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Gasparian A, Aksenova M, Oliver D, Levina E, Doran R, Lucius M, Piroli G, Oleinik N, Ogretmen B, Mythreye K, Frizzell N, Broude E, Wyatt MD, Shtutman M. Depletion of COPI in cancer cells: the role of reactive oxygen species in the induction of lipid accumulation, noncanonical lipophagy and apoptosis. Mol Biol Cell 2022; 33:ar135. [PMID: 36222847 PMCID: PMC9727790 DOI: 10.1091/mbc.e21-08-0420] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The coatomer protein complex 1 (COPI) is a multisubunit complex that coats intracellular vesicles and is involved in intracellular protein trafficking. Recently we and others found that depletion of COPI complex subunits zeta (COPZ1) and delta (ARCN1) preferentially kills tumor cells relative to normal cells. Here we delineate the specific cellular effects and sequence of events of COPI complex depletion in tumor cells. We find that this depletion leads to the inhibition of mitochondrial oxidative phosphorylation and the elevation of reactive oxygen species (ROS) production, followed by accumulation of lipid droplets (LDs) and autophagy-associated proteins LC3-II and SQSTM1/p62 and, finally, apoptosis of the tumor cells. Inactivation of ROS in COPI-depleted cells with the mitochondrial-specific quencher, mitoquinone mesylate, attenuated apoptosis and markedly decreased both the size and the number of LDs. COPI depletion caused ROS-dependent accumulation of LC3-II and SQSTM1 which colocalizes with LDs. Lack of double-membrane autophagosomes and insensitivity to Atg5 deletion suggested an accumulation of a microlipophagy complex on the surface of LDs induced by depletion of the COPI complex. Our findings suggest a sequence of cellular events triggered by COPI depletion, starting with inhibition of oxidative phosphorylation, followed by ROS activation and accumulation of LDs and apoptosis.
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Affiliation(s)
- A. Gasparian
- Department of Drug Discovery and Biomedical Sciences, College of Pharmacy, University of South Carolina, Columbia, SC 29208
| | - M. Aksenova
- Department of Drug Discovery and Biomedical Sciences, College of Pharmacy, University of South Carolina, Columbia, SC 29208
| | - D. Oliver
- Department of Drug Discovery and Biomedical Sciences, College of Pharmacy, University of South Carolina, Columbia, SC 29208
| | - E. Levina
- Department of Biological Sciences College of Art and Science, University of South Carolina, Columbia, SC 29208
| | - R. Doran
- Department of Drug Discovery and Biomedical Sciences, College of Pharmacy, University of South Carolina, Columbia, SC 29208
| | - M. Lucius
- Department of Drug Discovery and Biomedical Sciences, College of Pharmacy, University of South Carolina, Columbia, SC 29208
| | - G. Piroli
- Department of Pharmacology, Physiology & Neuroscience, School of Medicine, University of South Carolina, Columbia, SC 29208
| | - N. Oleinik
- Department of Biochemistry and Molecular Biology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425
| | - B. Ogretmen
- Department of Biochemistry and Molecular Biology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425
| | - K. Mythreye
- Department of Pathology, Division of Molecular and Cellular Pathology, University of Alabama at Birmingham, Birmingham, AL 35233
| | - N. Frizzell
- Department of Pharmacology, Physiology & Neuroscience, School of Medicine, University of South Carolina, Columbia, SC 29208
| | - E. Broude
- Department of Drug Discovery and Biomedical Sciences, College of Pharmacy, University of South Carolina, Columbia, SC 29208
| | - M. D. Wyatt
- Department of Drug Discovery and Biomedical Sciences, College of Pharmacy, University of South Carolina, Columbia, SC 29208
| | - M. Shtutman
- Department of Drug Discovery and Biomedical Sciences, College of Pharmacy, University of South Carolina, Columbia, SC 29208,*Address correspondence to: M. Shtutman ()
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2
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Larin I, Zhang Y, Gasparian A, Gan L, Miskimen R, Khandaker M, Dale D, Danagoulian S, Pasyuk E, Gao H, Ahmidouch A, Ambrozewicz P, Baturin V, Burkert V, Clinton E, Deur A, Dolgolenko A, Dutta D, Fedotov G, Feng J, Gevorkyan S, Glamazdin A, Guo L, Isupov E, Ito MM, Klein F, Kowalski S, Kubarovsky A, Kubarovsky V, Lawrence D, Lu H, Ma L, Matveev V, Morrison B, Micherdzinska A, Nakagawa I, Park K, Pedroni R, Phelps W, Protopopescu D, Rimal D, Romanov D, Salgado C, Shahinyan A, Sober D, Stepanyan S, Tarasov VV, Taylor S, Vasiliev A, Wood M, Ye L, Zihlmann B. Precision measurement of the neutral pion lifetime. Science 2020; 368:506-509. [PMID: 32355026 DOI: 10.1126/science.aay6641] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 03/30/2020] [Indexed: 11/02/2022]
Abstract
The explicit breaking of the axial symmetry by quantum fluctuations gives rise to the so-called axial anomaly. This phenomenon is solely responsible for the decay of the neutral pion π0 into two photons (γγ), leading to its unusually short lifetime. We precisely measured the decay width Γ of the [Formula: see text] process. The differential cross sections for π0 photoproduction at forward angles were measured on two targets, carbon-12 and silicon-28, yielding [Formula: see text], where stat. denotes the statistical uncertainty and syst. the systematic uncertainty. We combined the results of this and an earlier experiment to generate a weighted average of [Formula: see text] Our final result has a total uncertainty of 1.50% and confirms the prediction based on the chiral anomaly in quantum chromodynamics.
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Affiliation(s)
- I Larin
- Alikhanov Institute for Theoretical and Experimental Physics, National Research Center (NRC) "Kurchatov Institute," Moscow, 117218, Russia.,Department of Physics, University of Massachusetts, Amherst, MA 01003, USA
| | - Y Zhang
- Department of Physics, Duke University, Durham, NC 27708, USA.,Triangle Universities Nuclear Laboratory, Durham, NC 27708, USA
| | - A Gasparian
- Department of Physics, North Carolina A&T State University, Greensboro, NC 27411, USA.
| | - L Gan
- Department of Physics and Physical Oceanography, University of North Carolina Wilmington, Wilmington, NC 28403, USA
| | - R Miskimen
- Department of Physics, University of Massachusetts, Amherst, MA 01003, USA
| | - M Khandaker
- Department of Physics, Norfolk State University, Norfolk, VA 23504, USA
| | - D Dale
- Department of Physics and Nuclear Engineering, Idaho State University, Pocatello, ID 83209, USA
| | - S Danagoulian
- Department of Physics, North Carolina A&T State University, Greensboro, NC 27411, USA
| | - E Pasyuk
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
| | - H Gao
- Department of Physics, Duke University, Durham, NC 27708, USA.,Triangle Universities Nuclear Laboratory, Durham, NC 27708, USA
| | - A Ahmidouch
- Department of Physics, North Carolina A&T State University, Greensboro, NC 27411, USA
| | - P Ambrozewicz
- Department of Physics, North Carolina A&T State University, Greensboro, NC 27411, USA
| | - V Baturin
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
| | - V Burkert
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
| | - E Clinton
- Department of Physics, University of Massachusetts, Amherst, MA 01003, USA
| | - A Deur
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
| | - A Dolgolenko
- Alikhanov Institute for Theoretical and Experimental Physics, National Research Center (NRC) "Kurchatov Institute," Moscow, 117218, Russia
| | - D Dutta
- Department of Physics and Astronomy, Mississippi State University, Mississippi State, MS 39762, USA
| | - G Fedotov
- Department of Physics, Moscow State University, Moscow 119991, Russia.,B. P. Konstantinov Petersburg Nuclear Physics Institute, NRC "Kurchatov Institute," Gatchina, St. Petersburg, 188300, Russia
| | - J Feng
- Department of Physics and Physical Oceanography, University of North Carolina Wilmington, Wilmington, NC 28403, USA
| | - S Gevorkyan
- Joint Institute for Nuclear Research, Dubna, 141980, Russia
| | - A Glamazdin
- Kharkov Institute of Physics and Technology, Kharkov, 310108, Ukraine
| | - L Guo
- Department of Physics, Florida International University, Miami, FL 33199, USA
| | - E Isupov
- Department of Physics, Moscow State University, Moscow 119991, Russia
| | - M M Ito
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
| | - F Klein
- Department of Physics, The Catholic University of America, Washington, DC 20064, USA
| | - S Kowalski
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - A Kubarovsky
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
| | - V Kubarovsky
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
| | - D Lawrence
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
| | - H Lu
- Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - L Ma
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China
| | - V Matveev
- Alikhanov Institute for Theoretical and Experimental Physics, National Research Center (NRC) "Kurchatov Institute," Moscow, 117218, Russia
| | - B Morrison
- Department of Physics, Arizona State University, Tempe, AZ 85281, USA
| | - A Micherdzinska
- Department of Physics, George Washington University, Washington, DC 20064, USA
| | - I Nakagawa
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - K Park
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
| | - R Pedroni
- Department of Physics, North Carolina A&T State University, Greensboro, NC 27411, USA
| | - W Phelps
- Department of Physics, Computer Science and Engineering, Christopher Newport University, Newport News, VA 23606, USA
| | - D Protopopescu
- School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, UK
| | - D Rimal
- Department of Physics, Florida International University, Miami, FL 33199, USA
| | - D Romanov
- Department of Physics, Moscow Engineering Physics Institute, Moscow, Russia
| | - C Salgado
- Department of Physics, Norfolk State University, Norfolk, VA 23504, USA
| | - A Shahinyan
- Yerevan Physics Institute, Yerevan 0036, Armenia
| | - D Sober
- Department of Physics, The Catholic University of America, Washington, DC 20064, USA
| | - S Stepanyan
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
| | - V V Tarasov
- Alikhanov Institute for Theoretical and Experimental Physics, National Research Center (NRC) "Kurchatov Institute," Moscow, 117218, Russia
| | - S Taylor
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
| | - A Vasiliev
- Institute for High Energy Physics, NRC "Kurchatov Institute," Protvino, 142281, Russia
| | - M Wood
- Department of Physics, University of Massachusetts, Amherst, MA 01003, USA
| | - L Ye
- Department of Physics and Astronomy, Mississippi State University, Mississippi State, MS 39762, USA
| | - B Zihlmann
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
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Xiong W, Gasparian A, Gao H, Dutta D, Khandaker M, Liyanage N, Pasyuk E, Peng C, Bai X, Ye L, Gnanvo K, Gu C, Levillain M, Yan X, Higinbotham DW, Meziane M, Ye Z, Adhikari K, Aljawrneh B, Bhatt H, Bhetuwal D, Brock J, Burkert V, Carlin C, Deur A, Di D, Dunne J, Ekanayaka P, El-Fassi L, Emmich B, Gan L, Glamazdin O, Kabir ML, Karki A, Keith C, Kowalski S, Lagerquist V, Larin I, Liu T, Liyanage A, Maxwell J, Meekins D, Nazeer SJ, Nelyubin V, Nguyen H, Pedroni R, Perdrisat C, Pierce J, Punjabi V, Shabestari M, Shahinyan A, Silwal R, Stepanyan S, Subedi A, Tarasov VV, Ton N, Zhang Y, Zhao ZW. A small proton charge radius from an electron-proton scattering experiment. Nature 2019; 575:147-150. [PMID: 31695211 DOI: 10.1038/s41586-019-1721-2] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 09/19/2019] [Indexed: 11/09/2022]
Abstract
Elastic electron-proton scattering (e-p) and the spectroscopy of hydrogen atoms are the two methods traditionally used to determine the proton charge radius, rp. In 2010, a new method using muonic hydrogen atoms1 found a substantial discrepancy compared with previous results2, which became known as the 'proton radius puzzle'. Despite experimental and theoretical efforts, the puzzle remains unresolved. In fact, there is a discrepancy between the two most recent spectroscopic measurements conducted on ordinary hydrogen3,4. Here we report on the proton charge radius experiment at Jefferson Laboratory (PRad), a high-precision e-p experiment that was established after the discrepancy was identified. We used a magnetic-spectrometer-free method along with a windowless hydrogen gas target, which overcame several limitations of previous e-p experiments and enabled measurements at very small forward-scattering angles. Our result, rp = 0.831 ± 0.007stat ± 0.012syst femtometres, is smaller than the most recent high-precision e-p measurement5 and 2.7 standard deviations smaller than the average of all e-p experimental results6. The smaller rp we have now measured supports the value found by two previous muonic hydrogen experiments1,7. In addition, our finding agrees with the revised value (announced in 2019) for the Rydberg constant8-one of the most accurately evaluated fundamental constants in physics.
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Affiliation(s)
- W Xiong
- Duke University and Triangle Universities Nuclear Laboratory, Durham, NC, USA
| | - A Gasparian
- North Carolina A&T State University, Greensboro, NC, USA.
| | - H Gao
- Duke University and Triangle Universities Nuclear Laboratory, Durham, NC, USA
| | - D Dutta
- Mississippi State University, Mississippi State, MS, USA.
| | | | - N Liyanage
- University of Virginia, Charlottesville, VA, USA
| | - E Pasyuk
- Thomas Jefferson National Accelerator Facility, Newport News, VA, USA
| | - C Peng
- Duke University and Triangle Universities Nuclear Laboratory, Durham, NC, USA
| | - X Bai
- University of Virginia, Charlottesville, VA, USA
| | - L Ye
- Mississippi State University, Mississippi State, MS, USA
| | - K Gnanvo
- University of Virginia, Charlottesville, VA, USA
| | - C Gu
- Duke University and Triangle Universities Nuclear Laboratory, Durham, NC, USA
| | - M Levillain
- North Carolina A&T State University, Greensboro, NC, USA
| | - X Yan
- Duke University and Triangle Universities Nuclear Laboratory, Durham, NC, USA
| | - D W Higinbotham
- Thomas Jefferson National Accelerator Facility, Newport News, VA, USA
| | - M Meziane
- Duke University and Triangle Universities Nuclear Laboratory, Durham, NC, USA
| | - Z Ye
- Duke University and Triangle Universities Nuclear Laboratory, Durham, NC, USA.,Argonne National Laboratory, Lemont, IL, USA
| | - K Adhikari
- Mississippi State University, Mississippi State, MS, USA
| | - B Aljawrneh
- North Carolina A&T State University, Greensboro, NC, USA
| | - H Bhatt
- Mississippi State University, Mississippi State, MS, USA
| | - D Bhetuwal
- Mississippi State University, Mississippi State, MS, USA
| | - J Brock
- Thomas Jefferson National Accelerator Facility, Newport News, VA, USA
| | - V Burkert
- Thomas Jefferson National Accelerator Facility, Newport News, VA, USA
| | - C Carlin
- Thomas Jefferson National Accelerator Facility, Newport News, VA, USA
| | - A Deur
- Thomas Jefferson National Accelerator Facility, Newport News, VA, USA
| | - D Di
- University of Virginia, Charlottesville, VA, USA
| | - J Dunne
- Mississippi State University, Mississippi State, MS, USA
| | - P Ekanayaka
- Mississippi State University, Mississippi State, MS, USA
| | - L El-Fassi
- Mississippi State University, Mississippi State, MS, USA
| | - B Emmich
- Mississippi State University, Mississippi State, MS, USA
| | - L Gan
- University of North Carolina, Wilmington, NC, USA
| | - O Glamazdin
- Kharkov Institute of Physics and Technology, Kharkov, Ukraine
| | - M L Kabir
- Mississippi State University, Mississippi State, MS, USA
| | - A Karki
- Mississippi State University, Mississippi State, MS, USA
| | - C Keith
- Thomas Jefferson National Accelerator Facility, Newport News, VA, USA
| | - S Kowalski
- Massachusetts Institute of Technology, Cambridge, MA, USA
| | | | - I Larin
- Alikhanov Institute for Theoretical and Experimental Physics NRC "Kurchatov Institute", Moscow, Russia.,University of Massachusetts, Amherst, MA, USA
| | - T Liu
- Duke University and Triangle Universities Nuclear Laboratory, Durham, NC, USA
| | | | - J Maxwell
- Thomas Jefferson National Accelerator Facility, Newport News, VA, USA
| | - D Meekins
- Thomas Jefferson National Accelerator Facility, Newport News, VA, USA
| | | | - V Nelyubin
- University of Virginia, Charlottesville, VA, USA
| | - H Nguyen
- University of Virginia, Charlottesville, VA, USA
| | - R Pedroni
- North Carolina A&T State University, Greensboro, NC, USA
| | - C Perdrisat
- College of William and Mary, Williamsburg, VA, USA
| | - J Pierce
- Thomas Jefferson National Accelerator Facility, Newport News, VA, USA
| | - V Punjabi
- Norfolk State University, Norfolk, VA, USA
| | - M Shabestari
- Mississippi State University, Mississippi State, MS, USA
| | | | - R Silwal
- Massachusetts Institute of Technology, Cambridge, MA, USA
| | - S Stepanyan
- Thomas Jefferson National Accelerator Facility, Newport News, VA, USA
| | - A Subedi
- Mississippi State University, Mississippi State, MS, USA
| | - V V Tarasov
- Alikhanov Institute for Theoretical and Experimental Physics NRC "Kurchatov Institute", Moscow, Russia
| | - N Ton
- University of Virginia, Charlottesville, VA, USA
| | - Y Zhang
- Duke University and Triangle Universities Nuclear Laboratory, Durham, NC, USA
| | - Z W Zhao
- Duke University and Triangle Universities Nuclear Laboratory, Durham, NC, USA
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4
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Ali A, Amaryan M, Anassontzis EG, Austregesilo A, Baalouch M, Barbosa F, Barlow J, Barnes A, Barriga E, Beattie TD, Berdnikov VV, Black T, Boeglin W, Boer M, Briscoe WJ, Britton T, Brooks WK, Cannon BE, Cao N, Chudakov E, Cole S, Cortes O, Crede V, Dalton MM, Daniels T, Deur A, Dobbs S, Dolgolenko A, Dotel R, Dugger M, Dzhygadlo R, Egiyan H, Ernst A, Eugenio P, Fanelli C, Fegan S, Foda AM, Foote J, Frye J, Furletov S, Gan L, Gasparian A, Gauzshtein V, Gevorgyan N, Gleason C, Goetzen K, Goncalves A, Goryachev VS, Guo L, Hakobyan H, Hamdi A, Han S, Hardin J, Huber GM, Hurley A, Ireland DG, Ito MM, Jarvis NS, Jones RT, Kakoyan V, Kalicy G, Kamel M, Kourkoumelis C, Kuleshov S, Kuznetsov I, Larin I, Lawrence D, Lersch DI, Li H, Li W, Liu B, Livingston K, Lolos GJ, Lyubovitskij V, Mack D, Marukyan H, Matveev V, McCaughan M, McCracken M, McGinley W, McIntyre J, Meyer CA, Miskimen R, Mitchell RE, Mokaya F, Nerling F, Ng L, Ostrovidov AI, Papandreou Z, Patsyuk M, Pauli P, Pedroni R, Pentchev L, Peters KJ, Phelps W, Pooser E, Qin N, Reinhold J, Ritchie BG, Robison L, Romanov D, Romero C, Salgado C, Schertz AM, Schumacher RA, Schwiening J, Seth KK, Shen X, Shepherd MR, Smith ES, Sober DI, Somov A, Somov S, Soto O, Stevens JR, Strakovsky II, Suresh K, Tarasov V, Taylor S, Teymurazyan A, Thiel A, Vasileiadis G, Werthmüller D, Whitlatch T, Wickramaarachchi N, Williams M, Xiao T, Yang Y, Zarling J, Zhang Z, Zhao G, Zhou Q, Zhou X, Zihlmann B. First Measurement of Near-Threshold J/ψ Exclusive Photoproduction off the Proton. Phys Rev Lett 2019; 123:072001. [PMID: 31491124 DOI: 10.1103/physrevlett.123.072001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 07/05/2019] [Indexed: 05/24/2023]
Abstract
We report on the measurement of the γp→J/ψp cross section from E_{γ}=11.8 GeV down to the threshold at 8.2 GeV using a tagged photon beam with the GlueX experiment. We find that the total cross section falls toward the threshold less steeply than expected from two-gluon exchange models. The differential cross section dσ/dt has an exponential slope of 1.67±0.39 GeV^{-2} at 10.7 GeV average energy. The LHCb pentaquark candidates P_{c}^{+} can be produced in the s channel of this reaction. We see no evidence for them and set model-dependent upper limits on their branching fractions B(P_{c}^{+}→J/ψp) and cross sections σ(γp→P_{c}^{+})×B(P_{c}^{+}→J/ψp).
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Affiliation(s)
- A Ali
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - M Amaryan
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - E G Anassontzis
- National and Kapodistrian University of Athens, 15771 Athens, Greece
| | - A Austregesilo
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - M Baalouch
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - F Barbosa
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - J Barlow
- Florida State University, Tallahassee, Florida 32306, USA
| | - A Barnes
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - E Barriga
- Florida State University, Tallahassee, Florida 32306, USA
| | - T D Beattie
- University of Regina, Regina, Saskatchewan, Canada S4S 0A2
| | - V V Berdnikov
- National Research Nuclear University Moscow Engineering Physics Institute, Moscow 115409, Russia
| | - T Black
- University of North Carolina at Wilmington, Wilmington, North Carolina 28403, USA
| | - W Boeglin
- Florida International University, Miami, Florida 33199, USA
| | - M Boer
- The Catholic University of America, Washington, D.C. 20064, USA
| | - W J Briscoe
- The George Washington University, Washington, D.C. 20052, USA
| | - T Britton
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - W K Brooks
- Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile
| | - B E Cannon
- Florida State University, Tallahassee, Florida 32306, USA
| | - N Cao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - E Chudakov
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - S Cole
- Arizona State University, Tempe, Arizona 85287, USA
| | - O Cortes
- The George Washington University, Washington, D.C. 20052, USA
| | - V Crede
- Florida State University, Tallahassee, Florida 32306, USA
| | - M M Dalton
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - T Daniels
- University of North Carolina at Wilmington, Wilmington, North Carolina 28403, USA
| | - A Deur
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - S Dobbs
- Florida State University, Tallahassee, Florida 32306, USA
| | - A Dolgolenko
- National Research Centre Kurchatov Institute, Institute for Theoretical and Experimental Physics, Moscow 117259, Russia
| | - R Dotel
- Florida International University, Miami, Florida 33199, USA
| | - M Dugger
- Arizona State University, Tempe, Arizona 85287, USA
| | - R Dzhygadlo
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - H Egiyan
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - A Ernst
- Florida State University, Tallahassee, Florida 32306, USA
| | - P Eugenio
- Florida State University, Tallahassee, Florida 32306, USA
| | - C Fanelli
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - S Fegan
- The George Washington University, Washington, D.C. 20052, USA
| | - A M Foda
- University of Regina, Regina, Saskatchewan, Canada S4S 0A2
| | - J Foote
- Indiana University, Bloomington, Indiana 47405, USA
| | - J Frye
- Indiana University, Bloomington, Indiana 47405, USA
| | - S Furletov
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - L Gan
- University of North Carolina at Wilmington, Wilmington, North Carolina 28403, USA
| | - A Gasparian
- North Carolina A&T State University, Greensboro, North Carolina 27411, USA
| | - V Gauzshtein
- Tomsk State University, 634050 Tomsk, Russia
- Tomsk Polytechnic University, 634050 Tomsk, Russia
| | - N Gevorgyan
- A.I. Alikhanian National Science Laboratory (Yerevan Physics Institute), 0036 Yerevan, Armenia
| | - C Gleason
- Indiana University, Bloomington, Indiana 47405, USA
| | - K Goetzen
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - A Goncalves
- Florida State University, Tallahassee, Florida 32306, USA
| | - V S Goryachev
- National Research Centre Kurchatov Institute, Institute for Theoretical and Experimental Physics, Moscow 117259, Russia
| | - L Guo
- Florida International University, Miami, Florida 33199, USA
| | - H Hakobyan
- Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile
| | - A Hamdi
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - S Han
- Wuhan University, Wuhan, Hubei 430072, People's Republic of China
| | - J Hardin
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - G M Huber
- University of Regina, Regina, Saskatchewan, Canada S4S 0A2
| | - A Hurley
- College of William and Mary, Williamsburg, Virginia 23185, USA
| | - D G Ireland
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - M M Ito
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - N S Jarvis
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - R T Jones
- University of Connecticut, Storrs, Connecticut 06269, USA
| | - V Kakoyan
- A.I. Alikhanian National Science Laboratory (Yerevan Physics Institute), 0036 Yerevan, Armenia
| | - G Kalicy
- The Catholic University of America, Washington, D.C. 20064, USA
| | - M Kamel
- Florida International University, Miami, Florida 33199, USA
| | - C Kourkoumelis
- National and Kapodistrian University of Athens, 15771 Athens, Greece
| | - S Kuleshov
- Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile
| | - I Kuznetsov
- Tomsk State University, 634050 Tomsk, Russia
- Tomsk Polytechnic University, 634050 Tomsk, Russia
| | - I Larin
- University of Massachusetts, Amherst, Massachusetts 01003, USA
| | - D Lawrence
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - D I Lersch
- Florida State University, Tallahassee, Florida 32306, USA
| | - H Li
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - W Li
- College of William and Mary, Williamsburg, Virginia 23185, USA
| | - B Liu
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - K Livingston
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - G J Lolos
- University of Regina, Regina, Saskatchewan, Canada S4S 0A2
| | - V Lyubovitskij
- Tomsk State University, 634050 Tomsk, Russia
- Tomsk Polytechnic University, 634050 Tomsk, Russia
| | - D Mack
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - H Marukyan
- A.I. Alikhanian National Science Laboratory (Yerevan Physics Institute), 0036 Yerevan, Armenia
| | - V Matveev
- National Research Centre Kurchatov Institute, Institute for Theoretical and Experimental Physics, Moscow 117259, Russia
| | - M McCaughan
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - M McCracken
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - W McGinley
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - J McIntyre
- University of Connecticut, Storrs, Connecticut 06269, USA
| | - C A Meyer
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - R Miskimen
- University of Massachusetts, Amherst, Massachusetts 01003, USA
| | - R E Mitchell
- Indiana University, Bloomington, Indiana 47405, USA
| | - F Mokaya
- University of Connecticut, Storrs, Connecticut 06269, USA
| | - F Nerling
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - L Ng
- Florida State University, Tallahassee, Florida 32306, USA
| | - A I Ostrovidov
- Florida State University, Tallahassee, Florida 32306, USA
| | - Z Papandreou
- University of Regina, Regina, Saskatchewan, Canada S4S 0A2
| | - M Patsyuk
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - P Pauli
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - R Pedroni
- North Carolina A&T State University, Greensboro, North Carolina 27411, USA
| | - L Pentchev
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - K J Peters
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - W Phelps
- The George Washington University, Washington, D.C. 20052, USA
| | - E Pooser
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - N Qin
- Northwestern University, Evanston, Illinois 60208, USA
| | - J Reinhold
- Florida International University, Miami, Florida 33199, USA
| | - B G Ritchie
- Arizona State University, Tempe, Arizona 85287, USA
| | - L Robison
- Northwestern University, Evanston, Illinois 60208, USA
| | - D Romanov
- National Research Nuclear University Moscow Engineering Physics Institute, Moscow 115409, Russia
| | - C Romero
- Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile
| | - C Salgado
- Norfolk State University, Norfolk, Virginia 23504, USA
| | - A M Schertz
- College of William and Mary, Williamsburg, Virginia 23185, USA
| | - R A Schumacher
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - J Schwiening
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - K K Seth
- Northwestern University, Evanston, Illinois 60208, USA
| | - X Shen
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - M R Shepherd
- Indiana University, Bloomington, Indiana 47405, USA
| | - E S Smith
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - D I Sober
- The Catholic University of America, Washington, D.C. 20064, USA
| | - A Somov
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - S Somov
- National Research Nuclear University Moscow Engineering Physics Institute, Moscow 115409, Russia
| | - O Soto
- Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile
| | - J R Stevens
- College of William and Mary, Williamsburg, Virginia 23185, USA
| | - I I Strakovsky
- The George Washington University, Washington, D.C. 20052, USA
| | - K Suresh
- University of Regina, Regina, Saskatchewan, Canada S4S 0A2
| | - V Tarasov
- National Research Centre Kurchatov Institute, Institute for Theoretical and Experimental Physics, Moscow 117259, Russia
| | - S Taylor
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - A Teymurazyan
- University of Regina, Regina, Saskatchewan, Canada S4S 0A2
| | - A Thiel
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - G Vasileiadis
- National and Kapodistrian University of Athens, 15771 Athens, Greece
| | - D Werthmüller
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - T Whitlatch
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | | | - M Williams
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - T Xiao
- Northwestern University, Evanston, Illinois 60208, USA
| | - Y Yang
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - J Zarling
- Indiana University, Bloomington, Indiana 47405, USA
| | - Z Zhang
- Wuhan University, Wuhan, Hubei 430072, People's Republic of China
| | - G Zhao
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - Q Zhou
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
| | - X Zhou
- Wuhan University, Wuhan, Hubei 430072, People's Republic of China
| | - B Zihlmann
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
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5
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Albayrak I, Mamyan V, Christy ME, Ahmidouch A, Arrington J, Asaturyan A, Bodek A, Bosted P, Bradford R, Brash E, Bruell A, Butuceanu C, Coleman SJ, Commisso M, Connell SH, Dalton MM, Danagoulian S, Daniel A, Day DB, Dhamija S, Dunne J, Dutta D, Ent R, Gaskell D, Gasparian A, Gran R, Horn T, Huang L, Huber GM, Jayalath C, Johnson M, Jones MK, Kalantarians N, Liyanage A, Keppel CE, Kinney E, Li Y, Malace S, Manly S, Markowitz P, Maxwell J, Mbianda NN, McFarland KS, Meziane M, Meziani ZE, Mills GB, Mkrtchyan H, Mkrtchyan A, Mulholland J, Nelson J, Niculescu G, Niculescu I, Pentchev L, Puckett A, Punjabi V, Qattan IA, Reimer PE, Reinhold J, Rodriguez VM, Rondon-Aramayo O, Sakuda M, Sakumoto WK, Segbefia E, Seva T, Sick I, Slifer K, Smith GR, Steinman J, Solvignon P, Tadevosyan V, Tajima S, Tvaskis V, Vulcan WF, Walton T, Wesselmann FR, Wood SA, Ye Z. Measurements of Nonsinglet Moments of the Nucleon Structure Functions and Comparison to Predictions from Lattice QCD for Q^{2}=4 GeV^{2}. Phys Rev Lett 2019; 123:022501. [PMID: 31386522 DOI: 10.1103/physrevlett.123.022501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 04/10/2019] [Indexed: 06/10/2023]
Abstract
We present extractions of the nucleon nonsinglet moments utilizing new precision data on the deuteron F_{2} structure function at large Bjorken-x determined via the Rosenbluth separation technique at Jefferson Lab Experimental Hall C. These new data are combined with a complementary set of data on the proton previously measured in Hall C at similar kinematics and world datasets on the proton and deuteron at lower x measured at SLAC and CERN. The new Jefferson Lab data provide coverage of the upper third of the x range, crucial for precision determination of the higher moments. In contrast to previous extractions, these moments have been corrected for nuclear effects in the deuteron using a new global fit to the deuteron and proton data. The obtained experimental moments represent an order of magnitude improvement in precision over previous extractions using high x data. Moreover, recent exciting developments in lattice QCD calculations provide a first ever comparison of these new experimental results with calculations of moments carried out at the physical pion mass, as well as a new approach that first calculates the quark distributions directly before determining moments.
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Affiliation(s)
- I Albayrak
- Hampton University, Hampton, Virginia 23668, USA
- Catholic University of America, Washington, DC 20064, USA
| | - V Mamyan
- University of Chicago, Chicago, Illinois 60637, USA
| | - M E Christy
- Hampton University, Hampton, Virginia 23668, USA
| | - A Ahmidouch
- North Carolina A&T State University, Greensboro, North Carolina 27411, USA
| | - J Arrington
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - A Asaturyan
- Yerevan Physics Institute, Yerevan 0036, Armenia
| | - A Bodek
- Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA
| | - P Bosted
- Department of Physics, College of William & Mary, Williamsburg, Virginia 23187, USA
| | - R Bradford
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - E Brash
- Christopher Newport University, Newport News, Virginia 23606, USA
| | - A Bruell
- DFG, German Research Foundation, Bonn 51170, Germany
| | - C Butuceanu
- University of Regina, Regina, Saskatchewan S4S 0A2, Canada
| | - S J Coleman
- Department of Physics, College of William & Mary, Williamsburg, Virginia 23187, USA
| | - M Commisso
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - S H Connell
- University of Johannesburg, Auckland Park 2006, Johannesburg, South Africa
| | - M M Dalton
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - S Danagoulian
- North Carolina A&T State University, Greensboro, North Carolina 27411, USA
| | - A Daniel
- University of Houston, Houston, Texas 77004, USA
| | - D B Day
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - S Dhamija
- Florida International University, Miami, Florida 33199, USA
| | - J Dunne
- Mississippi State University, Mississippi State, Mississippi 39762, USA
| | - D Dutta
- Mississippi State University, Mississippi State, Mississippi 39762, USA
| | - R Ent
- Thomas Jeferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - D Gaskell
- Thomas Jeferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - A Gasparian
- North Carolina A&T State University, Greensboro, North Carolina 27411, USA
| | - R Gran
- Department of Physics, University of Minnesota-Duluth, Duluth, Minnesota 55812, USA
| | - T Horn
- Catholic University of America, Washington, DC 20064, USA
| | - Liting Huang
- Hampton University, Hampton, Virginia 23668, USA
| | - G M Huber
- University of Regina, Regina, Saskatchewan S4S 0A2, Canada
| | - C Jayalath
- Hampton University, Hampton, Virginia 23668, USA
| | - M Johnson
- Argonne National Laboratory, Argonne, Illinois 60439, USA
- Northwestern University, Evanston, Illinois 60208, USA
| | - M K Jones
- Thomas Jeferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - N Kalantarians
- Virginia Union University, Richmond, Virginia 23220, USA
| | - A Liyanage
- Hampton University, Hampton, Virginia 23668, USA
| | - C E Keppel
- Thomas Jeferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - E Kinney
- University of Colorado, Boulder, Colorado 80309, USA
| | - Y Li
- Hampton University, Hampton, Virginia 23668, USA
| | - S Malace
- Duke University, Department of Physics, Box 90305, Durham, North Carolina 27708
| | - S Manly
- Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA
| | - P Markowitz
- Florida International University, Miami, Florida 33199, USA
| | - J Maxwell
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - N N Mbianda
- University of Johannesburg, Auckland Park 2006, Johannesburg, South Africa
| | - K S McFarland
- Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA
| | - M Meziane
- Department of Physics, College of William & Mary, Williamsburg, Virginia 23187, USA
| | - Z E Meziani
- Department of Physics, Temple University, Philadelphia, Pennsylvania 19122, USA
| | - G B Mills
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - H Mkrtchyan
- Yerevan Physics Institute, Yerevan 0036, Armenia
| | - A Mkrtchyan
- Yerevan Physics Institute, Yerevan 0036, Armenia
| | - J Mulholland
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - J Nelson
- Department of Physics, College of William & Mary, Williamsburg, Virginia 23187, USA
| | - G Niculescu
- James Madison University, Harrisonburg, Virginia 22801, USA
| | - I Niculescu
- James Madison University, Harrisonburg, Virginia 22801, USA
| | - L Pentchev
- Department of Physics, College of William & Mary, Williamsburg, Virginia 23187, USA
| | - A Puckett
- University of Connecticut, Storrs, Connecticut 06269, USA
| | - V Punjabi
- Norfolk State University, Norfolk, Virginia 23504, USA
| | - I A Qattan
- Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates
| | - P E Reimer
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - J Reinhold
- Florida International University, Miami, Florida 33199, USA
| | | | | | - M Sakuda
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - W K Sakumoto
- Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA
| | - E Segbefia
- Hampton University, Hampton, Virginia 23668, USA
| | - T Seva
- University of Zagreb, Zagreb 10000, Croatia
| | - I Sick
- University of Basel, CH-4056 Basel, Switzerland
| | - K Slifer
- University of New Hampshire, Durham, New Hampshire 03824, USA
| | - G R Smith
- Thomas Jeferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - J Steinman
- Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA
| | - P Solvignon
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - V Tadevosyan
- Yerevan Physics Institute, Yerevan 0036, Armenia
| | - S Tajima
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - V Tvaskis
- University of Winnipeg, Winnipeg, Manitoba R3B 2E9, Canada
| | - W F Vulcan
- Thomas Jeferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - T Walton
- Hampton University, Hampton, Virginia 23668, USA
| | | | - S A Wood
- Thomas Jeferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - Zhihong Ye
- Hampton University, Hampton, Virginia 23668, USA
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6
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Nakamura SN, Matsumura A, Okayasu Y, Seva T, Rodriguez VM, Baturin P, Yuan L, Acha A, Ahmidouch A, Androic D, Asaturyan A, Asaturyan R, Baker OK, Benmokhtar F, Bosted P, Carlini R, Chen C, Christy M, Cole L, Danagoulian S, Daniel A, Dharmawardane V, Egiyan K, Elaasar M, Ent R, Fenker H, Fujii Y, Furic M, Gan L, Gaskell D, Gasparian A, Gibson EF, Gogami T, Gueye P, Han Y, Hashimoto O, Hiyama E, Honda D, Horn T, Hu B, Hungerford EV, Jayalath C, Jones M, Johnston K, Kalantarians N, Kanda H, Kaneta M, Kato F, Kato S, Kawama D, Keppel C, Lan KJ, Luo W, Mack D, Maeda K, Malace S, Margaryan A, Marikyan G, Markowitz P, Maruta T, Maruyama N, Miyoshi T, Mkrtchyan A, Mkrtchyan H, Nagao S, Navasardyan T, Niculescu G, Niculescu MI, Nomura H, Nonaka K, Ohtani A, Oyamada M, Perez N, Petkovic T, Randeniya S, Reinhold J, Roche J, Sato Y, Segbefia EK, Simicevic N, Smith G, Song Y, Sumihama M, Tadevosyan V, Takahashi T, Tang L, Tsukada K, Tvaskis V, Vulcan W, Wells S, Wood SA, Yan C, Zhamkochyan S. Observation of the (Λ)(7)He hypernucleus by the (e, e'K+) reaction. Phys Rev Lett 2013; 110:012502. [PMID: 23383783 DOI: 10.1103/physrevlett.110.012502] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Indexed: 06/01/2023]
Abstract
An experiment with a newly developed high-resolution kaon spectrometer and a scattered electron spectrometer with a novel configuration was performed in Hall C at Jefferson Lab. The ground state of a neutron-rich hypernucleus, (Λ)(7)He, was observed for the first time with the (e, e'K+) reaction with an energy resolution of ~0.6 MeV. This resolution is the best reported to date for hypernuclear reaction spectroscopy. The (Λ)(7)He binding energy supplies the last missing information of the A = 7, T = 1 hypernuclear isotriplet, providing a new input for the charge symmetry breaking effect of the ΛN potential.
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Affiliation(s)
- S N Nakamura
- Graduate School of Science, Tohoku University, Sendai, Miyagi 980-8578, Japan
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7
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Abrahamyan S, Ahmed Z, Allada K, Anez D, Averett T, Barbieri A, Bartlett K, Beacham J, Bono J, Boyce JR, Brindza P, Camsonne A, Cranmer K, Dalton MM, de Jager CW, Donaghy J, Essig R, Field C, Folts E, Gasparian A, Goeckner-Wald N, Gomez J, Graham M, Hansen JO, Higinbotham DW, Holmstrom T, Huang J, Iqbal S, Jaros J, Jensen E, Kelleher A, Khandaker M, LeRose JJ, Lindgren R, Liyanage N, Long E, Mammei J, Markowitz P, Maruyama T, Maxwell V, Mayilyan S, McDonald J, Michaels R, Moffeit K, Nelyubin V, Odian A, Oriunno M, Partridge R, Paolone M, Piasetzky E, Pomerantz I, Qiang Y, Riordan S, Roblin Y, Sawatzky B, Schuster P, Segal J, Selvy L, Shahinyan A, Subedi R, Sulkosky V, Stepanyan S, Toro N, Walz D, Wojtsekhowski B, Zhang J. Search for a new gauge boson in electron-nucleus fixed-target scattering by the APEX experiment. Phys Rev Lett 2011; 107:191804. [PMID: 22181599 DOI: 10.1103/physrevlett.107.191804] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2011] [Indexed: 05/31/2023]
Abstract
We present a search at the Jefferson Laboratory for new forces mediated by sub-GeV vector bosons with weak coupling α' to electrons. Such a particle A' can be produced in electron-nucleus fixed-target scattering and then decay to an e + e- pair, producing a narrow resonance in the QED trident spectrum. Using APEX test run data, we searched in the mass range 175-250 MeV, found no evidence for an A'→ e+ e- reaction, and set an upper limit of α'/α ~/= 10(-6). Our findings demonstrate that fixed-target searches can explore a new, wide, and important range of masses and couplings for sub-GeV forces.
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Affiliation(s)
- S Abrahamyan
- Yerevan Physics Institute, Yerevan 375036, Armenia
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8
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Larin I, McNulty D, Clinton E, Ambrozewicz P, Lawrence D, Nakagawa I, Prok Y, Teymurazyan A, Ahmidouch A, Asratyan A, Baker K, Benton L, Bernstein AM, Burkert V, Cole P, Collins P, Dale D, Danagoulian S, Davidenko G, Demirchyan R, Deur A, Dolgolenko A, Dzyubenko G, Ent R, Evdokimov A, Feng J, Gabrielyan M, Gan L, Gasparian A, Gevorkyan S, Glamazdin A, Goryachev V, Gyurjyan V, Hardy K, He J, Ito M, Jiang L, Kashy D, Khandaker M, Kingsberry P, Kolarkar A, Konchatnyi M, Korchin A, Korsch W, Kowalski S, Kubantsev M, Kubarovsky V, Li X, Martel P, Matveev V, Mecking B, Milbrath B, Minehart R, Miskimen R, Mochalov V, Mtingwa S, Overby S, Pasyuk E, Payen M, Pedroni R, Ritchie B, Rodrigues TE, Salgado C, Shahinyan A, Sitnikov A, Sober D, Stepanyan S, Stephens W, Underwood J, Vasiliev A, Vishnyakov V, Wood M, Zhou S. New Measurement of the π0 radiative decay width. Phys Rev Lett 2011; 106:162303. [PMID: 21599360 DOI: 10.1103/physrevlett.106.162303] [Citation(s) in RCA: 8] [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: 09/12/2010] [Indexed: 05/30/2023]
Abstract
High precision measurements of the differential cross sections for π0 photoproduction at forward angles for two nuclei, 12C and 208Pb, have been performed for incident photon energies of 4.9-5.5 GeV to extract the π0→γγ decay width. The experiment was done at Jefferson Lab using the Hall B photon tagger and a high-resolution multichannel calorimeter. The π0→γγ decay width was extracted by fitting the measured cross sections using recently updated theoretical models for the process. The resulting value for the decay width is Γ(π0→γγ)=7.82±0.14(stat)±0.17(syst) eV. With the 2.8% total uncertainty, this result is a factor of 2.5 more precise than the current Particle Data Group average of this fundamental quantity, and it is consistent with current theoretical predictions.
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Affiliation(s)
- I Larin
- Alikhanov Institute for Theoretical and Experimental Physics, Moscow, Russia
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9
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Battaglieri M, De Vita R, Szczepaniak AP, Adhikari KP, Aghasyan M, Amaryan MJ, Ambrozewicz P, Anghinolfi M, Asryan G, Avakian H, Bagdasaryan H, Baillie N, Ball JP, Baltzell NA, Batourine V, Bedlinskiy I, Bellis M, Benmouna N, Berman BL, Bibrzycki L, Biselli AS, Bookwalter C, Bouchigny S, Boiarinov S, Bradford R, Branford D, Briscoe WJ, Brooks WK, Bültmann S, Burkert VD, Calarco JR, Careccia SL, Carman DS, Casey L, Chen S, Cheng L, Clinton E, Cole PL, Collins P, Crabb D, Crannell H, Crede V, Cummings JP, Dale D, Daniel A, Dashyan N, De Masi R, De Sanctis E, Degtyarenko PV, Deur A, Dhamija S, Dharmawardane KV, Dickson R, Djalali C, Dodge GE, Donnelly J, Doughty D, Dugger M, Dzyubak OP, Egiyan H, Egiyan KS, El Fassi L, Elouadrhiri L, Eugenio P, Fedotov G, Fersch R, Forest TA, Fradi A, Gabrielyan MY, Gan L, Garçon M, Gasparian A, Gavalian G, Gevorgyan N, Gilfoyle GP, Giovanetti KL, Girod FX, Glamazdin O, Goett J, Goetz JT, Gohn W, Golovatch E, Gordon CIO, Gothe RW, Graham L, Griffioen KA, Guidal M, Guler N, Guo L, Gyurjyan V, Hadjidakis C, Hafidi K, Hakobyan H, Hakobyan RS, Hanretty C, Hardie J, Hassall N, Heddle D, Hersman FW, Hicks K, Hleiqawi I, Holtrop M, Hyde CE, Ilieva Y, Ireland DG, Ishkhanov BS, Isupov EL, Ito MM, Jenkins D, Jo HS, Johnstone JR, Joo K, Juengst HG, Kageya T, Kalantarians N, Keller D, Kellie JD, Khandaker M, Khetarpal P, Kim W, Klein A, Klein FJ, Klimenko AV, Konczykowski P, Kossov M, Krahn Z, Kramer LH, Kubarovsky V, Kuhn J, Kuhn SE, Kuleshov SV, Kuznetsov V, Lachniet J, Laget JM, Langheinrich J, Lawrence D, Lee T, Lesniak L, Li J, Livingston K, Lowry M, Lu HY, Maccormick M, Malace S, Markov N, Mattione P, McCracken ME, McKinnon B, Mecking BA, Melone JJ, Mestayer MD, Meyer CA, Mibe T, Mikhailov K, Mineeva T, Minehart R, Mirazita M, Miskimen R, Mochalov V, Mokeev V, Moreno B, Moriya K, Morrow SA, Moteabbed M, Munevar E, Mutchler GS, Nadel-Turonski P, Nakagawa I, Nasseripour R, Niccolai S, Niculescu G, Niculescu I, Niczyporuk BB, Niroula MR, Niyazov RA, Nozar M, Osipenko M, Ostrovidov AI, Park K, Park S, Pasyuk E, Paris M, Paterson C, Pereira SA, Pierce J, Pivnyuk N, Pocanic D, Pogorelko O, Pozdniakov S, Price JW, Prok Y, Protopopescu D, Raue BA, Riccardi G, Ricco G, Ripani M, Ritchie BG, Rosner G, Rossi P, Sabatié F, Saini MS, Salamanca J, Salgado C, Sandorfi A, Santoro JP, Sapunenko V, Schott D, Schumacher RA, Serov VS, Sharabian YG, Sharov D, Shvedunov NV, Smith ES, Smith LC, Sober DI, Sokhan D, Starostin A, Stavinsky A, Stepanyan S, Stepanyan SS, Stokes BE, Stoler P, Stopani KA, Strakovsky II, Strauch S, Taiuti M, Tedeschi DJ, Teymurazyan A, Tkabladze A, Tkachenko S, Todor L, Tur C, Ungaro M, Vineyard MF, Vlassov AV, Watts DP, Wei X, Weinstein LB, Weygand DP, Williams M, Wolin E, Wood MH, Yegneswaran A, Yurov M, Zana L, Zhang J, Zhao B, Zhao ZW. Measurement of direct f0(980) photoproduction on the proton. Phys Rev Lett 2009; 102:102001. [PMID: 19392104 DOI: 10.1103/physrevlett.102.102001] [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: 11/11/2008] [Indexed: 05/27/2023]
Abstract
We report on the results of the first measurement of exclusive f_{0}(980) meson photoproduction on protons for E_{gamma}=3.0-3.8 GeV and -t=0.4-1.0 GeV2. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility. The resonance was detected via its decay in the pi;{+}pi;{-} channel by performing a partial wave analysis of the reaction gammap-->ppi;{+}pi;{-}. Clear evidence of the f_{0}(980) meson was found in the interference between P and S waves at M_{pi;{+}pi;{-}} approximately 1 GeV. The S-wave differential cross section integrated in the mass range of the f_{0}(980) was found to be a factor of about 50 smaller than the cross section for the rho meson. This is the first time the f_{0}(980) meson has been measured in a photoproduction experiment.
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Affiliation(s)
- M Battaglieri
- Istituto Nazionale di Fisica Nucleare, Sezione di Genova, 16146 Genova, Italy
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10
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Slifer K, Amarian M, Auerbach L, Averett T, Berthot J, Bertin P, Bertozzi B, Black T, Brash E, Brown D, Burtin E, Calarco J, Cates G, Chai Z, Chen JP, Choi S, Chudakov E, Ciofi Degli Atti C, Cisbani E, de Jager CW, Deur A, DiSalvo R, Dieterich S, Djawotho P, Finn M, Fissum K, Fonvieille H, Frullani S, Gao H, Gao J, Garibaldi F, Gasparian A, Gilad S, Gilman R, Glamazdin A, Glashausser C, Glöckle W, Golak J, Goldberg E, Gomez J, Gorbenko V, Hansen JO, Hersman B, Holmes R, Huber GM, Hughes E, Humensky B, Incerti S, Iodice M, Jensen S, Jiang X, Jones C, Jones G, Jones M, Jutier C, Kamada H, Ketikyan A, Kominis I, Korsch W, Kramer K, Kumar K, Kumbartzki G, Kuss M, Lakuriqi E, Laveissiere G, Lerose JJ, Liang M, Liyanage N, Lolos G, Malov S, Marroncle J, McCormick K, McKeown RD, Meziani ZE, Michaels R, Mitchell J, Nogga A, Pace E, Papandreou Z, Pavlin T, Petratos GG, Pripstein D, Prout D, Ransome R, Roblin Y, Rowntree D, Rvachev M, Sabatié F, Saha A, Salmè G, Scopetta S, Skibiński R, Souder P, Saito T, Strauch S, Suleiman R, Takahashi K, Teijiro S, Todor L, Tsubota H, Ueno H, Urciuoli G, Van der Meer R, Vernin P, Voskanian H, Witała H, Wojtsekhowski B, Xiong F, Xu W, Yang JC, Zhang B, Zolnierczuk P. 3He spin-dependent cross sections and sum rules. Phys Rev Lett 2008; 101:022303. [PMID: 18764175 DOI: 10.1103/physrevlett.101.022303] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2008] [Indexed: 05/26/2023]
Abstract
We present a measurement of the spin-dependent cross sections for the 3He over -->(e over -->,e')X reaction in the quasielastic and resonance regions at a four-momentum transfer 0.1< or =Q2< or =0.9 GeV2. The spin-structure functions have been extracted and used to evaluate the nuclear Burkhardt-Cottingham and extended Gerasimov-Drell-Hearn sum rules for the first time. The data are also compared to an impulse approximation calculation and an exact three-body Faddeev calculation in the quasielastic region.
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Affiliation(s)
- K Slifer
- Temple University, Philadelphia, Pennsylvania 19122, USA
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11
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Tvaskis V, Christy ME, Arrington J, Asaturyan R, Baker OK, Blok HP, Bosted P, Boswell M, Bruell A, Cochran A, Cole L, Crowder J, Dunne J, Ent R, Fenker HC, Filippone BW, Garrow K, Gasparian A, Gomez J, Jackson HE, Keppel CE, Kinney E, Lapikás L, Liang Y, Lorenzon W, Lung A, Mack DJ, Martin JW, McIlhany K, Meekins D, Milner RG, Mitchell JH, Mkrtchyan H, Moreland B, Nazaryan V, Niculescu I, Opper A, Piercey RB, Potterveld DH, Rose B, Sato Y, Seo W, Smith G, Spurlock K, van der Steenhoven G, Stepanyan S, Tadevosian V, Uzzle A, Vulcan WF, Wood SA, Zihlmann B, Ziskin V. Longitudinal-transverse separations of deep-inelastic structure functions at low Q2 for hydrogen and deuterium. Phys Rev Lett 2007; 98:142301. [PMID: 17501267 DOI: 10.1103/physrevlett.98.142301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2006] [Indexed: 05/15/2023]
Abstract
We report on a study of the longitudinal to transverse cross section ratio, R=sigmaL/sigmaT, at low values of x and Q2, as determined from inclusive inelastic electron-hydrogen and electron-deuterium scattering data from Jefferson Laboratory Hall C spanning the four-momentum transfer range 0.06<Q2<2.8 GeV2. Even at the lowest values of Q2, R remains nearly constant and does not disappear with decreasing Q2, as might be expected. We find a nearly identical behavior for hydrogen and deuterium.
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Affiliation(s)
- V Tvaskis
- Vrije Universiteit, 1081 HV Amsterdam, The Netherlands
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12
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Kubarovsky V, Battaglieri M, De Vita R, Goett J, Guo L, Mutchler GS, Stoler P, Weygand DP, Ambrozewicz P, Anghinolfi M, Asryan G, Avakian H, Bagdasaryan H, Baillie N, Ball JP, Baltzell NA, Batourine V, Bedlinskiy I, Bellis M, Benmouna N, Berman BL, Biselli AS, Bouchigny S, Boiarinov S, Bradford R, Branford D, Briscoe WJ, Brooks WK, Bültmann S, Burkert VD, Butuceanu C, Calarco JR, Careccia SL, Carman DS, Chen S, Clinton E, Cole PL, Collins P, Coltharp P, Crabb D, Crannell H, Crede V, Cummings JP, De Masi R, Dale D, De Sanctis E, Degtyarenko PV, Deur A, Dharmawardane KV, Djalali C, Dodge GE, Donnelly J, Doughty D, Dugger M, Dzyubak OP, Egiyan H, Egiyan KS, Elouadrhiri L, Eugenio P, Fedotov G, Funsten H, Gabrielyan MY, Gan L, Garçon M, Gasparian A, Gavalian G, Gilfoyle GP, Giovanetti KL, Girod FX, Glamazdin O, Goetz JT, Golovach E, Gonenc A, Gordon CIO, Gothe RW, Griffioen KA, Guidal M, Guler N, Gyurjyan V, Hadjidakis C, Hafidi K, Hakobyan RS, Hardie J, Hersman FW, Hicks K, Hleiqawi I, Holtrop M, Hyde-Wright CE, Ilieva Y, Ireland DG, Ishkhanov BS, Isupov EL, Ito MM, Jenkins D, Jo HS, Joo K, Juengst HG, Kellie JD, Khandaker M, Kim W, Klein A, Klein FJ, Klimenko AV, Kossov M, Kramer LH, Kuhn J, Kuhn SE, Kuleshov SV, Lachniet J, Laget JM, Langheinrich J, Lawrence D, Lee T, Li J, Livingston K, Lu H, MacCormick M, Markov N, McKinnon B, Mecking BA, Melone JJ, Mestayer MD, Meyer CA, Mibe T, Mikhailov K, Minehart R, Mirazita M, Miskimen R, Mochalov V, Mokeev V, Morand L, Morrow SA, Moteabbed M, Nadel-Turonski P, Nakagawa I, Nasseripour R, Niccolai S, Niculescu G, Niculescu I, Niczyporuk BB, Niroula MR, Niyazov RA, Nozar M, Osipenko M, Ostrovidov AI, Park K, Pasyuk E, Paterson C, Pierce J, Pivnyuk N, Pocanic D, Pogorelko O, Pozdniakov S, Price JW, Prok Y, Protopopescu D, Raue BA, Riccardi G, Ricco G, Ripani M, Ritchie BG, Ronchetti F, Rosner G, Rossi P, Sabatié F, Salgado C, Santoro JP, Sapunenko V, Schumacher RA, Serov VS, Sharabian YG, Shvedunov NV, Smith ES, Smith LC, Sober DI, Stavinsky A, Stepanyan SS, Stepanyan S, Stokes BE, Strakovsky II, Strauch S, Taiuti M, Tedeschi DJ, Teymurazyan A, Thoma U, Tkabladze A, Tkachenko S, Todor L, Tur C, Ungaro M, Vineyard MF, Vlassov AV, Weinstein LB, Williams M, Wolin E, Wood MH, Yegneswaran A, Zana L, Zhang J, Zhao B. Search for Theta++ pentaquarks in the exclusive reaction gammap-->K+K-p. Phys Rev Lett 2006; 97:102001. [PMID: 17025804 DOI: 10.1103/physrevlett.97.102001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2006] [Indexed: 05/12/2023]
Abstract
The reaction gammap --> pK+K- was studied at Jefferson Lab with photon energies from 1.8 to 3.8 GeV using a tagged photon beam. The goal was to search for a Theta++ pentaquark, a narrow, doubly charged baryon state having strangeness S=+1 and isospin I=1, in the pK+ invariant mass spectrum. No statistically significant evidence of a Theta++ was found. Upper limits on the total and differential cross section for the reaction gammap --> K-Theta++ were obtained in the mass range from 1.5 to 2.0 GeV/c2, with an upper limit for a narrow resonance with a mass M(Theta++) = 1.54 GeV/c2 of about 0.15 nb, 95% C.L.. This result places a stringent upper limit on the Theta++ width Gamma(Theta++) <0.1 MeV/c2.
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Affiliation(s)
- V Kubarovsky
- Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA
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13
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McKinnon B, Hicks K, Baltzell NA, Carman DS, Mestayer MD, Mibe T, Mirazita M, Niccolai S, Rossi P, Stepanyan S, Tedeschi DJ, Ambrozewicz P, Anghinolfi M, Asryan G, Avakian H, Bagdasaryan H, Baillie N, Ball JP, Batourine V, Battaglieri M, Bedlinskiy I, Bellis M, Benmouna N, Berman BL, Biselli AS, Bouchigny S, Boiarinov S, Bradford R, Branford D, Briscoe WJ, Brooks WK, Bültmann S, Burkert VD, Butuceanu C, Calarco JR, Careccia SL, Chen S, Cole PL, Collins P, Coltharp P, Crabb D, Crede V, Dale D, De Masi R, DeVita R, De Sanctis E, Degtyarenko PV, Deur A, Djalali C, Dodge GE, Donnelly J, Doughty D, Dugger M, Dzyubak OP, Egiyan H, Egiyan KS, Elouadrhiri L, Eugenio P, Fedotov G, Feldman G, Funsten H, Gabrielyan M, Gan L, Garçon M, Gasparian A, Gavalian G, Gilfoyle GP, Giovanetti KL, Girod FX, Goetz JT, Gonenc A, Gothe RW, Griffioen KA, Guidal M, Guler N, Guo L, Gyurjyan V, Hakobyan RS, Hersman FW, Hleiqawi I, Holtrop M, Hyde-Wright CE, Ilieva Y, Ireland DG, Ishkhanov BS, Ito MM, Jenkins D, Jo HS, Joo K, Juengst HG, Kellie JD, Khandaker M, Kim W, Klein A, Klein FJ, Kossov M, Kramer LH, Kubarovsky V, Kuhn J, Kuhn SE, Kuleshov SV, Lachniet J, Langheinrich J, Lawrence D, Livingston K, Lu H, MacCormick M, Mecking BA, Meyer CA, Mikhailov K, Miskimen R, Mokeev V, Morrow SA, Moteabbed M, Mutchler GS, Nakagawa I, Nadel-Turonski P, Nasseripour R, Niculescu G, Niculescu I, Niczyporuk BB, Niroula MR, Niyazov RA, Nozar M, Osipenko M, Ostrovidov AI, Park K, Pasyuk E, Paterson C, Pierce J, Pivnyuk N, Pogorelko O, Pozdniakov S, Price JW, Prok Y, Protopopescu D, Raue BA, Ricco G, Ripani M, Ritchie BG, Ronchetti F, Rosner G, Sabatié F, Salgado C, Santoro JP, Sapunenko V, Schumacher RA, Serov VS, Sharabian YG, Smith ES, Smith LC, Sober DI, Stavinsky A, Stepanyan SS, Stokes BE, Stoler P, Strakovsky II, Strauch S, Taiuti M, Teymurazyan A, Thoma U, Tkabladze A, Tkachenko S, Tur C, Ungaro M, Vineyard MF, Vlassov AV, Weinstein LB, Weygand DP, Williams M, Wolin E, Wood MH, Yegneswaran A, Zana L, Zhang J, Zhao B, Zhao Z. Search for the Theta+ pentaquark in the reaction gammad --> pK-K+n. Phys Rev Lett 2006; 96:212001. [PMID: 16803230 DOI: 10.1103/physrevlett.96.212001] [Citation(s) in RCA: 4] [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: 03/14/2006] [Indexed: 05/10/2023]
Abstract
A search for the Theta+ in the reaction gammad --> pK-K+n was completed using the CLAS detector at Jefferson Lab. A study of the same reaction, published earlier, reported the observation of a narrow Theta+ resonance. The present experiment, with more than 30 times the integrated luminosity of our earlier measurement, does not show any evidence for a narrow pentaquark resonance. The angle-integrated upper limit on Theta+ production in the mass range of 1.52-1.56 GeV/c2 for the gammad --> pK-Theta+ reaction is 0.3 nb (95% C.L.). This upper limit depends on assumptions made for the mass and angular distribution of Theta+ production. Using Lambda(1520) production as an empirical measure of rescattering in the deuteron, the cross section upper limit for the elementary gamman --> K-Theta+ reaction is estimated to be a factor of 10 higher, i.e., approximately 3 nb (95% C.L.).
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Affiliation(s)
- B McKinnon
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
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14
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Battaglieri M, De Vita R, Kubarovsky V, Guo L, Mutchler GS, Stoler P, Weygand DP, Ambrozewicz P, Anghinolfi M, Asryan G, Avakian H, Bagdasaryan H, Baillie N, Ball JP, Baltzell NA, Batourine V, Bedlinskiy I, Bellis M, Benmouna N, Berman BL, Biselli AS, Bouchigny S, Boiarinov S, Bradford R, Branford D, Briscoe WJ, Brooks WK, Bültmann S, Burkert VD, Butuceanu C, Calarco JR, Careccia SL, Carman DS, Chen S, Clinton E, Cole PL, Coltharp P, Crabb D, Crannell H, Cummings JP, Dale D, De Sanctis E, Degtyarenko PV, Deur A, Dharmawardane KV, Djalali C, Dodge GE, Donnelly J, Doughty D, Dugger M, Dzyubak OP, Egiyan H, Egiyan KS, Elouadrhiri L, Eugenio P, Fedotov G, Funsten H, Gabrielyan MY, Gan L, Garçon M, Gasparian A, Gavalian G, Gilfoyle GP, Giovanetti KL, Girod FX, Glamazdin O, Goett J, Goetz JT, Golovach E, Gonenc A, Gordon CIO, Gothe RW, Griffioen KA, Guidal M, Guler N, Gyurjyan V, Hadjidakis C, Hakobyan RS, Hardie J, Hersman FW, Hicks K, Hleiqawi I, Holtrop M, Hyde-Wright CE, Ilieva Y, Ireland DG, Ishkhanov BS, Ito MM, Jenkins D, Jo HS, Joo K, Juengst HG, Kellie JD, Khandaker M, Kim W, Klein A, Klein FJ, Klimenko AV, Kossov M, Kramer LH, Kuhn J, Kuhn SE, Kuleshov SV, Lachniet J, Laget JM, Langheinrich J, Lawrence D, Lee T, Li J, Livingston K, McKinnon B, Mecking BA, Melone JJ, Mestayer MD, Meyer CA, Mibe T, Mikhailov K, Minehart R, Mirazita M, Miskimen R, Mochalov V, Mokeev V, Morand L, Morrow SA, Nadel-Turonski P, Nakagawa I, Nasseripour R, Niccolai S, Niculescu G, Niculescu I, Niczyporuk BB, Niyazov RA, Nozar M, Osipenko M, Ostrovidov AI, Park K, Pasyuk E, Paterson C, Pierce J, Pivnyuk N, Pocanic D, Pogorelko O, Pozdniakov S, Price JW, Prok Y, Protopopescu D, Raue BA, Riccardi G, Ricco G, Ripani M, Ritchie BG, Ronchetti F, Rosner G, Rossi P, Sabatié F, Salgado C, Santoro JP, Sapunenko V, Schumacher RA, Serov VS, Sharabian YG, Smith ES, Smith LC, Sober DI, Stavinsky A, Stepanyan SS, Stepanyan S, Stokes BE, Strakovsky II, Strauch S, Taiuti M, Tedeschi DJ, Teymurazyan A, Thoma U, Tkabladze A, Tkachenko S, Todor L, Tur C, Ungaro M, Vineyard MF, Vlassov AV, Weinstein LB, Williams M, Wolin E, Wood MH, Yegneswaran A, Zana L, Zhang J, Zhao B. Search for Theta+ (1540) Pentaquark in High-Statistics Measurement of gammap-->K0K+n at CLAS. Phys Rev Lett 2006; 96:042001. [PMID: 16486808 DOI: 10.1103/physrevlett.96.042001] [Citation(s) in RCA: 2] [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: 10/22/2005] [Indexed: 05/06/2023]
Abstract
The exclusive reaction gammap-->K0K+n was studied in the photon energy range between 1.6 and 3.8 GeV searching for evidence of the exotic baryon Theta+ (1540)-->nK+. The decay to nK+requires the assignment of strangeness S=+1 to any observed resonance. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility corresponding to an integrated luminosity of 70 pb-1. No evidence for the Theta+ pentaquark was found. Upper limits were set on the production cross section as function of center-of-mass angle and nK+ mass. The 95% C.L. upper limit on the total cross section for a narrow resonance at 1540 MeV was found to be 0.8 nb.
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Affiliation(s)
- M Battaglieri
- Istituto Nazionale di Fisica Nucleare, Sezione di Genova, and Dipartimento di Fisica, Universitá di Genova, 16146 Genova, Italy
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Yemelyanov A, Gasparian A, Lindholm P, Dang L, Pierce JW, Kisseljov F, Karseladze A, Budunova I. Effects of IKK inhibitor PS1145 on NF-κB function, proliferation, apoptosis and invasion activity in prostate carcinoma cells. Oncogene 2005; 25:387-98. [PMID: 16170348 DOI: 10.1038/sj.onc.1209066] [Citation(s) in RCA: 99] [Impact Index Per Article: 5.2] [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: 11/09/2022]
Abstract
A key antiapoptotic transcription factor, nuclear factor kappa-B (NF-kappaB), is known to be critically important for tumor cell growth, angiogenesis and development of metastatic lesions. We and others showed previously that NF-kappaB transcription factor was constitutively activated in androgen-independent prostate carcinoma (PC) cell lines due to the upregulated activity of inhibitor of NF-kappaB kinases (IKK). In this work, using luciferase assay, electrophoretic mobility shift assay and Northern blot analysis of expression of endogenous kappaB-responsive genes, we demonstrate that a novel highly specific small-molecule IKK inhibitor, PS1145, efficiently inhibited both basal and induced NF-kappaB activity in PC cells. We found that PS1145 induced caspase 3/7-dependent apoptosis in PC cells and significantly sensitized PC cells to apoptosis induced by tumor necrosis factor alpha. We also showed that PS1145 inhibited PC cell proliferation. Effects of PS1145 on proliferation and apoptosis correlated with inhibition of interleukin (IL)-6, cyclin D1, D2, inhibitor of apoptosis (IAP)-1 and IAP-2 gene expression and decreased IL-6 protein level. In addition, we found that incubation with PS1145 inhibited the invasion activity of highly invasive PC3-S cells in invasion chamber assay in a dose-dependent manner. Overall, this study provides the framework for development of a novel therapeutic approach targeting NF-kappaB transcription factor to treat advanced PC.
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Affiliation(s)
- A Yemelyanov
- Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
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17
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Rohe D, Armstrong CS, Asaturyan R, Baker OK, Bueltmann S, Carasco C, Day D, Ent R, Fenker HC, Garrow K, Gasparian A, Gueye P, Hauger M, Honegger A, Jourdan J, Keppel CE, Kubon G, Lindgren R, Lung A, Mack DJ, Mitchell JH, Mkrtchyan H, Mocelj D, Normand K, Petitjean T, Rondon O, Segbefia E, Sick I, Stepanyan S, Tang L, Tiefenbacher F, Vulcan WF, Warren G, Wood SA, Yuan L, Zeier M, Zhu H, Zihlmann B. Correlated strength in the nuclear spectral function. Phys Rev Lett 2004; 93:182501. [PMID: 15525158 DOI: 10.1103/physrevlett.93.182501] [Citation(s) in RCA: 4] [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: 05/18/2004] [Indexed: 05/24/2023]
Abstract
We have carried out an (e,e'p) experiment at high momentum transfer and in parallel kinematics to measure the strength of the nuclear spectral function S(k,E) at high nucleon momenta k and large removal energies E. This strength is related to the presence of short-range and tensor correlations, and was known hitherto only indirectly and with considerable uncertainty from the lack of strength in the independent-particle region. This experiment locates by direct measurement the correlated strength predicted by theory.
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Affiliation(s)
- D Rohe
- University of Basel, CH-4056 Basel, Switzerland
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18
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Amarian M, Auerbach L, Averett T, Berthot J, Bertin P, Bertozzi W, Black T, Brash E, Brown D, Burtin E, Calarco J, Cates G, Chai Z, Chen JP, Choi S, Chudakov E, Cisbani E, de Jager CW, Deur A, DiSalvo R, Dieterich S, Djawotho P, Finn JM, Fissum K, Fonvieille H, Frullani S, Gao H, Gao J, Garibaldi F, Gasparian A, Gilad S, Gilman R, Glamazdin A, Glashausser C, Goldberg E, Gomez J, Gorbenko V, Hansen JO, Hersman B, Holmes R, Huber GM, Hughes E, Humensky B, Incerti S, Iodice M, Jensen S, Jiang X, Jones C, Jones G, Jones M, Jutier C, Ketikyan A, Kominis I, Korsch W, Kramer K, Kumar K, Kumbartzki G, Kuss M, Lakuriqi E, Laveissiere G, Lerose J, Liang M, Liyanage N, Lolos G, Malov S, Marroncle J, McCormick K, McKeown R, Meziani ZE, Michaels R, Mitchell J, Papandreou Z, Pavlin T, Petratos GG, Pripstein D, Prout D, Ransome R, Roblin Y, Rowntree D, Rvachev M, Sabatie F, Saha A, Slifer K, Souder P, Saito T, Strauch S, Suleiman R, Takahashi K, Teijiro S, Todor L, Tsubota H, Ueno H, Urciuoli G, Van der Meer R, Vernin P, Voskanian H, Wojtsekhowski B, Xiong F, Xu W, Yang JC, Zhang B, Zołnierczuk PA. Measurement of the generalized forward spin polarizabilities of the neutron. Phys Rev Lett 2004; 93:152301. [PMID: 15524867 DOI: 10.1103/physrevlett.93.152301] [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: 06/02/2004] [Indexed: 05/24/2023]
Abstract
The generalized forward spin polarizabilities gamma(0) and delta(LT) of the neutron have been extracted for the first time in a Q2 range from 0.1 to 0.9 GeV2. Since gamma(0) is sensitive to nucleon resonances and delta(LT) is insensitive to the Delta resonance, it is expected that the pair of forward spin polarizabilities should provide benchmark tests of the current understanding of the chiral dynamics of QCD. The new results on delta(LT) show significant disagreement with chiral perturbation theory calculations, while the data for gamma(0) at low Q2 are in good agreement with a next-to-leading-order relativistic baryon chiral perturbation theory calculation. The data show good agreement with the phenomenological MAID model.
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Affiliation(s)
- M Amarian
- Yerevan Physics Institute, Yerevan 375036, Armenia
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19
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Laveissière G, Todor L, Degrande N, Jaminion S, Jutier C, Di Salvo R, Van Hoorebeke L, Alexa LC, Anderson BD, Aniol KA, Arundell K, Audit G, Auerbach L, Baker FT, Baylac M, Berthot J, Bertin PY, Bertozzi W, Bimbot L, Boeglin WU, Brash EJ, Breton V, Breuer H, Burtin E, Calarco JR, Cardman LS, Cavata C, Chang CC, Chen JP, Chudakov E, Cisbani E, Dale DS, de Jager CW, De Leo R, Deur A, d'Hose N, Dodge GE, Domingo JJ, Elouadrhiri L, Epstein MB, Ewell LA, Finn JM, Fissum KG, Fonvieille H, Fournier G, Frois B, Frullani S, Furget C, Gao H, Gao J, Garibaldi F, Gasparian A, Gilad S, Gilman R, Glamazdin A, Glashausser C, Gomez J, Gorbenko V, Grenier P, Guichon PAM, Hansen JO, Holmes R, Holtrop M, Howell C, Huber GM, Hyde-Wright CE, Incerti S, Iodice M, Jardillier J, Jones MK, Kahl W, Kato S, Katramatou AT, Kelly JJ, Kerhoas S, Ketikyan A, Khayat M, Kino K, Kox S, Kramer LH, Kumar KS, Kumbartzki G, Kuss M, Leone A, LeRose JJ, Liang M, Lindgren RA, Liyanage N, Lolos GJ, Lourie RW, Madey R, Maeda K, Malov S, Manley DM, Marchand C, Marchand D, Margaziotis DJ, Markowitz P, Marroncle J, Martino J, McCormick K, McIntyre J, Mehrabyan S, Merchez F, Meziani ZE, Michaels R, Miller GW, Mougey JY, Nanda SK, Neyret D, Offermann EAJM, Papandreou Z, Pasquini B, Perdrisat CF, Perrino R, Petratos GG, Platchkov S, Pomatsalyuk R, Prout DL, Punjabi VA, Pussieux T, Quémenér G, Ransome RD, Ravel O, Real JS, Renard F, Roblin Y, Rowntree D, Rutledge G, Rutt PM, Saha A, Saito T, Sarty AJ, Serdarevic A, Smith T, Smirnov G, Soldi K, Sorokin P, Souder PA, Suleiman R, Templon JA, Terasawa T, Tieulent R, Tomasi-Gustaffson E, Tsubota H, Ueno H, Ulmer PE, Urciuoli GM, Vanderhaeghen M, Van De Vyver R, Van der Meer RLJ, Vernin P, Vlahovic B, Voskanyan H, Voutier E, Watson JW, Weinstein LB, Wijesooriya K, Wilson R, Wojtsekhowski BB, Zainea DG, Zhang WM, Zhao J, Zhou ZL. Measurement of the generalized polarizabilities of the proton in virtual Compton scattering at Q2=0.92 and 1.76 GeV2. Phys Rev Lett 2004; 93:122001. [PMID: 15447252 DOI: 10.1103/physrevlett.93.122001] [Citation(s) in RCA: 3] [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: 12/23/2003] [Indexed: 05/24/2023]
Abstract
We report a virtual Compton scattering study of the proton at low c.m. energies. We have determined the structure functions P(LL)-P(TT)/epsilon and P(LT), and the electric and magnetic generalized polarizabilities (GPs) alpha(E)(Q2) and beta(M)(Q2) at momentum transfer Q(2)=0.92 and 1.76 GeV2. The electric GP shows a strong falloff with Q2, and its global behavior does not follow a simple dipole form. The magnetic GP shows a rise and then a falloff; this can be interpreted as the dominance of a long-distance diamagnetic pion cloud at low Q2, compensated at higher Q2 by a paramagnetic contribution from piN intermediate states.
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Affiliation(s)
- G Laveissière
- Université Blaise Pascal/IN2P3, F-63177 Aubière, France
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20
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Warren G, Wesselmann F, Zhu H, McKee P, Savvinov N, Zeier M, Aghalaryan A, Ahmidouch A, Arenhövel H, Asaturyan R, Ben-Dayan I, Bloch F, Boeglin W, Boillat B, Breuer H, Brower J, Carasco C, Carl M, Carlini R, Cha J, Chant N, Christy E, Cole L, Coman L, Coman M, Crabb D, Danagoulian S, Day D, Duek K, Dunne J, Elaasar M, Ent R, Farrell J, Fatemi R, Fawcett D, Fenker H, Forest T, Garrow K, Gasparian A, Goussev I, Gueye P, Harvey M, Hauger M, Herrera R, Hu B, Jaegle I, Jones M, Jourdan J, Keith C, Kelly J, Keppel C, Khandaker M, Klein A, Klimenko A, Kramer L, Krusche B, Kuhn S, Liang Y, Lichtenstadt J, Lindgren R, Liu J, Lung A, Mack D, Maclachlan G, Markowitz P, McNulty D, Meekins D, Mitchell J, Mkrtchyan H, Nasseripour R, Niculescu I, Normand K, Norum B, Opper A, Piasetzky E, Pierce J, Pitt M, Prok Y, Raue B, Reinhold J, Roche J, Rohe D, Rondon O, Sacker D, Sawatzky B, Seely M, Sick I, Simicevic N, Smith C, Smith G, Steinacher M, Stepanyan S, Stout J, Tadevosyan V, Tajima S, Tang L, Testa G, Trojer R, Vlahovic B, Vulcan B, Wang K, Wells S, Woehrle H, Wood S, Yan C, Yanay Y, Yuan L, Yun J, Zihlmann B. Measurement of the electric form factor of the neutron at Q2=0.5 and 1.0 GeV2/c2. Phys Rev Lett 2004; 92:042301. [PMID: 14995367 DOI: 10.1103/physrevlett.92.042301] [Citation(s) in RCA: 11] [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: 08/01/2003] [Indexed: 05/24/2023]
Abstract
The electric form factor of the neutron was determined from measurements of the d-->(e-->,e'n)p reaction for quasielastic kinematics. Polarized electrons were scattered off a polarized deuterated ammonia (15ND3) target in which the deuteron polarization was perpendicular to the momentum transfer. The scattered electrons were detected in a magnetic spectrometer in coincidence with neutrons in a large solid angle detector. We find G(n)(E)=0.0526+/-0.0033(stat)+/-0.0026(sys) and 0.0454+/-0.0054+/-0.0037 at Q(2)=0.5 and 1.0 (GeV/c)(2), respectively.
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Affiliation(s)
- G Warren
- Universität Basel, CH-4056 Basel, Switzerland
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21
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Amarian M, Auerbach L, Averett T, Berthot J, Bertin P, Bertozzi B, Black T, Brash E, Brown D, Burtin E, Calarco J, Cates G, Chai Z, Chen JP, Choi S, Chudakov E, Cisbani E, De Jager CW, Deur A, DiSalvo R, Dieterich S, Djawotho P, Finn M, Fissum K, Fonvieille H, Frullani S, Gao H, Gao J, Garibaldi F, Gasparian A, Gilad S, Gilman R, Glamazdin A, Glashausser C, Goldberg E, Gomez J, Gorbenko V, Hansen JO, Hersman B, Holmes R, Huber GM, Hughes E, Humensky B, Incerti S, Iodice M, Jensen S, Jiang X, Jones C, Jones G, Jones M, Jutier C, Ketikyan A, Kominis I, Korsch W, Kramer K, Kumar K, Kumbartzki G, Kuss M, Lakuriqi E, Laveissiere G, Lerose J, Liang M, Liyanage N, Lolos G, Malov S, Marroncle J, McCormick K, McKeown R, Meziani ZE, Michaels R, Mitchell J, Papandreou Z, Pavlin T, Petratos GG, Pripstein D, Prout D, Ransome R, Roblin Y, Rowntree D, Rvachev M, Sabatie F, Saha A, Slifer K, Souder P, Saito T, Strauch S, Suleiman R, Takahashi K, Teijiro S, Todor L, Tsubota H, Ueno H, Urciuoli G, Van Der Meer R, Vernin P, Voskanian H, Wojtsekhowski B, Xiong F, Xu W, Yang JC, Zhang B, Zolnierczuk P. Q2 evolution of the neutron spin structure moments using a 3He target. Phys Rev Lett 2004; 92:022301. [PMID: 14753931 DOI: 10.1103/physrevlett.92.022301] [Citation(s) in RCA: 2] [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: 06/23/2003] [Indexed: 05/24/2023]
Abstract
We have measured the spin structure functions g(1) and g(2) of 3He in a double-spin experiment by inclusively scattering polarized electrons at energies ranging from 0.862 to 5.058 GeV off a polarized 3He target at a 15.5 degrees scattering angle. Excitation energies covered the resonance and the onset of the deep inelastic regions. We have determined for the first time the Q2 evolution of Gamma(1)(Q2)= integral (1)(0)g(1)(x,Q2)dx, Gamma(2)(Q2)= integral (1)(0)g(2)(x,Q2)dx, and d(2)(Q2)= integral (1)(0)x(2)[2g(1)(x,Q2)+3g(2)(x,Q2)]dx for the neutron in the range 0.1< or =Q2< or =0.9 GeV2 with good precision. Gamma(1)(Q2) displays a smooth variation from high to low Q2. The Burkhardt-Cottingham sum rule holds within uncertainties and d(2) is nonzero over the measured range.
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Affiliation(s)
- M Amarian
- Yerevan Physics Institute, Yerevan 375036, Armenia
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22
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Madey R, Semenov AY, Taylor S, Plaster B, Aghalaryan A, Crouse E, MacLachlan G, Tajima S, Tireman W, Yan C, Ahmidouch A, Anderson BD, Arenhövel H, Asaturyan R, Baker OK, Baldwin AR, Barkhuff D, Breuer H, Carlini R, Christy E, Churchwell S, Cole L, Danagoulian S, Day D, Eden T, Elaasar M, Ent R, Farkhondeh M, Fenker H, Finn JM, Gan L, Garrow K, Gasparian A, Gueye P, Howell CR, Hu B, Jones MK, Kelly JJ, Keppel C, Khandaker M, Kim WY, Kowalski S, Lai A, Lung A, Mack D, Manley DM, Markowitz P, Mitchell J, Mkrtchyan H, Opper AK, Perdrisat C, Punjabi V, Raue B, Reichelt T, Reinhold J, Roche J, Sato Y, Savvinov N, Semenova IA, Seo W, Simicevic N, Smith G, Stepanyan S, Tadevosyan V, Tang L, Ulmer PE, Vulcan W, Watson JW, Wells S, Wesselmann F, Wood S, Yan C, Yang S, Yuan L, Zhang WM, Zhu H, Zhu X. Measurements of GnE/GnM from the 2H(e-->,en-->)1H Reaction to Q2=1.45 (GeV/c)2. Phys Rev Lett 2003; 91:122002. [PMID: 14525355 DOI: 10.1103/physrevlett.91.122002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2003] [Indexed: 05/24/2023]
Abstract
We report new measurements of the ratio of the electric form factor to the magnetic form factor of the neutron, G(n)(E)/G(n)(M), obtained via recoil polarimetry from the quasielastic 2H(e-->,e(')n-->)1H reaction at Q2 values of 0.45, 1.13, and 1.45 (GeV/c)(2) with relative statistical uncertainties of 7.6% and 8.4% at the two higher Q2 points, which points have never been achieved in polarization measurements.
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Affiliation(s)
- R Madey
- Kent State University, Kent, Ohio 44242, USA
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Strauch S, Dieterich S, Aniol KA, Annand JRM, Baker OK, Bertozzi W, Boswell M, Brash EJ, Chai Z, Chen JP, Christy ME, Chudakov E, Cochran A, De Leo R, Ent R, Epstein MB, Finn JM, Fissum KG, Forest TA, Frullani S, Garibaldi F, Gasparian A, Gayou O, Gilad S, Gilman R, Glashausser C, Gomez J, Gorbenko V, Gueye PLJ, Hansen JO, Higinbotham DW, Hu B, Hyde-Wright CE, Ireland DG, Jackson C, de Jager CW, Jiang X, Jones C, Jones MK, Kellie JD, Kelly JJ, Keppel CE, Kumbartzki G, Kuss M, LeRose JJ, Livingston K, Liyanage N, Malov S, Margaziotis DJ, Meekins D, Michaels R, Mitchell JH, Nanda SK, Nappa J, Perdrisat CF, Punjabi VA, Ransome RD, Roché R, Rosner G, Rvachev M, Sabatie F, Saha A, Sarty A, Udias JM, Ulmer PE, Urciuoli GM, van den Brand JFJ, Vignote JR, Watts DP, Weinstein LB, Wijesooriya K, Wojtsekhowski B. Polarization transfer in the 4He(e-->,e'p-->)3H reaction up to Q2=2.6 (GeV/c)2. Phys Rev Lett 2003; 91:052301. [PMID: 12906589 DOI: 10.1103/physrevlett.91.052301] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2002] [Revised: 05/05/2003] [Indexed: 05/24/2023]
Abstract
We have measured the proton recoil polarization in the 4He(e-->,e(')p-->)4H reaction at Q(2)=0.5, 1.0, 1.6, and 2.6 (GeV/c)(2). The measured ratio of polarization transfer coefficients differs from a fully relativistic calculation, favoring the inclusion of a medium modification of the proton form factors predicted by a quark-meson coupling model. In addition, the measured induced polarizations agree reasonably well with the fully relativistic calculation indicating that the treatment of final-state interactions is under control.
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Affiliation(s)
- S Strauch
- Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA
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24
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Miyoshi T, Sarsour M, Yuan L, Zhu X, Ahmidouch A, Ambrozewicz P, Androic D, Angelescu T, Asaturyan R, Avery S, Baker OK, Bertovic I, Breuer H, Carlini R, Cha J, Chrien R, Christy M, Cole L, Danagoulian S, Dehnhard D, Elaasar M, Empl A, Ent R, Fenker H, Fujii Y, Furic M, Gan L, Garrow K, Gasparian A, Gueye P, Harvey M, Hashimoto O, Hinton W, Hu B, Hungerford E, Jackson C, Johnston K, Juengst H, Keppel C, Lan K, Liang Y, Likhachev VP, Liu JH, Mack D, Margaryan A, Markowitz P, Martoff J, Mkrtchyan H, Nakamura SN, Petkovic T, Reinhold J, Roche J, Sato Y, Sawafta R, Simicevic N, Smith G, Stepanyan S, Tadevosyan V, Takahashi T, Tanida K, Tang L, Ukai M, Uzzle A, Vulcan W, Wells S, Wood S, Xu G, Yamaguchi H, Yan C. High resolution spectroscopy of the 12Lambda B hypernucleus produced by the (e,e'K+) reaction. Phys Rev Lett 2003; 90:232502. [PMID: 12857252 DOI: 10.1103/physrevlett.90.232502] [Citation(s) in RCA: 3] [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: 10/29/2002] [Indexed: 05/24/2023]
Abstract
High-energy, cw electron beams at new accelerator facilities allow electromagnetic production and precision study of hypernuclear structure, and we report here on the first experiment demonstrating the potential of the (e,e'K+) reaction for hypernuclear spectroscopy. This experiment is also the first to take advantage of the enhanced virtual photon flux available when electrons are scattered at approximately zero degrees. The observed energy resolution was found to be approximately 900 keV for the (12)(Lambda)B spectrum, and is substantially better than any previous hypernuclear experiment using magnetic spectrometers. The positions of the major excitations are found to be in agreement with a theoretical prediction and with a previous binding energy measurement, but additional structure is also observed in the core excited region, underlining the future promise of this technique.
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Affiliation(s)
- T Miyoshi
- Tohoku University, Sendai 980-8578, Japan
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25
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Amarian M, Auerbach L, Averett T, Berthot J, Bertin P, Bertozzi W, Black T, Brash E, Brown D, Burtin E, Calarco JR, Cates GD, Chai Z, Chen JP, Choi S, Chudakov E, Cisbani E, De Jager CW, Deur A, DiSalvo R, Dieterich S, Djawotho P, Finn M, Fissum K, Fonvieille H, Frullani S, Gao H, Gao J, Garibaldi F, Gasparian A, Gilad S, Gilman R, Glamazdin A, Glashausser C, Goldberg E, Gomez J, Gorbenko V, Hansen JO, Hersman FW, Holmes R, Huber GM, Hughes EW, Humensky TB, Incerti S, Iodice M, Jensen S, Jiang X, Jones C, Jones GM, Jones M, Jutier C, Ketikyan A, Kominis I, Korsch W, Kramer K, Kumar KS, Kumbartzki G, Kuss M, Lakuriqi E, Laveissiere G, Lerose J, Liang M, Liyanage N, Lolos G, Malov S, Marroncle J, McCormick K, McKeown R, Meziani ZE, Michaels R, Mitchell J, Papandreou Z, Pavlin T, Petratos GG, Pripstein D, Prout D, Ransome R, Roblin Y, Rowntree D, Rvachev M, Sabatie F, Saha A, Slifer K, Souder PA, Saito T, Strauch S, Suleiman R, Takahashi K, Teijiro S, Todor L, Tsubota H, Ueno H, Urciuoli G, Van Der Meer R, Vernin P, Voskanian H, Wojtsekhowski B, Xiong F, Xu W, Yang JC, Zhang B, Zolnierczuk P. Q2 evolution of the generalized Gerasimov-Drell-Hearn integral for the neutron using a 3He target. Phys Rev Lett 2002; 89:242301. [PMID: 12484938 DOI: 10.1103/physrevlett.89.242301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2002] [Indexed: 05/24/2023]
Abstract
We present data on the inclusive scattering of polarized electrons from a polarized 3He target at energies from 0.862 to 5.06 GeV, obtained at a scattering angle of 15.5 degrees. Our data include measurements from the quasielastic peak, through the nucleon resonance region, and beyond, and were used to determine the virtual photon cross-section difference sigma(1/2)-sigma(3/2). We extract the extended Gerasimov-Drell-Hearn integral for the neutron in the range of four-momentum transfer squared Q2 of 0.1-0.9 GeV2.
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Affiliation(s)
- M Amarian
- Istituto Nazionale di Fiscica Nucleare, Sezione Sanità, 00161 Roma, Italy
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26
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Gaskell D, Ahmidouch A, Ambrozewicz P, Anklin H, Arrington J, Assamagan K, Avery S, Bailey K, Baker OK, Beedoe S, Beise B, Breuer H, Brown DS, Carlini R, Cha J, Chant N, Cowley A, Danagoulian S, De Schepper D, Dunne J, Dutta D, Ent R, Gan L, Gasparian A, Geesaman DF, Gilman R, Glashausser C, Gueye P, Harvey M, Hashimoto O, Hinton W, Hofman G, Jackson C, Jackson HE, Keppel C, Kinney E, Koltenuk D, Kyle G, Lung A, Mack D, McKee D, Mitchell J, Mkrtchyan H, Mueller B, Niculescu G, Niculescu I, O'Neill TG, Papavassiliou V, Potterveld D, Reinhold J, Roos P, Sawafta R, Segel R, Stepanyan S, Tadevosyan V, Takahashi T, Tang L, Terburg B, Van Westrum D, Volmer J, Welch TP, Wood S, Yuan L, Zeidman B, Zihlmann B. Longitudinal electroproduction of charged pions from (1)H, (2)H, and (3)He. Phys Rev Lett 2001; 87:202301. [PMID: 11690468 DOI: 10.1103/physrevlett.87.202301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2001] [Indexed: 05/23/2023]
Abstract
Separated longitudinal and transverse cross sections for charged pion electroproduction from (1)H, (2)H, and (3)He were measured at Q(2) = 0.4 (GeV/c)(2) for two values of the invariant mass, W = 1.15 GeV and W = 1.60 GeV, in a search for a mass dependence which would signal the effect of nuclear pions. This is the first such study that includes recoil momenta significantly above the Fermi surface. The longitudinal cross section, if dominated by the pion-pole process, should be sensitive to nuclear pion currents. Comparisons of the longitudinal cross section target ratios to a quasifree calculation reveal a significant suppression in (3)He at W = 1.60 GeV. The W = 1.15 GeV results are consistent with simple estimates of the effect of nuclear pion currents, but are also consistent with pure quasifree production.
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Affiliation(s)
- D Gaskell
- Oregon State University, Corvallis, Oregon 97331, USA
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27
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Schulte EC, Ahmidouch A, Armstrong CS, Arrington J, Asaturyan R, Avery S, Baker OK, Beck DH, Blok HP, Bochna CW, Boeglin W, Bosted PY, Bouwhuis M, Breuer H, Brown DS, Bruell A, Cadman RV, Carlini R, Chant NS, Cochran A, Cole L, Danagoulian S, Day DB, Dunne JA, Dutta D, Ent R, Fenker HC, Fox B, Gan L, Gao H, Garrow K, Gaskell D, Gasparian A, Geesaman DF, Gilman R, Glashausser C, Gueye P, Harvey M, Holt RJ, Jackson HE, Jiang X, Keppel CE, Kinney ER, Liang Y, Lorenzon W, Lung AF, Mack DJ, Markowitz PE, Martin J, McIlhany K, McKee D, Meekins DG, Miller MA, Milner RG, Mitchell JH, Mkrtchyan H, Mueller BA, Nathan AM, Niculescu G, Niculescu I, O'Neill TG, Papavassiliou V, Pate SF, Piercey RB, Potterveld DH, Ransome RD, Reinhold J, Rollinde E, Roos P, Saha A, Sarty AJ, Sawafta R, Segbefia E, Shin T, Stepanyan S, Strauch S, Sutter MF, Tadevosyan V, Tang L, Tieulent R, Uzzle A, Vulcan WF, Wood SA, Xiong F, Yuan L, Zeier M, Zihlmann B, Ziskin V. Measurement of the high energy two-body deuteron photodisintegration differential cross section. Phys Rev Lett 2001; 87:102302. [PMID: 11531475 DOI: 10.1103/physrevlett.87.102302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2001] [Indexed: 05/23/2023]
Abstract
The first measurements of the d(gamma,p)n differential cross section at forward angles and photon energies above 4 GeV were performed at the Thomas Jefferson National Accelerator Facility (JLab). The results indicate evidence of an angular dependent scaling threshold. Results at straight theta(cm) = 37 degrees are consistent with the constituent counting rules for E(gamma) greater, similar 4 GeV, while those at 70 degrees are consistent with the constituent counting rules for E(gamma) greater, similar 1.5 GeV.
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Affiliation(s)
- E C Schulte
- University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
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28
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Liyanage N, Anderson BD, Aniol KA, Auerbach L, Baker FT, Berthot J, Bertozzi W, Bertin PY, Bimbot L, Boeglin WU, Brash EJ, Breton V, Breuer H, Burtin E, Calarco JR, Cardman L, Cates GD, Cavata C, Chang CC, Chen JP, Cisbani E, Dale DS, De Leo R, Deur A, Diederich B, Djawotho P, Domingo J, Doyle B, Ducret JE, Epstein MB, Ewell LA, Finn JM, Fissum KG, Fonvieille H, Frois B, Frullani S, Gao J, Garibaldi F, Gasparian A, Gilad S, Gilman R, Glamazdin A, Glashausser C, Gomez J, Gorbenko V, Gorringe T, Hersman FW, Holmes R, Holtrop M, d'Hose N, Howell C, Huber GM, Hyde-Wright CE, Iodice M, de Jager CW, Jaminion S, Jones MK, Joo K, Jutier C, Kahl W, Kato S, Kelly JJ, Kerhoas S, Khandaker M, Khayat M, Kino K, Korsch W, Kramer L, Kumar KS, Kumbartzki G, Laveissière G, Leone A, LeRose JJ, Levchuk L, Liang M, Lindgren RA, Lolos GJ, Lourie RW, Madey R, Maeda K, Malov S, Manley DM, Margaziotis DJ, Markowitz P, Martino J, McCarthy JS, McCormick K, McIntyre J, van der Meer RL, Meziani ZE, Michaels R, Mougey J, Nanda S, Neyret D, Offermann EA, Papandreou Z, Perdrisat CF, Perrino R, Petratos GG, Platchkov S, Pomatsalyuk R, Prout DL, Punjabi VA, Pussieux T, Quéméner G, Ransome RD, Ravel O, Roblin Y, Roche R, Rowntree D, Rutledge GA, Rutt PM, Saha A, Saito T, Sarty AJ, Serdarevic-Offermann A, Smith TP, Soldi A, Sorokin P, Souder P, Suleiman R, Templon JA, Terasawa T, Todor L, Tsubota H, Ueno H, Ulmer PE, Urciuoli GM, Vernin P, van Verst S, Vlahovic B, Voskanyan H, Watson JW, Weinstein LB, Wijesooriya K, Wilson R, Wojtsekhowski B, Zainea DG, Zeps V, Zhao J, Zhou ZL. Dynamics of the 16O(e, e'p) reaction at high missing energies. Phys Rev Lett 2001; 86:5670-5674. [PMID: 11415329 DOI: 10.1103/physrevlett.86.5670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2000] [Indexed: 05/23/2023]
Abstract
We measured the cross section and response functions for the quasielastic 16O(e,e'p) reaction for missing energies 25< or =E(m)< or =120 MeV at missing momenta P(m)< or =340 MeV/c. For 25<E(m)<50 MeV and P(m) approximately 60 MeV/c, the reaction is dominated by a single 1s(1/2) proton knockout. At larger P(m), the single-particle aspects are increasingly masked by more complicated processes. Calculations which include pion exchange currents, isobar currents, and short-range correlations account for the shape and the transversity, but for only half of the magnitude of the measured cross section.
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Affiliation(s)
- N Liyanage
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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29
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Chizhikov V, Chikina S, Gasparian A, Chuchalin A, Zborovskaya I, Tatosyan A. Cancer-associated molecular alterations in bronchial epithelium of former Chernobyl cleanup workers in comparison with smokers and nonsmokers without ionizing radiation exposure. Eur J Cancer 2001. [DOI: 10.1016/s0959-8049(01)81050-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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30
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Chizhikov V, Zborovskaya I, Laktionov K, Delektorskaya V, Polotskii B, Tatosyan A, Gasparian A. Two consistently deleted regions within chromosome 1p32-pter in human non-small cell lung cancer. Mol Carcinog 2001; 30:151-8. [PMID: 11301475 DOI: 10.1002/mc.1023] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [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: 11/12/2022]
Abstract
Allelic losses at 1p32-pter have been reported as frequent events in human non-small cell lung cancer (NSCLC). To further characterize the region of deletions, we studied loss of heterozygosity on a panel of 102 microdissected NSCLC samples with 20 polymorphic markers spanning 1p32-pter. Two shortest regions of the overlap of the deletions (SROs) were found: SRO 2a (D1S417--D1S57) and SRO 2b (D1S450--D1S243). Allelic losses at either region correlated independently with advanced stage of disease and with postoperative metastasis and relapse (P < 0.05), suggesting that crucial genes in these regions are involved in NSCLC progression. Mol. Carcinog. 30:151--158, 2001.
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Affiliation(s)
- V Chizhikov
- Oncogene Regulation Laboratory, NN Blokhin Cancer Research Center, Moscow, Russia
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31
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Zborovskaya I, Gasparian A, Karseladze A, Elcheva I, Trofimova E, Driouch K, Trassard M, Tatosyan A, Lidereau R. Somatic genetic alterations (LOH) in benign, borderline and invasive ovarian tumours: intratumoral molecular heterogeneity. Int J Cancer 1999; 82:822-6. [PMID: 10446448 DOI: 10.1002/(sici)1097-0215(19990909)82:6<822::aid-ijc9>3.0.co;2-i] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [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: 11/09/2022]
Abstract
Loss of heterozygosity (LOH) affects a number of chromosome regions in ovarian cancer, pointing to the possible involvement of tumour-suppressor genes in ovarian tumorigenesis. We performed comparative analysis of allelic loss at 6 frequently affected chromosome regions in a panel of 53 benign, borderline and malignant ovarian tumours. Precursor lesions could provide evidence that an accumulation of genetic events is required for normal ovarian epithelium to generate malignant tumours. LOH on chromosome 1p was relatively common in benign, borderline and malignant tumours, while at 11p and 7q it was observed not only in invasive but also in borderline tumours. Moreover, 17q and 18q were affected mainly in advanced malignant tumours and revealed a high frequency of clonal intratumoral heterogeneity. We encountered different spectra of genetic alterations in primary tumours and their metastasis, which may be the results of intratumoral heterogeneity leading to dissemination in only some sub-clones.
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MESH Headings
- Chromosome Mapping
- Chromosomes, Human, Pair 1
- Chromosomes, Human, Pair 11
- Chromosomes, Human, Pair 17
- Chromosomes, Human, Pair 18
- Chromosomes, Human, Pair 7
- Female
- Genetic Markers
- Humans
- Loss of Heterozygosity
- Neoplasm Invasiveness
- Neoplasm Metastasis
- Neoplasm Staging
- Ovarian Neoplasms/genetics
- Ovarian Neoplasms/pathology
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Affiliation(s)
- I Zborovskaya
- Laboratory of Oncogene Regulation, Cancer Research Centre, Moscow, Russia
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32
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Zborovskaya I, Gasparian A, Kitaeva M, Polotzky B, Tupitzin N, Machaladze Z, Gerasimov S, Shtutman M, Jakubovskaya M, Davidov M, Tatosyan A. Simultaneous detection of genetic and immunological markers in non-small cell lung cancer: prediction of metastatic potential of tumor. Clin Exp Metastasis 1996; 14:490-500. [PMID: 8970579 DOI: 10.1007/bf00115109] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [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: 02/03/2023]
Abstract
The restriction fragment length polymorphism of c-Ha-ras-1 and L-myc genes and expression of cell surface effector molecules were studied to determine their potential utility as markers for assessing risk of metastasis in 84 lung cancer patients. We performed a comparative study of primary lung carcinomas, metastases, adjacent tissues and blood samples in a group of patients with lung cancer of different histological types, grade of differentiation and presence of regional and distant metastasis. No differences in the frequency of c-Ha-ras-1 rare alleles were found between lung cancer patients and unaffected controls. The detection of common a4-allele seems to be associated with metastasis and low differentiation of lung carcinomas. S-allele of L-myc was observed in 82.6% of patients with metastatic lesions. Homozygosity of L-allele patients was not evidence for distant metastasis and only 17.4% of these patients have metastatic lesions of the lymph nodes. The expression of HLA class I and receptor of transferrin (TrRec) were tested immunohistochemically in the same patients. In the group of squamous cell carcinomas with regional metastases the expression of HLA class I antigens was decreased [7/21 (33.3%) positive staining tumors versus 13/20 (65.0%) in the group without metastases]. The opposite situation was observed for TrRec. The data of restriction fragment length polymorphism of oncogenes and expression of two cell surface effector molecules, identified in the same patients, were combined. The registration of more than one poor marker, tested in individuals with squamous cell carcinoma, closely correlated with dissemination and advanced stage of the disease. Nearly 90% (20/22) of patients with well and moderately differentiated tumor revealed metastatic lesions versus 6.6% (1/15) of patients with manifestation of a single poor marker. Finally, proposals could be made for the development of a risk group that incorporates both clinical and molecular biology features in the prediction of metastasis.
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MESH Headings
- Adenocarcinoma/genetics
- Adenocarcinoma/immunology
- Adenocarcinoma/secondary
- Alleles
- Antigens, CD/analysis
- Antigens, Differentiation, B-Lymphocyte/analysis
- Biomarkers, Tumor/analysis
- Carcinoma, Squamous Cell/genetics
- Carcinoma, Squamous Cell/immunology
- Carcinoma, Squamous Cell/secondary
- Female
- Genes, myc/genetics
- Genes, ras/genetics
- Genetic Markers
- Genotype
- Histocompatibility Antigens Class I/analysis
- Humans
- Lung Neoplasms/genetics
- Lung Neoplasms/immunology
- Male
- Polymorphism, Restriction Fragment Length
- Prognosis
- Receptors, Transferrin
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Affiliation(s)
- I Zborovskaya
- Blokhin's Cancer Research Center of Medical Science Academy, Moscow, Russia
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