Ablikim M, Achasov MN, Alberto D, Ambrose DJ, An FF, An Q, An ZH, Bai JZ, Ferroli RB, Ban Y, Becker J, Berger N, Bertani MB, Bian JM, Boger E, Bondarenko O, Boyko I, Briere RA, Bytev V, Cai X, Calcaterra AC, Cao GF, Chang JF, Chelkov G, Chen G, Chen HS, Chen HX, Chen JC, Chen ML, Chen SJ, Chen Y, Chen YB, Cheng HP, Chu YP, Cronin-Hennessy D, Dai HL, Dai JP, Dedovich D, Deng ZY, Denysenko I, Destefanis M, Ding WL, Ding Y, Dong LY, Dong MY, Du SX, Fang J, Fang SS, Feng CQ, Fu CD, Fu JL, Gao Y, Geng C, Goetzen K, Gong WX, Greco M, Gu MH, Gu YT, Guan YH, Guo AQ, Guo LB, Guo YP, Han YL, Hao XQ, Harris FA, He KL, He M, He ZY, Heng YK, Hou ZL, Hu HM, Hu JF, Hu T, Huang B, Huang GM, Huang JS, Huang XT, Huang YP, Hussain T, Ji CS, Ji Q, Ji XB, Ji XL, Jia LK, Jiang LL, Jiang XS, Jiao JB, Jiao Z, Jin DP, Jin S, Jing FF, Kalantar-Nayestanaki N, Kavatsyuk M, Kuehn W, Lai W, Lange JS, Leung JKC, Li CH, Li C, Li C, Li DM, Li F, Li G, Li HB, Li JC, Li K, Li L, Li NB, Li QJ, Li SL, Li WD, Li WG, Li XL, Li XN, Li XQ, Li XR, Li ZB, Liang H, Liang YF, Liang YT, Liao GR, Liao XT, Liu BJ, Liu CL, Liu CX, Liu CY, Liu FH, Liu F, Liu F, Liu H, Liu HB, Liu HH, Liu HM, Liu HW, Liu JP, Liu K, Liu K, Liu KY, Liu Q, Liu SB, Liu X, Liu XH, Liu YB, Liu Y, Liu ZA, Liu Z, Liu Z, Loehner H, Lu GR, Lu HJ, Lu JG, Lu QW, Lu XR, Lu YP, Luo CL, Luo MX, Luo T, Luo XL, Lv M, Ma CL, Ma FC, Ma HL, Ma QM, Ma S, Ma T, Ma XY, Maggiora M, Malik QA, Mao H, Mao YJ, Mao ZP, Messchendorp JG, Min J, Min TJ, Mitchell RE, Mo XH, Muchnoi NY, Nefedov Y, Nikolaev IB, Ning Z, Olsen SL, Ouyang Q, Pacetti SP, Park JW, Pelizaeus M, Peters K, Ping JL, Ping RG, Poling R, Pun CSJ, Qi M, Qian S, Qiao CF, Qin XS, Qiu JF, Rashid KH, Rong G, Ruan XD, Sarantsev A, Schulze J, Shao M, Shen CP, Shen XY, Sheng HY, Shepherd MR, Song XY, Spataro S, Spruck B, Sun DH, Sun GX, Sun JF, Sun SS, Sun XD, Sun YJ, Sun YZ, Sun ZJ, Sun ZT, Tang CJ, Tang X, Thorndike EH, Tian HL, Toth D, Varner GS, Wang B, Wang BQ, Wang K, Wang LL, Wang LL, Wang LS, Wang M, Wang P, Wang PL, Wang Q, Wang QJ, Wang SG, Wang XF, Wang XL, Wang YD, Wang YF, Wang YQ, Wang Z, Wang ZG, Wang ZY, Wei DH, Wen QG, Wen SP, Wiedner U, Wu LH, Wu N, Wu W, Wu Z, Xiao ZJ, Xie YG, Xiu QL, Xu GF, Xu GM, Xu H, Xu QJ, Xu XP, Xu Y, Xu ZR, Xue Z, Yan L, Yan WB, Yan YH, Yang HX, Yang T, Yang Y, Yang YX, Ye H, Ye M, Ye MH, Yu BX, Yu CX, Yu SP, Yuan CZ, Yuan WL, Yuan Y, Zafar AA, Zallo AZ, Zeng Y, Zhang BX, Zhang BY, Zhang CC, Zhang DH, Zhang HH, Zhang HY, Zhang J, Zhang JQ, Zhang JW, Zhang JY, Zhang JZ, Zhang L, Zhang SH, Zhang TR, Zhang XJ, Zhang XY, Zhang Y, Zhang YH, Zhang YS, Zhang ZP, Zhang ZY, Zhao G, Zhao HS, Zhao J, Zhao L, Zhao L, Zhao MG, Zhao Q, Zhao SJ, Zhao TC, Zhao XH, Zhao YB, Zhao ZG, Zhemchugov A, Zheng B, Zheng JP, Zheng YH, Zheng ZP, Zhong B, Zhong J, Zhou L, Zhou XK, Zhou XR, Zhu C, Zhu K, Zhu KJ, Zhu SH, Zhu XL, Zhu XW, Zhu YS, Zhu ZA, Zhuang J, Zou BS, Zou JH, Zuo JX. Measurements of the mass and width of the η(c) using the decay ψ(3686)→γη(c). Phys Rev Lett 2012; 108:222002. [PMID: 23003588 DOI: 10.1103/physrevlett.108.222002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Indexed: 06/01/2023]
Abstract
The mass and width of the lowest-lying S-wave spin singlet charmonium state, the η(c), are measured using a data sample of 1.06×10(8) ψ(3686) decays collected with the BESIII detector at the BEPCII storage ring. We use a model that incorporates full interference between the signal reaction, ψ(3686)→γη(c), and a nonresonant radiative background to describe the line shape of the η(c) successfully. We measure the η(c) mass to be 2984.3±0.6±0.6 MeV/c(2) and the total width to be 32.0±1.2±1.0 MeV, where the first errors are statistical and the second are systematic.
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Affiliation(s)
- M Ablikim
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
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Ablikim M, Achasov MN, Alberto D, Ambrose DJ, An FF, An Q, An ZH, Bai JZ, Baldini Ferroli RBF, Ban Y, Becker J, Berger N, Bertani MB, Bian JM, Boger E, Bondarenko O, Boyko I, Briere RA, Bytev V, Cai X, Calcaterra AC, Cao GF, Chang JF, Chelkov G, Chen G, Chen HS, Chen JC, Chen ML, Chen SJ, Chen Y, Chen YB, Cheng HP, Chu YP, Cronin-Hennessy D, Dai HL, Dai JP, Dedovich D, Deng ZY, Denysenko I, Destefanis M, Ding Ding WL, Ding Y, Dong LY, Dong MY, Du SX, Fang J, Fang SS, Feng CQ, Fu CD, Fu JL, Gao Y, Geng C, Goetzen K, Gong WX, Greco M, Gu MH, Gu YT, Guan YH, Guo AQ, Guo LB, Guo YP, Han YL, Hao XQ, Harris FA, He KL, He M, He ZY, Heng YK, Hou ZL, Hu HM, Hu JF, Hu T, Huang B, Huang GM, Huang JS, Huang XT, Huang YP, Hussain T, Ji CS, Ji Q, Ji XB, Ji XL, Jia LK, Jiang LL, Jiang XS, Jiao JB, Jiao Z, Jin DP, Jin S, Jing FF, Kalantar-Nayestanaki N, Kavatsyuk M, Kuehn W, Lai W, Lange JS, Leung JKC, Li CH, Li C, Li C, Li DM, Li F, Li G, Li HB, Li JC, Li K, Li L, Li NB, Li QJ, Li SL, Li WD, Li WG, Li XL, Li XN, Li XQ, Li XR, Li ZB, Liang H, Liang YF, Liang YT, Liao GR, Liao XT, Liu BJ, Liu CL, Liu CX, Liu CY, Liu FH, Liu F, Liu F, Liu H, Liu HB, Liu HH, Liu HM, Liu HW, Liu JP, Liu K, Liu K, Liu KY, Liu Q, Liu SB, Liu X, Liu XH, Liu YB, Liu Y, Liu ZA, Liu Z, Liu Z, Loehner H, Lu GR, Lu HJ, Lu JG, Lu QW, Lu XR, Lu YP, Luo CL, Luo MX, Luo T, Luo XL, Lv M, Ma CL, Ma FC, Ma HL, Ma QM, Ma S, Ma T, Ma XY, Maggiora M, Malik QA, Mao H, Mao YJ, Mao ZP, Messchendorp JG, Min J, Min TJ, Mitchell RE, Mo XH, Muchnoi NY, Nefedov Y, Nikolaev IB, Ning Z, Olsen SL, Ouyang Q, Pacetti SP, Park JW, Pelizaeus M, Peters K, Ping JL, Ping RG, Poling R, Pun CSJ, Qi M, Qian S, Qiao CF, Qin XS, Qiu JF, Rashid KH, Rong G, Ruan XD, Sarantsev A, Schulze J, Shao M, Shen CP, Shen XY, Sheng HY, Shepherd MR, Song XY, Spataro S, Spruck B, Sun DH, Sun GX, Sun JF, Sun SS, Sun XD, Sun YJ, Sun YZ, Sun ZJ, Sun ZT, Tang CJ, Tang X, Thorndike EH, Tian HL, Toth D, Varner GS, Wan X, Wang B, Wang BQ, Wang K, Wang LL, Wang LS, Wang M, Wang P, Wang PL, Wang Q, Wang QJ, Wang SG, Wang XF, Wang XL, Wang YD, Wang YF, Wang YQ, Wang Z, Wang ZG, Wang ZY, Wei DH, Wen QG, Wen SP, Wiedner U, Wu LH, Wu N, Wu W, Wu Z, Xiao ZJ, Xie YG, Xiu QL, Xu GF, Xu GM, Xu H, Xu QJ, Xu XP, Xu Y, Xu ZR, Xue Z, Yan L, Yan WB, Yan YH, Yang HX, Yang T, Yang Y, Yang YX, Ye H, Ye M, Ye MH, Yu BX, Yu CX, Yu SP, Yuan CZ, Yuan WL, Yuan Y, Zafar AA, Zallo AZ, Zeng Y, Zhang BX, Zhang BY, Zhang CC, Zhang DH, Zhang HH, Zhang HY, Zhang J, Zhang JQ, Zhang JW, Zhang JY, Zhang JZ, Zhang L, Zhang SH, Zhang TR, Zhang XJ, Zhang XY, Zhang Y, Zhang YH, Zhang YS, Zhang ZP, Zhang ZY, Zhao G, Zhao HS, Zhao J, Zhao L, Zhao L, Zhao MG, Zhao Q, Zhao SJ, Zhao TC, Zhao XH, Zhao YB, Zhao ZG, Zhemchugov A, Zheng B, Zheng JP, Zheng YH, Zheng ZP, Zhong B, Zhong J, Zhou L, Zhou XK, Zhou XR, Zhu C, Zhu K, Zhu KJ, Zhu SH, Zhu XL, Zhu XW, Zhu YS, Zhu ZA, Zhuang J, Zou BS, Zou JH, Zuo JX. First observation of η(1405) decays into f(0)(980)π0. Phys Rev Lett 2012; 108:182001. [PMID: 22681064 DOI: 10.1103/physrevlett.108.182001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2012] [Indexed: 06/01/2023]
Abstract
The decays J/ψ → γ π+ π- π0 and J/ψ → γ π0 π0 π0 are analyzed using a sample of 225×10(6) J/ψ events collected with the BESIII detector. The decay of η(1405) → f(0)(980)π0 with a large isospin violation is observed for the first time. The width of the f(0)(980) observed in the dipion mass spectra is anomalously narrower than the world average. Decay rates for three-pion decays of the η' are also measured precisely.
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Affiliation(s)
- M Ablikim
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
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Ablikim M, Achasov MN, Alberto D, Ambrose DJ, An FF, An Q, An ZH, Bai JZ, Baldini Ferroli RBF, Ban Y, Becker J, Berger N, Bertani MB, Bian JM, Boger E, Bondarenko O, Boyko I, Briere RA, Bytev V, Cai X, Calcaterra AC, Cao GF, Chang JF, Chelkov G, Chen G, Chen HS, Chen JC, Chen ML, Chen SJ, Chen Y, Chen YB, Cheng HP, Chu YP, Cronin-Hennessy D, Dai HL, Dai JP, Dedovich D, Deng ZY, Denysenko I, Destefanis M, Ding Ding WL, Ding Y, Dong LY, Dong MY, Du SX, Fang J, Fang SS, Feng CQ, Fu CD, Fu JL, Gao Y, Geng C, Goetzen K, Gong WX, Greco M, Gu MH, Gu YT, Guan YH, Guo AQ, Guo LB, Guo YP, Han YL, Hao XQ, Harris FA, He KL, He M, He ZY, Heng YK, Hou ZL, Hu HM, Hu JF, Hu T, Huang B, Huang GM, Huang JS, Huang XT, Huang YP, Hussain T, Ji CS, Ji Q, Ji XB, Ji XL, Jia LK, Jiang LL, Jiang XS, Jiao JB, Jiao Z, Jin DP, Jin S, Jing FF, Kalantar-Nayestanaki N, Kavatsyuk M, Kuehn W, Lai W, Lange JS, Leung JKC, Li CH, Li C, Li C, Li DM, Li F, Li G, Li HB, Li JC, Li K, Li L, Li NB, Li QJ, Li SL, Li WD, Li WG, Li XL, Li XN, Li XQ, Li XR, Li ZB, Liang H, Liang YF, Liang YT, Liao GR, Liao XT, Liu BJ, Liu CL, Liu CX, Liu CY, Liu FH, Liu F, Liu F, Liu H, Liu HB, Liu HH, Liu HM, Liu HW, Liu JP, Liu K, Liu K, Liu KY, Liu Q, Liu SB, Liu X, Liu XH, Liu YB, Liu Y, Liu ZA, Liu Z, Liu Z, Loehner H, Lu GR, Lu HJ, Lu JG, Lu QW, Lu XR, Lu YP, Luo CL, Luo MX, Luo T, Luo XL, Lv M, Ma CL, Ma FC, Ma HL, Ma QM, Ma S, Ma T, Ma XY, Maggiora M, Malik QA, Mao H, Mao YJ, Mao ZP, Messchendorp JG, Min J, Min TJ, Mitchell RE, Mo XH, Muchnoi NY, Nefedov Y, Nikolaev IB, Ning Z, Olsen SL, Ouyang Q, Pacetti SP, Park JW, Pelizaeus M, Peters K, Ping JL, Ping RG, Poling R, Pun CSJ, Qi M, Qian S, Qiao CF, Qin XS, Qiu JF, Rashid KH, Rong G, Ruan XD, Sarantsev A, Schulze J, Shao M, Shen CP, Shen XY, Sheng HY, Shepherd MR, Song XY, Spataro S, Spruck B, Sun DH, Sun GX, Sun JF, Sun SS, Sun XD, Sun YJ, Sun YZ, Sun ZJ, Sun ZT, Tang CJ, Tang X, Thorndike EH, Tian HL, Toth D, Varner GS, Wang B, Wang BQ, Wang K, Wang LL, Wang LS, Wang M, Wang P, Wang PL, Wang Q, Wang QJ, Wang SG, Wang XF, Wang XL, Wang YD, Wang YF, Wang YQ, Wang Z, Wang ZG, Wang ZY, Wei DH, Wen QG, Wen SP, Wiedner U, Wu LH, Wu N, Wu W, Wu Z, Xiao ZJ, Xie YG, Xiu QL, Xu GF, Xu GM, Xu H, Xu QJ, Xu XP, Xu Y, Xu ZR, Xue Z, Yan L, Yan WB, Yan YH, Yang HX, Yang T, Yang Y, Yang YX, Ye H, Ye M, Ye MH, Yu BX, Yu CX, Yu SP, Yuan CZ, Yuan WL, Yuan Y, Zafar AA, Zallo AZ, Zeng Y, Zhang BX, Zhang BY, Zhang CC, Zhang DH, Zhang HH, Zhang HY, Zhang J, Zhang JQ, Zhang JW, Zhang JY, Zhang JZ, Zhang L, Zhang SH, Zhang TR, Zhang XJ, Zhang XY, Zhang Y, Zhang YH, Zhang YS, Zhang ZP, Zhang ZY, Zhao G, Zhao HS, Zhao J, Zhao L, Zhao L, Zhao MG, Zhao Q, Zhao SJ, Zhao TC, Zhao XH, Zhao YB, Zhao ZG, Zhemchugov A, Zheng B, Zheng JP, Zheng YH, Zheng ZP, Zhong B, Zhong J, Zhou L, Zhou XK, Zhou XR, Zhu C, Zhu K, Zhu KJ, Zhu SH, Zhu XL, Zhu XW, Zhu YS, Zhu ZA, Zhuang J, Zou BS, Zou JH, Zuo JX. Spin-parity analysis of pp¯ mass threshold structure in J/ψ and ψ(3686) radiative decays. Phys Rev Lett 2012; 108:112003. [PMID: 22540467 DOI: 10.1103/physrevlett.108.112003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Indexed: 05/31/2023]
Abstract
A partial wave analysis of the pp¯ mass-threshold enhancement in the reaction J/ψ→γpp¯ is used to determine its J(PC) quantum numbers to be 0(-+), its peak mass to be below threshold at M=1832(-5)(+19)(stat)(-17)(+18)(syst)±19(model) MeV/c(2), and its total width to be Γ<76 MeV/c(2) at the 90% C.L. The product of branching ratios is measured to be BR[J/ψ→γX(pp¯)]BR[X(pp¯)→pp¯]=[9.0(-1.1)(+0.4)(stat)(-5.0)(+1.5)(syst)±2.3(model)]×10(-5). A similar analysis performed on ψ(3686)→γpp¯ decays shows, for the first time, the presence of a corresponding enhancement with a production rate relative to that for J/ψ decays of R=[5.08(-0.45)(+0.71)(stat)(-3.58)(+0.67)(syst)±0.12(model)]%.
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Affiliation(s)
- M Ablikim
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
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Yu SP, Kwan BCH, Thomas PS. Nebuliser solution bottle cap presenting as a foreign body in the subglottic airway. Eur Respir Rev 2010; 19:257-8. [PMID: 20956203 DOI: 10.1183/09059180.00003210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Lu ZY, Yu SP, Wei JF, Wei L. Age-related neural degeneration in nuclear-factor κB p50 knockout mice. Neuroscience 2006; 139:965-78. [PMID: 16533569 DOI: 10.1016/j.neuroscience.2005.12.062] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2005] [Revised: 12/09/2005] [Accepted: 12/30/2005] [Indexed: 11/21/2022]
Abstract
Nuclear factor-kappaB is a transcription factor that regulates a variety of genes involved not only with immune and inflammatory responses, but also in cell survival. Nuclear-factor kappaB in the CNS is an area of current research interest; however, its role in age-related neural degeneration is obscure. The present study examines developmental degeneration changes in wild type and nuclear factor-kappaB p50 subunit knockout mice (p50-/-) using various morphological methodologies. P50-/- mice appeared normal at birth. At 6 and 10 months old, the body weight of p50-/- mice was significantly less than that of wild type mice and they started to die from aging. Consistently, terminal deoxynucleotidyltransferase-mediated dUTP-biotin nick end-labeling positive cells in the cortex were significantly more in p50-/- mice than that in wild type mice, and neuronal cells in the cortex, hippocampus and caudate nucleus-putamen decreased in p50-/- mice. Fewer myelinated axons of the optic nerve were found in p50-/- mice than in wild type mice at 6 months. In p50-/- mice, morphological examinations showed: 1) aging and degenerative changes in the cortex and hippocampus including increased lipofuscin granules in neural cytoplasm, 2) abnormal capillaries, 3) dark and watery alterations and organelle accumulations, 4) apoptotic glia cells, and 5) terminal deoxynucleotidyltransferase-mediated dUTP-biotin nick end-labeling and caspase-3 positive neurons. These results suggest that nuclear-factor kappaB may play an important role in neurovascular development, cell survival, and the aging process in the CNS. This new evidence linking nuclear-factor kappaB to myelination and aging may be of considerable importance for several areas of basic and clinical neuroscience.
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Affiliation(s)
- Z-Y Lu
- Department of Pathology and Laboratory Medicine, Medical University of South Carolina, 165 Ashley Avenue, Charleston, SC 29425, USA
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Abstract
AIM: To investigate the value of spiral CT pneumocolon in preoperative colorectal carcinoma.
METHODS: Spiral CT pneumocolon was performed prior to surgery in 64 patients with colorectal carcinoma. Spiral CT images were compared to specimens from the resected tumor.
RESULTS: Spiral CT depicted the tumor in all patients. Comparison of spiral CT and histologic results showed that the sensitivity and specificity were 95.2%, 40.9% in detection of local invasion, and 75.0%, 90.9% in detection of lymph node metastasis. Compared to the Dukes classification, the disease was correctly staged as A in 6 of 18 patients, as B in 18 of 23, as C in 10 of 15, and as D in 7 of 8. Overall, spiral CT correctly staged 64.1% of patients.
CONCLUSION: Spiral CT pneumocolon may be useful in the preoperative assessment of patients with colorectal carcinoma as a means for assisting surgical planning.
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Affiliation(s)
- Can-Hui Sun
- Department of Radiology, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, Guangdong Province, China
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Abstract
Activation of ionotropic glutamate receptors can induce neuronal apoptosis in vitro and in vivo. We showed previously that activation of the N-methyl-D-aspartic acid (NMDA) subtype of glutamate receptors in a low Ca(2+) and low Na(+) condition induced apoptotic neuronal death, and that the K(+) efflux via NMDA receptor channels was likely a key event in NMDA-induced apoptosis. Since non-NMDA receptors, alpha-amino-3-hydroxy-5-methyl-4-isoxazole-propionate (AMPA) and kainate receptors, are also permeable to K(+), we tested the hypothesis that stimulating K(+) efflux via non-NMDA receptor channels could induce apoptosis in cultured cortical neurons. Using a Ca(2+)-free and Na(+)-free external solution, application of kainate revealed outward membrane currents carried by K(+) efflux. In a low Ca(2+)/low Na(+) medium, a 5-h exposure to 50-500 microM AMPA in the presence of the NMDA receptor antagonist MK801 induced dose-dependent neuronal death 24 h after the onset of the insult, accompanied by intracellular K(+) reduction and caspase-3 activation. The AMPA-induced cell death was attenuated by the caspase inhibitor Z-Val-Ala-Asp(OMe)-fluoromethyl ketone (Z-VAD-FMK) and by the protein synthesis inhibitor cycloheximide. Reducing K(+) efflux by raising extracellular K(+) concentration from 5 to 25 mM attenuated AMPA-triggered cell death, the Ca(2+) channel antagonist nifedipine showed no effect on the AMPA toxicity. Kainate induced similar neuronal death sensitive to attenuation by Z-VAD-FMK or elevated extracellular K(+).We suggest that the non-NMDA receptor-mediated K(+) efflux may participate in apoptotic process and that blocking excessive K(+) efflux mediated by NMDA and non-NMDA receptors may selectively prevent neuronal apoptosis under certain pathological conditions.
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Affiliation(s)
- A Y Xiao
- Center for the Study of Nervous System Injury and Department of Neurology, Box 8111, Washington University School of Medicine, St. Louis, MO 63110, USA
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Manzerra P, Behrens MM, Canzoniero LM, Wang XQ, Heidinger V, Ichinose T, Yu SP, Choi DW. Zinc induces a Src family kinase-mediated up-regulation of NMDA receptor activity and excitotoxicity. Proc Natl Acad Sci U S A 2001; 98:11055-61. [PMID: 11572968 PMCID: PMC58682 DOI: 10.1073/pnas.191353598] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Zinc is coreleased with glutamate from excitatory nerve terminals throughout the central nervous system and acutely inhibits N-methyl-d-aspartate (NMDA) receptor activation. Here we report that cultured murine cortical neurons briefly exposed to sublethal concentrations of zinc developed increased intracellular free Na(+), phosphorylation of Src kinase at tyrosine 220, and tyrosine phosphorylation of NMDA receptor 2A/2B subunits, in a fashion sensitive to the Src family kinase inhibitor 4-amino-5-(4-chlorophenyl)-7-(t-butyl)pyrazolo[3,4-d]pyrimidine, PP2. Functionally, this zinc exposure produced a delayed increase in NMDA receptor current in perforated patch but not conventional whole-cell recordings, as well as an increase in NMDA receptor-mediated cell death. These observations suggest that the effect of synaptically released zinc on neuronal NMDA receptors may be biphasic: acute block, followed by Src family kinase-mediated up-regulation of NMDA receptor activity and cytotoxicity.
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Affiliation(s)
- P Manzerra
- Center for the Study of Nervous System Injury and Department of Neurology, Washington University School of Medicine, St. Louis, MO 63105, USA
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28
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Abstract
Alterations in the transmembrane gradients of several physiological ions may influence programmed cell death. In particular, recent data suggest that increases in intracellular calcium may either promote or inhibit apoptosis, depending on the level, timing and location, whereas loss of intracellular potassium promotes apoptosis.
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Affiliation(s)
- S P Yu
- Center for the Study of Nervous System Injury and Department of Neurology, Washington University School of Medicine, 660 South Euclid Avenue, Missouri 63110, St. Louis, USA.
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29
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Snider BJ, Choi J, Turetsky DM, Canzoniero LM, Sensi SL, Sheline CT, Wang X, Yu SP, Choi DW. Nitric oxide reduces Ca(2+) and Zn(2+) influx through voltage-gated Ca(2+) channels and reduces Zn(2+) neurotoxicity. Neuroscience 2001; 100:651-61. [PMID: 11098127 DOI: 10.1016/s0306-4522(00)00311-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The translocation of synaptic Zn(2+) from nerve terminals into selectively vulnerable neurons may contribute to the death of these neurons after global ischemia. We hypothesized that cellular Zn(2+) overload might be lethal for reasons similar to cellular Ca(2+) overload and tested the hypothesis that Zn(2+) neurotoxicity might be mediated by the activation of nitric oxide synthase. Although Zn(2+) (30-300microM) altered nitric oxide synthase activity in cerebellar extracts in solution, it did not affect nitric oxide synthase activity in cultured murine neocortical neurons. Cultured neurons exposed to 300-500microM Zn(2+) for 5min under depolarizing conditions developed widespread degeneration over the next 24h that was unaffected by the concurrent addition of the nitric oxide synthase inhibitor N(G)-nitro-L-arginine. Furthermore, Zn(2+) neurotoxicity was attenuated when nitric oxide synthase activity in the cultures was induced by exposure to cytokines, exogenous nitric oxide was added or nitric oxide production was pharmacologically enhanced. The unexpected protective effect of nitric oxide against Zn(2+) toxicity may be explained, at least in part, by reduction of toxic Zn(2+) entry. Exposure to nitric oxide donors reduced Ba(2+) current through high-voltage activated calcium channels, as well as K(+)-stimulated neuronal uptake of 45Ca(2+) or 65Zn(2+). The oxidizing agents thimerosal and 2,2'-dithiodipyridine also reduced K(+)-stimulated cellular 45Ca(2+) uptake, while akylation of thiols by pretreatment with N-ethylmaleimide blocked the reduction of 45Ca(2+) uptake by a nitric oxide donor.The results suggest that Zn(2+)-induced neuronal death is not mediated by the activation of nitric oxide synthase; rather, available nitric oxide may attenuate Zn(2+) neurotoxicity by reducing Zn(2+) entry through voltage-gated Ca(2+) channels, perhaps by oxidizing key thiol groups.
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Affiliation(s)
- B J Snider
- Center for the Study of Nervous System Injury and Department of Neurology, Washington University School of Medicine, St Louis, Missouri, USA
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Abstract
Potassium channels constitute a superfamily of the most diversified ion channels, acting in delicate and accurate ways to control or modify many physiological and pathological functions including membrane excitability, transmitter release, cell proliferation and cell degeneration. The M-type channel is a unique ligand-regulated and voltage-gated K(+) channel showing distinct physiological and pharmacological characteristics. This review will cover some important progress in the study of M channel modulation, particularly focusing on membrane transduction mechanisms. The K(+) channel genes corresponding to the M channel have been identified and will be reviewed in detail. It has been a long journey since the discovery of M current in 1980 to our present understanding of the mysterious mechanisms for M channel modulation; a journey which exemplifies tremendous achievements in ion channel research and exciting discoveries of elaborate modulatory systems linked to these channels. While substantial evidence has accumulated, challenging questions remain to be answered.
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Affiliation(s)
- B S Brown
- General Pharmacology Department, DuPont Pharmaceuticals Company, Wilmington, DE 19880-0400, USA
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31
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Wang X, Xiao AY, Ichinose T, Yu SP. Effects of tetraethylammonium analogs on apoptosis and membrane currents in cultured cortical neurons. J Pharmacol Exp Ther 2000; 295:524-30. [PMID: 11046085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023] Open
Abstract
Tetraethylammonium (TEA), the quaternary ammonium ion and nonselective K(+) channel blocker, is protective against neuronal apoptosis. We now tested two TEA analogs, tetrapentylammonium (TPeA) and tetrahexylammonium (THA), for their effects on apoptotic neuronal death and for their pharmacological profiles on membrane currents in cultured mouse cortical neurons. TPeA and THA (0.1-1.0 microM) attenuated staurosporine-induced caspase-3 activation and neuronal apoptosis. TPeA and THA blocked the outward delayed rectifier K(+) (I(K)) current in concentration-dependent manners with IC(50) values of 2.7 and 1.9 microM, respectively. I(K) was blocked by TPeA in a use-dependent manner, whereas THA blocked I(K) regardless of activation state of the channel. TPeA at 1 microM inhibited the high voltage-activated (HVA) Ca(2+) current and the A-type K(+) current (I(A)). TPeA (1-10 microM) also blocked the fast inactivating Na(+) current. The ligand-gated N-methyl-D-aspartate (NMDA) receptor current was not affected by up to 20 microM TPeA. THA at 1 microM showed inhibitory effects on I(A), HVA Ca(2+), and Na(+) currents. THA (10 microM) suppressed NMDA currents. The data suggest that, as K(+) channel blockers and apoptosis antagonists, TPeA and THA are much more potent than TEA; however, they have nonspecific actions on several voltage-gated or ligand-gated channels.
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Affiliation(s)
- X Wang
- Department of Neurology, Center for the Study of Nervous System Injury, School of Medicine, Washington University, St. Louis, Missouri 63110, USA
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32
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Kerchner GA, Canzoniero LM, Yu SP, Ling C, Choi DW. Zn2+ current is mediated by voltage-gated Ca2+ channels and enhanced by extracellular acidity in mouse cortical neurones. J Physiol 2000; 528 Pt 1:39-52. [PMID: 11018104 PMCID: PMC2270119 DOI: 10.1111/j.1469-7793.2000.00039.x] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
1. Mammalian neuronal voltage-gated Ca2+ channels have been implicated as potential mediators of membrane permeability to Zn2+. We tested directly whether voltage-gated Ca2+ channels can flux Zn2+ in whole-cell voltage-clamp recordings from cultured murine cortical neurones. 2. In the presence of extracellular Zn2+ and no Na+, K+, or other divalent cations, a small, non-inactivating, voltage-gated inward current was observed exhibiting a current-voltage relationship characteristic of high-voltage activated (HVA) Ca2+ channels. Inward current was detectable at Zn2+ levels as low as 50 microM, and both the amplitude and voltage sensitivity of the current depended upon Zn2+ concentration. This Zn2+ current was sensitive to blockade by Gd3+ and nimodipine and, to a lesser extent, by omega-conotoxin GVIA. 3. Zn2+ could permeate Ca2+ channels in the presence of Ca2+ and other physiological cations. Inward currents recorded with 2 mM Ca2+ were attenuated by Zn2+ (IC50 = 210 microM), and currents recorded with Zn2+ were unaffected by up to equimolar Ca2+ concentrations. Furthermore, the Zn2+-selective fluorescent dye Newport Green revealed a depolarisation-activated, nimodipine-sensitive Zn2+ influx into cortical neurones that were bathed in a physiological extracellular solution plus 300 microM ZnCl2. 4. Surprisingly, while lowering extracellular pH suppressed HVA Ca2+ currents, Zn2+ current amplitude was affected oppositely, varying inversely with pH with an apparent pK of 7.4. The acidity-induced enhancement of Zn2+ current was associated with a positive shift in reversal potential but no change in the kinetics or voltage sensitivity of channel activation. 5. These results provide evidence that L- and N-type voltage-gated Ca2+ channels can mediate Zn2+ entry into cortical neurones and that this entry may be enhanced by extracellular acidity.
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Affiliation(s)
- G A Kerchner
- Center for the Study of Nervous System Injury and Department of Neurology, Washington University School of Medicine, 660 S. Euclid Avenue, St Louis, MO 63110, USA
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33
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Affiliation(s)
- S P Yu
- Department of Neurology and Center for the Study of Nervous System Injury, Washington University School of Medicine, St. Louis, MO 63110, USA
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34
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Behrens MM, Strasser U, Heidinger V, Lobner D, Yu SP, McDonald JW, Won M, Choi DW. Selective activation of group II mGluRs with LY354740 does not prevent neuronal excitotoxicity. Neuropharmacology 1999; 38:1621-30. [PMID: 10530823 DOI: 10.1016/s0028-3908(99)00098-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Recent reports have suggested a role for group II metabotropic glutamate receptors (mGluRs) in the attenuation of excitotoxicity. Here we examined the effects of the recently available group II agonist (+)-2-Aminobicyclo[3.1.0]hexane-2-6-dicarboxylic acid (LY354740) on N-methyl-D-aspartate (NMDA)-induced excitotoxic neuronal death, as well as on hypoxic-ischemic neuronal death both in vitro and in vivo. At concentrations shown to be selective for group II mGluRs expressed in cell lines (0.1-100 nM), LY354740 did not attenuate NMDA-mediated neuronal death in vitro or in vivo. Furthermore, LY354740 did not attenuate oxygen-glucose deprivation-induced neuronal death in vitro or ischemic infarction after transient middle cerebral artery occlusion in rats. In addition, the neuroprotective effect of another group II agonist, (S)-4-carboxy-3-phenylglycine (4C3HPG), which has shown injury attenuating effects both in vitro and in vivo, was not blocked by the group II antagonists (2 S)-alpha-ethylglutamic acid (EGLU), (RS)-alpha-methyl-4-sulphonophenylglycine (MSPG), or the group III antagonist (S)-alpha-methyl-3-carboxyphenylalanine (MCPA), suggesting that this neuroprotection may be mediated by other effects such as upon group I mGluRs.
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Affiliation(s)
- M M Behrens
- Center for the Study of Nervous System Injury and Department of Neurology, Washington University School of Medicine, St. Louis, MO 63110, USA
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35
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Yu SP, Yeh CH, Gottron F, Wang X, Grabb MC, Choi DW. Role of the outward delayed rectifier K+ current in ceramide-induced caspase activation and apoptosis in cultured cortical neurons. J Neurochem 1999; 73:933-41. [PMID: 10461882 DOI: 10.1046/j.1471-4159.1999.0730933.x] [Citation(s) in RCA: 98] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We studied the novel hypothesis that an up-modulation of channels for outward delayed rectifier K+ current (I(K)) plays a key role in ceramide-induced neuronal apoptosis. Exposure for 6-10 h to the membrane-permeable C2-ceramide (25 microM) or to sphingomyelinase (0.2 unit/ml), but not to the inactive ceramide analogue C2-dihydroceramide (25 microM), enhanced the whole-cell I(K) current without affecting the transient A-type K+ current and increased caspase activity, followed by neuronal apoptosis 24 h after exposure onset. Tetraethylammonium (TEA) or 4-chloro-N,N-diethyl-N-heptylbenzenebutanaminium tosylate (clofilium), at concentrations inhibiting I(K), attenuated the C2-ceramide-induced caspase-3-like activation as well as neuronal apoptosis. Raising extracellular K+ to 25 mM similarly blocked the C2-ceramide-induced cell death; the neuroprotection by 25 mM K+ or TEA was not eliminated by blocking voltage-gated Ca2+ channels. An inhibitor of tyrosine kinases, herbimycin A (10 nM) or lavendustin A (0.1-1 microM), suppressed I(K) enhancement and/or apoptosis induced by C2-ceramide. It is suggested that ceramide-induced I(K) current enhancement is mediated by tyrosine phosphorylation and plays a critical role in neuronal apoptosis.
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Affiliation(s)
- S P Yu
- Center for the Study of Nervous System Injury and Department of Neurology, Washington University School of Medicine, St. Louis, Missouri, USA
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36
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Abstract
Sarcomas of the abdomen and pelvis are rare malignant mesenchymal neoplasms that often remain undiagnosed until they attain large size. Complete tumour resection is associated with improved patient survival. Detection and delineation of the tumour, its extent and its relationship with surrounding tissues are important for surgical planning. Radiography, barium studies, and intravenous urography are of limited value in the imaging diagnosis of abdominal and pelvic sarcomas. Ultrasound is sensitive for detecting neoplasms larger than 6 cm. Computed tomography is useful for detection, defining extent, and predicting resectability of the primary tumour, evaluation of response to treatment, and detecting recurrence and metastasis. Sarcomas are predominantly large, poorly demarcated, heterogeneous masses of muscle density with haemorrhage or necrosis.
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Affiliation(s)
- M H Pui
- Department of Radiology, First Affiliated Hospital of Sun Yat-Sen University of Medical Sciences, Guangzhou, People's Republic of China
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37
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Abstract
Neuronal death induced by activating N-methyl-D-aspartate (NMDA) receptors has been linked to Ca2+ and Na+ influx through associated channels. Whole-cell recording from cultured mouse cortical neurons revealed a NMDA-evoked outward current, INMDA-K, carried by K+ efflux at membrane potentials positive to -86 millivolts. Cortical neurons exposed to NMDA in medium containing reduced Na+ and Ca2+ (as found in ischemic brain tissue) lost substantial intracellular K+ and underwent apoptosis. Both K+ loss and apoptosis were attenuated by increasing extracellular K+, even when voltage-gated Ca2+ channels were blocked. Thus NMDA receptor-mediated K+ efflux may contribute to neuronal apoptosis after brain ischemia.
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Affiliation(s)
- S P Yu
- Center for the Study of Nervous System Injury and Department of Neurology, Washington University School of Medicine, St. Louis, MO 63110, USA
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38
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Abstract
Primary intrathoracic malignant fibrous histiocytoma and angiosarcoma are rare sarcomas constituting less than 0.2% of lung cancers. The typical imaging appearance is a large, well-circumscribed, non-cavitating, non-calcified, peripheral lung mass without hilar or mediastinal lymphadenopathy. Bronchoscopy and percutaneous needle aspiration are of limited value in differential diagnosis, and thoracotomy is warranted for definitive diagnosis.
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Affiliation(s)
- M H Pui
- Department of Radiology, First Affiliated Hospital of Sun Yat-Sen University of Medical Sciences, Guangzhou, People's Republic of China.
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39
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Yu SP, Farhangrazi ZS, Ying HS, Yeh CH, Choi DW. Enhancement of outward potassium current may participate in beta-amyloid peptide-induced cortical neuronal death. Neurobiol Dis 1998; 5:81-8. [PMID: 9746905 DOI: 10.1006/nbdi.1998.0186] [Citation(s) in RCA: 159] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
In light of recent evidence implicating the upregulation of outward K+ current in mediating several forms of neuronal apoptosis, we tested the hypothesis that such an upregulation might specifically contribute to the pathogenesis of beta-amyloid peptide (A beta)-induced neuronal death. Exposure to A beta fragment 25-35 (20 microM) or 1-42 (20 microM) enhanced the delayed rectifier K+ current IK, shifting its activation voltage relationship toward hyperpolarized levels and increasing maximal conductance, but did not affect the transient K+ current IA or charybdotoxin-sensitive BK current. Reducing IK by adding the channel blocker tetraethylammonium (TEA, 5 mM) or raising extracellular K+ to 25 mM attenuated A beta-induced neuronal death, even in the presence of nifedipine or gadolinium to block associated increases in Ca2+ influx. The IA blocker 4-aminopyridine (4-AP, 5 mM) and the CI- channel blocker anthracene-9-carboxylic acid (ACA, 500 microM) were not neuroprotective. These data raise the intriguing possibility that manipulations aimed at reducing outward K+ current may provide an approach to reducing neuronal degeneration in patients with Alzheimer's disease.
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Affiliation(s)
- S P Yu
- Center for the Study of Nervous System Injury, Washington University School of Medicine, St. Louis, Missouri 63110, USA
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40
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Abstract
Endogenous voltage-gated potassium currents were investigated in human embryonic kidney (HEK293) and Chinese hamster ovary (CHO) cells using whole-cell voltage clamp recording. Depolarizing voltage steps from -70 mV triggered an outwardly rectified current in nontransfected HEK293 cells. This current had an amplitude of 296 pA at +40 mV and a current density of 19.2 pA/pF. The outward current was eliminated by replacing internal K+ with Cs+ and suppressed by the K+ channel blockers tetraethylammonium and 4-aminopyridine. Raising external K+ attenuated the outward current and shifted the reversal potential towards positive potentials as predicted by the Nernst equation. The current had a fast activation phase but inactivated slowly. These features implicate delayed rectifier (I(K))-like channels as mediators of the observed current, which was comparable in size to I(K) currents in many other cells. A small native inward rectifier current but no transient outward current I(A), the M current I(M), or Ca2+-dependent K+ currents were detected in HEK293 cells. In contrast to these findings in HEK293 cells, little or no I(K)-like current was detected in CHO cells. The difference in endogenous voltage-activated currents in HEK293 and CHO cells suggest that CHO cell lines are a preferred system for exogenous K+ channel expression.
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Affiliation(s)
- S P Yu
- Department of Neurology, Center for the Study of Nervous System Injury, Washington University School of Medicine, St. Louis, Missouri 63110, USA.
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41
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Sensi SL, Canzoniero LM, Yu SP, Ying HS, Koh JY, Kerchner GA, Choi DW. Measurement of intracellular free zinc in living cortical neurons: routes of entry. J Neurosci 1997; 17:9554-64. [PMID: 9391010 PMCID: PMC6573416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
We used the ratioable fluorescent dye mag-fura-5 to measure intracellular free Zn2+ ([Zn2+]i) in cultured neocortical neurons exposed to neurotoxic concentrations of Zn2+ in concert with depolarization or glutamate receptor activation and identified four routes of Zn2+ entry. Neurons exposed to extracellular Zn2+ plus high K+ responded with a peak cell body signal corresponding to a [Zn2+]i of 35-45 nM. This increase in [Zn2+]i was attenuated by concurrent addition of Gd3+, verapamil, omega-conotoxin GVIA, or nimodipine, consistent with Zn2+ entry through voltage-gated Ca2+channels. Furthermore, under conditions favoring reverse operation of the Na+-Ca2+ exchanger, Zn2+ application induced a slow increase in [Zn2+]i and outward whole-cell current sensitive to benzamil-amiloride. Thus, a second route of Zn2+ entry into neurons may be via transporter-mediated exchange with intracellular Na+. Both NMDA and kainate also induced rapid increases in neuronal [Zn2+]i. The NMDA-induced increase was only partly sensitive to Gd3+ or to removal of extracellular Na+, consistent with a third route of entry directly through NMDA receptor-gated channels. The kainate-induced increase was highly sensitive to Gd3+ or Na+ removal in most neurons but insensitive in a minority subpopulation ("cobalt-positive cells"), suggesting that a fourth route of neuronal Zn2+ entry is through the Ca2+-permeable channels gated by certain subtypes of AMPA or kainate receptors.
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Affiliation(s)
- S L Sensi
- Center for the Study of Nervous System Injury and Department of Neurology, Washington University School of Medicine, St. Louis, Missouri 63110, USA
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42
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Yu SP, Yeh CH, Sensi SL, Gwag BJ, Canzoniero LM, Farhangrazi ZS, Ying HS, Tian M, Dugan LL, Choi DW. Mediation of neuronal apoptosis by enhancement of outward potassium current. Science 1997; 278:114-7. [PMID: 9311914 DOI: 10.1126/science.278.5335.114] [Citation(s) in RCA: 454] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Apoptosis of mouse neocortical neurons induced by serum deprivation or by staurosporine was associated with an early enhancement of delayed rectifier (IK) current and loss of total intracellular K+. This IK augmentation was not seen in neurons undergoing excitotoxic necrosis or in older neurons resistant to staurosporine-induced apoptosis. Attenuating outward K+ current with tetraethylammonium or elevated extracellular K+, but not blockers of Ca2+, Cl-, or other K+ channels, reduced apoptosis, even if associated increases in intracellular Ca2+ concentration were prevented. Furthermore, exposure to the K+ ionophore valinomycin or the K+-channel opener cromakalim induced apoptosis. Enhanced K+ efflux may mediate certain forms of neuronal apoptosis.
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Affiliation(s)
- S P Yu
- Center for the Study of Nervous System Injury and Department of Neurology, Washington University School of Medicine, St. Louis, MO 63110, USA
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43
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Abstract
Na(+)-Ca2+ exchanger-associated membrane currents were studied in cultured murine neocortical neurons, using whole-cell recording combined with intracellular perfusion. A net inward current specifically associated with forward (Na+(o)-Ca2+(i)) exchange was evoked at -40 mV by switching external 140 mM Li+ to 140 mM Na+. The voltage dependence of this current was consistent with that predicted for 3Na+:1Ca2+ exchange. As expected, the current depended on internal Ca2+, and could be blocked by intracellular application of the exchanger inhibitory peptide, XIP. Raising internal Na+ from 3 to 20 mM or switching the external solution from 140 mM Li+ to 30 mM Na+ activated outward currents, consistent with reverse (Na+(i)-Ca2+(o)) exchange. An external Ca2(+)-sensitive current was also identified as associated with reverse Na(+)-Ca2+ exchange based on its internal Na+ dependence and sensitivity to XIP. Combined application of external Na+ and Ca2+ in the absence of internal Na+ triggered a 3.3-fold larger inward current than the current activated in the presence of 3 mM internal Na+, raising the intriguing possibility that Na(+)-Ca2+ exchangers might concurrently operate in both the forward and the reverse direction, perhaps in different subcellular locations. With this idea in mind, we examined the effect of excitotoxic glutamate receptor activation on exchanger operation. After 3-5 min of exposure to 100-200 microM glutamate, the forward exchanger current was significantly increased even when external Na+ was reduced to 100 mM, and the external Ca2(+)-activated reverse exchanger current was eliminated.
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Affiliation(s)
- S P Yu
- Center for the Study of Nervous System Injury and Department of Neurology, Washington University School of Medicine, St. Louis, MO 63110, USA
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44
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Yu SP, Sensi SL, Canzoniero LM, Buisson A, Choi DW. Membrane-delimited modulation of NMDA currents by metabotropic glutamate receptor subtypes 1/5 in cultured mouse cortical neurons. J Physiol 1997; 499 ( Pt 3):721-32. [PMID: 9130168 PMCID: PMC1159290 DOI: 10.1113/jphysiol.1997.sp021964] [Citation(s) in RCA: 68] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
1. Modulation of NMDA receptors by metabotropic glutamate receptors (mGluRs) in cultured mouse cortical neurons was investigated using whole-cell and single-channel recordings. 2. NMDA whole-cell current was reversibly attenuated by selective mGluR1/5 agonists (S)-3-hydroxyphenylglycine (3HPG; 10-200 microM), (S)-3,5-dihydroxyphenylglyeine (S-DHPG; 100 microM) and other mGluR agonists: (1S,3R)-1-aminocyclopentane-1,3-decarboxylic acid (1S,3R-ACPD; 200 microM), quisqualate (10 microM) and (2S,1'S,2'S)-2-(carboxycyclopropyl)glycine (L-CCG-I; 100 microM). 3. The attenuation of NMDA current by 3HPG was totally eliminated by the mGluR antagonist (RS)-alpha-methyl-4-carboxyphenylglycine (MCPG; 500 microM) and by the selective mGluR1/5 antagonist (S)-4-carboxyphenylglycine (4CPG; 300 microM). 4. mGluR2/3 agonists (2S,1'R,2'R'3'R)-2-(2,3-dicarboxycyclopropyl)glycine (DCG-IV; 3 microM), (S)-4-carboxy-3-hydroxyphenylglycine (4C3HPG; 100-200 microM) and (S)-4-carboxyphenylglycine (4CPG; 300 microM) did not reduce NMDA current. 5. The NMDA-induced increase in intracellular free Ca2+ measured by fura-2 Ca2+ imaging was attenuated by 3HPG (300 microM). 6. The suppression of NMDA current by 3HPG was not affected by treatments that altered intracellular Ca2+ or cAMP levels, or by the protein kinase inhibitor, staurosporine (0.1-0.5 microM). 7. The open probability (NPo) of the NMDA receptor channel in excised outside-out patches was attenuated by 3HPG but not by 4C3HPG. This 3HPG effect was blocked by MCPG. 8. The 3HPG-induced reduction of NMDA whole-cell and single-channel currents was prevented by GDP beta S (200-400 microM). Intracellular dialysis of GTP gamma S (100 microM) also reduced NMDA whole-cell current, and rendered irreversible further reduction induced by 3HPG. 9. These data suggest that a selective activation of mGluR1/5 downmodulates the NMDA receptor channel in a membrane-delimited manner, mediated by G proteins, but not by diffusible second messengers.
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Affiliation(s)
- S P Yu
- Centre for the Study of Nervous System Injury, Washington University School of Medicine, St Louis, MO 63110, USA
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Dugan LL, Gabrielsen JK, Yu SP, Lin TS, Choi DW. Buckminsterfullerenol free radical scavengers reduce excitotoxic and apoptotic death of cultured cortical neurons. Neurobiol Dis 1996; 3:129-35. [PMID: 9173920 DOI: 10.1006/nbdi.1996.0013] [Citation(s) in RCA: 238] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Novel anti-oxidants based on the buckminsterfullerene molecule were explored as neuroprotective agents in cortical cell cultures exposed to excitotoxic and apoptotic injuries. Two polyhydroxylated C60 derivatives, C60(OH)n, n = 12, and C60(OH)nOm, n = 18-20, m = 3-7 hemiketal groups, demonstrated excellent anti-oxidant capabilities when tested by electron paramagnetic spectroscopy with a spin-trapping agent and a hydroxyl radical-generating system. These water-soluble agents decreased excitotoxic neuronal death following brief exposure to NMDA (by 80%), alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid (AMPA; by 65%), or kainate (by 50%). Electrophysiology and tracer 45Ca(2+)-uptake studies verified that buckminsterfullerenois are not NMDA or AMPA/kainate receptor antagonists. Buckminsterfullerenols also reduced neuronal apoptosis induced by serum deprivation. These results support the idea that oxidative stress contributes to both excitotoxic and apoptotic neuronal death, and furthermore suggest that fullerenols represent a novel type of biological anti-oxidant compound.
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Affiliation(s)
- L L Dugan
- Center for the Study of Nervous System Injury, Washington University School of Medicine, St. Louis, Missouri 63110, USA
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Abstract
Molecular cloning has revealed the existence of at least eight subtypes of metabotropic glutamate receptors (mGluRs). We examined the effect of (2S,1'R,2'R,3'R)-2-(2,3-dicarboxycyclopropyl)glycine (DCG-IV), a selective agonist of the mGluR 2/3 subtype, on excitotoxicity in mouse cortical cell cultures. Addition of DCG-IV to the exposure medium partially attenuated the rapidly triggered excitotoxic death induced by a 5 min exposure to 200 microM NMDA. This neuroprotective effect was reversed by coapplication of alpha-methyl-4-carboxyphenylglycine (MCPG), an antagonist of mGluRs, by pertussis toxin pretreatment and also by preincubation with dibutyryl cAMP, a stable analogue of cAMP. These results suggest that the activation of mGluR 2/3 is neuroprotective in our system. However, DCG-IV did not attenuate the slowly triggered neuronal death induced by 24 h exposure to low concentrations of NMDA, alpha-amino-1,3-cyclopentanedicarboxylic acid (AMPA) or kainate. The failure of DCG-IV to block slowly triggered NMDA neurotoxicity is likely due to weak NMDA agonist activity, as demonstrated in whole-cell recording.
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Affiliation(s)
- A Buisson
- Department of Neurology, Washington University School of Medicine, St Louis, MO 63110, USA
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Abstract
1. M-current (IM) is regulated by intracellular free Ca2+ ([Ca2+]i). Suppression and overrecovery of IM induced by muscarine and luteinizing-hormone releasing hormone (LHRH) are also regulated by [Ca2+]i. The role of the arachidonic acid (AA) pathway in the Ca(2+)-dependent modulation of IM was investigated using whole-cell voltage clamp and intracellular perfusion in dissociated bullfrog sympathetic B neurons. 2. Quinacrine (10-20 microM) and 4-bromophenacyl bromide (4-BPB; 4-10 microM), the inhibitors of phospholipase A2, blocked the enhancement of IM evoked by raising [Ca2+]i. 3. AA (6-120 microM) increased IM by about 50% of the control current in a Ca(2+)-dependent manner. 4. Enhancements of IM by Ca2+ and AA were blocked by the lipoxygenase (LO) inhibitors nordihydroguaiaretic acid (NDGA; 1-5 microM) and 5,8,11-eicosatrynoic acid (ETI; 10 microM). The cyclo-oxygenase inhibitor indomethacin (10 microM) had no effect. 5. Enhancement of IM by Ca2+ was abolished by the selective 12-LO inhibitors baicalein (1-2 microM) and 15(S)-hydroxy-5-cis-8-cis-11-cis-13-trans-eicosatetraenoic acid (15-HETE; 6.5 microM). A 12-LO product, 2(S)-hydroxy-5-cis-8-cis-10-trans-14-cis- eicosatetraenoic acid (12-HETE; 13-20 microM), increased IM without Ca2+ requirement. 6. Enhancement of IM by Ca2+ was not affected by the selective 5-LO inhibitors AA-861 (10 microM), 5,6-dehydroarachidonic acid (5,6-DAA, 10 microM) and L-651,896 (10 microM). The 5-LO metabolites leukotriene C4 (1.5-8 microM) and leukotriene B4 (1.5-5 microM) showed no obvious effect on IM. 7. NDGA alone inhibited IM with an IC50 of 0.73 microM at 120 nM Cai(2+). 8. NDGA did not affect suppression of IM by muscarine or LHRH; however, overrecovery of IM upon removing these agonists was totally eliminated by 1 microM NDGA. 9. Inhibitors of phosphatases, calyculin A (0.1 microM) and okadaic acid (1 microM), completely abolished overrecovery of IM. Calyculin A also blocked the Ca(2+)-induced IM enhancement. 10. It is suggested that Ca2+ enhances IM by stimulating the AA metabolic pathway. Dephosphorylation probably upregulates IM. Overrecovery of IM is probably a result of stimulation of the LO pathway and phosphatases by increased [Ca2+]i.
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Affiliation(s)
- S P Yu
- Howard Hughes Medical Institute, Department of Neurobiology and Behavior, State University of New York at Stony Brook 11794, USA
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Lynch JJ, Yu SP, Canzoniero LM, Sensi SL, Choi DW. Sodium channel blockers reduce oxygen-glucose deprivation-induced cortical neuronal injury when combined with glutamate receptor antagonists. J Pharmacol Exp Ther 1995; 273:554-60. [PMID: 7714811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Blockers of voltage-gated Na+ channels can protect central neuronal axons from hypoxic injury in vitro but have shown limited neuroprotective effects on neurons, where substantial injury is mediated by glutamate receptors. We explored the ability of several voltage-gated Na+ channel blockers to protect murine cultured cortical neurons from injury induced by oxygen-glucose deprivation. Whole-cell recordings from neurons revealed two types of Na+ currents activated by membrane depolarization: one rapidly inactivating and the other noninactivating. Both currents were blocked by tetrodotoxin (TTX) and 5,5-diphenylhydantoin (phenytoin). Fluorescent imaging using the Na(+)-selective dye SBFI confirmed that TTX attenuated the increase in intracellular free Na+ induced by oxygen-glucose deprivation. Addition of TTX (1 microM) but not phenytoin (10-100 microM) produced a small and variable reduction in neuronal death subsequent to oxygen-glucose deprivation for 40 to 50 min. Blockade of glutamate neurotoxicity by combined addition of MK-801, 7-chlorokynurenate and 6-cyano-7-nitroquinoxaline-2,3-dione markedly reduced injury such that prolonged deprivation times (75-100 min) were needed to induce widespread neuronal death. In this setting of glutamate receptor blockade, addition of TTX, phenytoin or one of several other Na+ channel blockers--lidocaine (100 microM), QX-314 (1 mM), quinidine (100 microM) or lorcainide (10 or 100 microM)--all further reduced neuronal death. Present results raise the possibility that Na+ channel blockers may be useful in protecting gray matter from hypoxic-ischemic injury, especially when combined with antiexcitotoxic approaches.
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Affiliation(s)
- J J Lynch
- Department of Neurology, Washington University School of Medicine, St. Louis, Missouri, USA
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Gubitosi-Klug RA, Yu SP, Choi DW, Gross RW. Concomitant acceleration of the activation and inactivation kinetics of the human delayed rectifier K+ channel (Kv1.1) by Ca(2+)-independent phospholipase A2. J Biol Chem 1995; 270:2885-8. [PMID: 7852365 DOI: 10.1074/jbc.270.7.2885] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The electrophysiologic sequelae of arachidonic acid release mediated by the major phospholipase A2 (PLA2) in electrically active tissues (i.e. the 40-kDa Ca(2+)-independent PLA2) were assessed in Sf9 cells expressing the human recombinant delayed rectifier K+ channel Kv1.1. Intracellular administration of Ca(2+)-independent PLA2 increased the rate of activation of the macroscopic current (from tau act = 6.25 +/- 0.76 ms to tau act, PLA2 = 2.78 +/- 0.78 ms at 40 mV) and resulted in channel inactivation (from no observed inactivation to tau inact = 103 +/- 6 ms at 40 mV), which were: 1) dependent on the enrichment of Sf9 cell phospholipids in esterified arachidonic acid; 2) ablated by pretreatment of the PLA2 by the mechanism-based inhibitor (E)-6-(bromomethylene)-3-(1-naphthalenyl)-2H-tetrahydropyran-2-one; and 3) manifest prior to development of alterations in cellular permeability. The bidirectional effects of Ca(2+)-independent PLA2 were indistinguishable from the effects of exogenously applied arachidonic acid (AA), which specifically and reversibly increased the rates of channel activation (from tau act = 5.73 +/- 0.88 ms to tau act,AA = 1.91 +/- 0.39 ms at 40 mV) and inactivation (from no observed inactivation to tau inact = 76.6 +/- 1.4 ms at 40 mV). These electrophysiologic alterations resulted from the effects of arachidonic acid per se since Sf9 cells did not produce oxygenated eicosanoid metabolites, and neither exogenous administration nor in situ generation of other fatty acids resulted in these effects. Collectively, these results unambiguously demonstrate the role of arachidonic acid per se on Kv1.1 electrophysiologic function and suggest the importance of Ca(2+)-independent PLAs as an enzymic modulator of ion channel function in electrically active tissues.
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Affiliation(s)
- R A Gubitosi-Klug
- Department of Medicine, Washington University School of Medicine, St. Louis, Missouri 63110
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Yu SP, O'Malley DM, Adams PR. Regulation of M current by intracellular calcium in bullfrog sympathetic ganglion neurons. J Neurosci 1994; 14:3487-99. [PMID: 8207467 PMCID: PMC6576930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Regulation of M current (lM) by intracellular free calcium was studied in dissociated bullfrog sympathetic ganglion B cells using whole-cell recording, intracellular perfusion, and confocal calcium imaging. BAPTA (20 mM) and appropriate amounts of calcium were added to pipette solutions to clamp calcium at different levels. A high concentration of BAPTA itself mildly inhibited lM. Intracellular perfusion effectively controlled cellular free calcium; this was confirmed by confocal imaging with the calcium indicator fluo-3. In a calcium-free environment (no calcium added to either side of the cell membrane), average lM was 166 pA. Raising intracellular free calcium to 60 nM or higher reversibly enhanced lM by more than 100%. The maximum M conductance doubled upon raising calcium from 0 to 120 nM, and was accompanied by a -11 mV shift of the half-activation voltage. The kinetics of the closing and reopening relaxations of lM were also altered by raising calcium. Enhancement of lM by calcium required ATP in the pipette. TEA (5 mM) and d-tubocurarine (d-TC; 100 microM) did not alter the calcium effect, indicating that it was the M current being modulated and not other K+ currents. High calcium (450 nM) reduced lM. The up- and downregulation of lM paralleled the increases and decreases of fluorescence intensity observed via calcium imaging. Changing extracellular calcium had no significant effect on lM or cellular fluorescence. The role of calcium in muscarinic and peptidergic modulation of lM was also explored. Muscarine (1 or 10 microM) inhibited lM less at zero calcium than at higher calcium. Nearly complete suppression occurred with 120 nM calcium in the presence of 20 mM BAPTA. lM overrecovered upon washout of muscarine at 120 nM calcium, while little overrecovery of lM developed at zero calcium. Similar effects were observed at zero and 120 nM calcium when using the peptide LHRH to inhibit lM. We conclude that the absolute level of free calcium determines the size of lM, and that a minimum sustained level of calcium is required both for optimal suppression of lM by muscarine and for overrecovery. While our data suggest that resting calcium levels play a permissive role in muscarinic suppression, an additional role for agonist-induced calcium increases cannot be ruled out.
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Affiliation(s)
- S P Yu
- Howard Hughes Medical Institute, Department of Neurobiology and Behavior, State University of New York at Stony Brook 11794-5230
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