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Adam J, Adamczyk L, Adams JR, Adkins JK, Agakishiev G, Aggarwal MM, Ahammed Z, Ajitanand NN, Alekseev I, Anderson DM, Aoyama R, Aparin A, Arkhipkin D, Aschenauer EC, Ashraf MU, Atetalla F, Attri A, Averichev GS, Bai X, Bairathi V, Barish K, Bassill AJ, Behera A, Bellwied R, Bhasin A, Bhati AK, Bielcik J, Bielcikova J, Bland LC, Bordyuzhin IG, Brandenburg JD, Brandin AV, Brown D, Bryslawskyj J, Bunzarov I, Butterworth J, Caines H, Calderón de la Barca Sánchez M, Campbell JM, Cebra D, Chakaberia I, Chaloupka P, Chang FH, Chang Z, Chankova-Bunzarova N, Chatterjee A, Chattopadhyay S, Chen JH, Chen X, Chen X, Cheng J, Cherney M, Christie W, Contin G, Crawford HJ, Das S, Dedovich TG, Deppner IM, Derevschikov AA, Didenko L, Dilks C, Dong X, Drachenberg JL, Dunlop JC, Efimov LG, Elsey N, Engelage J, Eppley G, Esha R, Esumi S, Evdokimov O, Ewigleben J, Eyser O, Fatemi R, Fazio S, Federic P, Federicova P, Fedorisin J, Filip P, Finch E, Fisyak Y, Flores CE, Fulek L, Gagliardi CA, Galatyuk T, Geurts F, Gibson A, Grosnick D, Gunarathne DS, Guo Y, Gupta A, Guryn W, Hamad AI, Hamed A, Harlenderova A, Harris JW, He L, Heppelmann S, Heppelmann S, Herrmann N, Hirsch A, Holub L, Horvat S, Huang X, Huang B, Huang SL, Huang HZ, Huang T, Humanic TJ, Huo P, Igo G, Jacobs WW, Jentsch A, Jia J, Jiang K, Jowzaee S, Judd EG, Kabana S, Kalinkin D, Kang K, Kapukchyan D, Kauder K, Ke HW, Keane D, Kechechyan A, Kikoła DP, Kim C, Kinghorn TA, Kisel I, Kisiel A, Klein SR, Kochenda L, Kosarzewski LK, Kraishan AF, Kramarik L, Krauth L, Kravtsov P, Krueger K, Kulathunga N, Kumar S, Kumar L, Kvapil J, Kwasizur JH, Lacey R, Landgraf JM, Lauret J, Lebedev A, Lednicky R, Lee JH, Li X, Li C, Li W, Li Y, Liang Y, Lidrych J, Lin T, Lipiec A, Lisa MA, Liu F, Liu P, Liu H, Liu Y, Ljubicic T, Llope WJ, Lomnitz M, Longacre RS, Luo X, Luo S, Ma GL, Ma YG, Ma L, Ma R, Magdy N, Majka R, Mallick D, Margetis S, Markert C, Matis HS, Matonoha O, Mayes D, Mazer JA, Meehan K, Mei JC, Minaev NG, Mioduszewski S, Mishra D, Mohanty B, Mondal MM, Mooney I, Morozov DA, Nasim M, Negrete JD, Nelson JM, Nemes DB, Nie M, Nigmatkulov G, Niida T, Nogach LV, Nonaka T, Nurushev SB, Odyniec G, Ogawa A, Oh K, Oh S, Okorokov VA, Olvitt D, Page BS, Pak R, Panebratsev Y, Pawlik B, Pei H, Perkins C, Pluta J, Porter J, Posik M, Pruthi NK, Przybycien M, Putschke J, Quintero A, Radhakrishnan SK, Ramachandran S, Ray RL, Reed R, Ritter HG, Roberts JB, Rogachevskiy OV, Romero JL, Ruan L, Rusnak J, Rusnakova O, Sahoo NR, Sahu PK, Salur S, Sandweiss J, Schambach J, Schmah AM, Schmidke WB, Schmitz N, Schweid BR, Seck F, Seger J, Sergeeva M, Seto R, Seyboth P, Shah N, Shahaliev E, Shanmuganathan PV, Shao M, Shen WQ, Shen F, Shi SS, Shou QY, Sichtermann EP, Siejka S, Sikora R, Simko M, Singha S, Smirnov N, Smirnov D, Solyst W, Sorensen P, Spinka HM, Srivastava B, Stanislaus TDS, Stewart DJ, Strikhanov M, Stringfellow B, Suaide AAP, Sugiura T, Sumbera M, Summa B, Sun Y, Sun X, Sun XM, Surrow B, Svirida DN, Szymanski P, Tang Z, Tang AH, Taranenko A, Tarnowsky T, Thomas JH, Timmins AR, Tlusty D, Todoroki T, Tokarev M, Tomkiel CA, Trentalange S, Tribble RE, Tribedy P, Tripathy SK, Tsai OD, Tu B, Ullrich T, Underwood DG, Upsal I, Van Buren G, Vanek J, Vasiliev AN, Vassiliev I, Videbæk F, Vokal S, Voloshin SA, Vossen A, Wang G, Wang Y, Wang F, Wang Y, Webb JC, Wen L, Westfall GD, Wieman H, Wissink SW, Witt R, Wu Y, Xiao ZG, Xie G, Xie W, Xu QH, Xu Z, Xu J, Xu YF, Xu N, Yang S, Yang C, Yang Q, Yang Y, Ye Z, Ye Z, Yi L, Yip K, Yoo IK, Yu N, Zbroszczyk H, Zha W, Zhang Z, Zhang L, Zhang Y, Zhang XP, Zhang J, Zhang S, Zhang S, Zhang J, Zhao J, Zhong C, Zhou C, Zhou L, Zhu Z, Zhu X, Zyzak M. Low-p_{T} e^{+}e^{-} Pair Production in Au+Au Collisions at sqrt[s_{NN}]=200 GeV and U+U Collisions at sqrt[s_{NN}]=193 GeV at STAR. Phys Rev Lett 2018; 121:132301. [PMID: 30312102 DOI: 10.1103/physrevlett.121.132301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 08/30/2018] [Indexed: 06/08/2023]
Abstract
We report first measurements of e^{+}e^{-} pair production in the mass region 0.4<M_{ee}<2.6 GeV/c^{2} at low transverse momentum (p_{T}<0.15 GeV/c) in noncentral Au+Au collisions at sqrt[s_{NN}]=200 GeV and U+U collisions at sqrt[s_{NN}]=193 GeV. Significant enhancement factors, expressed as ratios of data over known hadronic contributions, are observed in the 40%-80% centrality of these collisions. The excess yields peak distinctly at low p_{T} with a width (sqrt[⟨p_{T}^{2}⟩]) between 40 and 60 MeV/c. The absolute cross section of the excess depends weakly on centrality, while those from a theoretical model calculation incorporating an in-medium broadened ρ spectral function and radiation from a quark gluon plasma or hadronic cocktail contributions increase dramatically with an increasing number of participant nucleons. Model calculations of photon-photon interactions generated by the initial projectile and target nuclei describe the observed excess yields but fail to reproduce the p_{T}^{2} distributions.
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Affiliation(s)
- J Adam
- Creighton University, Omaha, Nebraska 68178
| | - L Adamczyk
- AGH University of Science and Technology, FPACS, Cracow 30-059, Poland
| | - J R Adams
- Ohio State University, Columbus, Ohio 43210
| | - J K Adkins
- University of Kentucky, Lexington, Kentucky 40506-0055
| | - G Agakishiev
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | | | - Z Ahammed
- Variable Energy Cyclotron Centre, Kolkata 700064, India
| | - N N Ajitanand
- State University of New York, Stony Brook, New York 11794
| | - I Alekseev
- Alikhanov Institute for Theoretical and Experimental Physics, Moscow 117218, Russia
- National Research Nuclear University MEPhI, Moscow 115409, Russia
| | - D M Anderson
- Texas A&M University, College Station, Texas 77843
| | - R Aoyama
- University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - A Aparin
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | - D Arkhipkin
- Brookhaven National Laboratory, Upton, New York 11973
| | | | | | | | - A Attri
- Panjab University, Chandigarh 160014, India
| | - G S Averichev
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | - X Bai
- Central China Normal University, Wuhan, Hubei 430079
| | - V Bairathi
- National Institute of Science Education and Research, HBNI, Jatni 752050, India
| | - K Barish
- University of California, Riverside, California 92521
| | - A J Bassill
- University of California, Riverside, California 92521
| | - A Behera
- State University of New York, Stony Brook, New York 11794
| | - R Bellwied
- University of Houston, Houston, Texas 77204
| | - A Bhasin
- University of Jammu, Jammu 180001, India
| | - A K Bhati
- Panjab University, Chandigarh 160014, India
| | - J Bielcik
- Czech Technical University in Prague, FNSPE, Prague 115 19, Czech Republic
| | - J Bielcikova
- Nuclear Physics Institute AS CR, Prague 250 68, Czech Republic
| | - L C Bland
- Brookhaven National Laboratory, Upton, New York 11973
| | - I G Bordyuzhin
- Alikhanov Institute for Theoretical and Experimental Physics, Moscow 117218, Russia
| | | | - A V Brandin
- National Research Nuclear University MEPhI, Moscow 115409, Russia
| | - D Brown
- Lehigh University, Bethlehem, Pennsylvania 18015
| | - J Bryslawskyj
- University of California, Riverside, California 92521
| | - I Bunzarov
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | | | - H Caines
- Yale University, New Haven, Connecticut 06520
| | | | | | - D Cebra
- University of California, Davis, California 95616
| | - I Chakaberia
- Brookhaven National Laboratory, Upton, New York 11973
- Kent State University, Kent, Ohio 44242
- Shandong University, Jinan, Shandong 250100
| | - P Chaloupka
- Czech Technical University in Prague, FNSPE, Prague 115 19, Czech Republic
| | - F-H Chang
- National Cheng Kung University, Tainan 70101
| | - Z Chang
- Brookhaven National Laboratory, Upton, New York 11973
| | | | - A Chatterjee
- Variable Energy Cyclotron Centre, Kolkata 700064, India
| | | | - J H Chen
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800
| | - X Chen
- University of Science and Technology of China, Hefei, Anhui 230026
| | - X Chen
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000
| | - J Cheng
- Tsinghua University, Beijing 100084
| | - M Cherney
- Creighton University, Omaha, Nebraska 68178
| | - W Christie
- Brookhaven National Laboratory, Upton, New York 11973
| | - G Contin
- Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - H J Crawford
- University of California, Berkeley, California 94720
| | - S Das
- Central China Normal University, Wuhan, Hubei 430079
| | - T G Dedovich
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | - I M Deppner
- University of Heidelberg, Heidelberg 69120, Germany
| | | | - L Didenko
- Brookhaven National Laboratory, Upton, New York 11973
| | - C Dilks
- Pennsylvania State University, University Park, Pennsylvania 16802
| | - X Dong
- Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | | | - J C Dunlop
- Brookhaven National Laboratory, Upton, New York 11973
| | - L G Efimov
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | - N Elsey
- Wayne State University, Detroit, Michigan 48201
| | - J Engelage
- University of California, Berkeley, California 94720
| | - G Eppley
- Rice University, Houston, Texas 77251
| | - R Esha
- University of California, Los Angeles, California 90095
| | - S Esumi
- University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - O Evdokimov
- University of Illinois at Chicago, Chicago, Illinois 60607
| | - J Ewigleben
- Lehigh University, Bethlehem, Pennsylvania 18015
| | - O Eyser
- Brookhaven National Laboratory, Upton, New York 11973
| | - R Fatemi
- University of Kentucky, Lexington, Kentucky 40506-0055
| | - S Fazio
- Brookhaven National Laboratory, Upton, New York 11973
| | - P Federic
- Nuclear Physics Institute AS CR, Prague 250 68, Czech Republic
| | - P Federicova
- Czech Technical University in Prague, FNSPE, Prague 115 19, Czech Republic
| | - J Fedorisin
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | - P Filip
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | - E Finch
- Southern Connecticut State University, New Haven, Connecticut 06515
| | - Y Fisyak
- Brookhaven National Laboratory, Upton, New York 11973
| | - C E Flores
- University of California, Davis, California 95616
| | - L Fulek
- AGH University of Science and Technology, FPACS, Cracow 30-059, Poland
| | | | - T Galatyuk
- Technische Universitat Darmstadt, Darmstadt 64289, Germany
| | - F Geurts
- Rice University, Houston, Texas 77251
| | - A Gibson
- Valparaiso University, Valparaiso, Indiana 46383
| | - D Grosnick
- Valparaiso University, Valparaiso, Indiana 46383
| | | | - Y Guo
- Kent State University, Kent, Ohio 44242
| | - A Gupta
- University of Jammu, Jammu 180001, India
| | - W Guryn
- Brookhaven National Laboratory, Upton, New York 11973
| | - A I Hamad
- Kent State University, Kent, Ohio 44242
| | - A Hamed
- Texas A&M University, College Station, Texas 77843
| | - A Harlenderova
- Czech Technical University in Prague, FNSPE, Prague 115 19, Czech Republic
| | - J W Harris
- Yale University, New Haven, Connecticut 06520
| | - L He
- Purdue University, West Lafayette, Indiana 47907
| | - S Heppelmann
- Pennsylvania State University, University Park, Pennsylvania 16802
| | - S Heppelmann
- University of California, Davis, California 95616
| | - N Herrmann
- University of Heidelberg, Heidelberg 69120, Germany
| | - A Hirsch
- Purdue University, West Lafayette, Indiana 47907
| | - L Holub
- Czech Technical University in Prague, FNSPE, Prague 115 19, Czech Republic
| | - S Horvat
- Yale University, New Haven, Connecticut 06520
| | - X Huang
- Tsinghua University, Beijing 100084
| | - B Huang
- University of Illinois at Chicago, Chicago, Illinois 60607
| | - S L Huang
- State University of New York, Stony Brook, New York 11794
| | - H Z Huang
- University of California, Los Angeles, California 90095
| | - T Huang
- National Cheng Kung University, Tainan 70101
| | | | - P Huo
- State University of New York, Stony Brook, New York 11794
| | - G Igo
- University of California, Los Angeles, California 90095
| | - W W Jacobs
- Indiana University, Bloomington, Indiana 47408
| | - A Jentsch
- University of Texas, Austin, Texas 78712
| | - J Jia
- Brookhaven National Laboratory, Upton, New York 11973
- State University of New York, Stony Brook, New York 11794
| | - K Jiang
- University of Science and Technology of China, Hefei, Anhui 230026
| | - S Jowzaee
- Wayne State University, Detroit, Michigan 48201
| | - E G Judd
- University of California, Berkeley, California 94720
| | - S Kabana
- Kent State University, Kent, Ohio 44242
| | - D Kalinkin
- Indiana University, Bloomington, Indiana 47408
| | - K Kang
- Tsinghua University, Beijing 100084
| | - D Kapukchyan
- University of California, Riverside, California 92521
| | - K Kauder
- Wayne State University, Detroit, Michigan 48201
| | - H W Ke
- Brookhaven National Laboratory, Upton, New York 11973
| | - D Keane
- Kent State University, Kent, Ohio 44242
| | - A Kechechyan
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | - D P Kikoła
- Warsaw University of Technology, Warsaw 00-661, Poland
| | - C Kim
- University of California, Riverside, California 92521
| | - T A Kinghorn
- University of California, Davis, California 95616
| | - I Kisel
- Frankfurt Institute for Advanced Studies FIAS, Frankfurt 60438, Germany
| | - A Kisiel
- Warsaw University of Technology, Warsaw 00-661, Poland
| | - S R Klein
- Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - L Kochenda
- National Research Nuclear University MEPhI, Moscow 115409, Russia
| | | | - A F Kraishan
- Temple University, Philadelphia, Pennsylvania 19122
| | - L Kramarik
- Czech Technical University in Prague, FNSPE, Prague 115 19, Czech Republic
| | - L Krauth
- University of California, Riverside, California 92521
| | - P Kravtsov
- National Research Nuclear University MEPhI, Moscow 115409, Russia
| | - K Krueger
- Argonne National Laboratory, Argonne, Illinois 60439
| | | | - S Kumar
- Panjab University, Chandigarh 160014, India
| | - L Kumar
- Panjab University, Chandigarh 160014, India
| | - J Kvapil
- Czech Technical University in Prague, FNSPE, Prague 115 19, Czech Republic
| | | | - R Lacey
- State University of New York, Stony Brook, New York 11794
| | - J M Landgraf
- Brookhaven National Laboratory, Upton, New York 11973
| | - J Lauret
- Brookhaven National Laboratory, Upton, New York 11973
| | - A Lebedev
- Brookhaven National Laboratory, Upton, New York 11973
| | - R Lednicky
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | - J H Lee
- Brookhaven National Laboratory, Upton, New York 11973
| | - X Li
- University of Science and Technology of China, Hefei, Anhui 230026
| | - C Li
- University of Science and Technology of China, Hefei, Anhui 230026
| | - W Li
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800
| | - Y Li
- Tsinghua University, Beijing 100084
| | - Y Liang
- Kent State University, Kent, Ohio 44242
| | - J Lidrych
- Czech Technical University in Prague, FNSPE, Prague 115 19, Czech Republic
| | - T Lin
- Texas A&M University, College Station, Texas 77843
| | - A Lipiec
- Warsaw University of Technology, Warsaw 00-661, Poland
| | - M A Lisa
- Ohio State University, Columbus, Ohio 43210
| | - F Liu
- Central China Normal University, Wuhan, Hubei 430079
| | - P Liu
- State University of New York, Stony Brook, New York 11794
| | - H Liu
- Indiana University, Bloomington, Indiana 47408
| | - Y Liu
- Texas A&M University, College Station, Texas 77843
| | - T Ljubicic
- Brookhaven National Laboratory, Upton, New York 11973
| | - W J Llope
- Wayne State University, Detroit, Michigan 48201
| | - M Lomnitz
- Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - R S Longacre
- Brookhaven National Laboratory, Upton, New York 11973
| | - X Luo
- Central China Normal University, Wuhan, Hubei 430079
| | - S Luo
- University of Illinois at Chicago, Chicago, Illinois 60607
| | - G L Ma
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800
| | - Y G Ma
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800
| | - L Ma
- Fudan University, Shanghai 200433
| | - R Ma
- Brookhaven National Laboratory, Upton, New York 11973
| | - N Magdy
- State University of New York, Stony Brook, New York 11794
| | - R Majka
- Yale University, New Haven, Connecticut 06520
| | - D Mallick
- National Institute of Science Education and Research, HBNI, Jatni 752050, India
| | | | - C Markert
- University of Texas, Austin, Texas 78712
| | - H S Matis
- Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - O Matonoha
- Czech Technical University in Prague, FNSPE, Prague 115 19, Czech Republic
| | - D Mayes
- University of California, Riverside, California 92521
| | - J A Mazer
- Rutgers University, Piscataway, New Jersey 08854
| | - K Meehan
- University of California, Davis, California 95616
| | - J C Mei
- Shandong University, Jinan, Shandong 250100
| | - N G Minaev
- Institute of High Energy Physics, Protvino 142281, Russia
| | | | - D Mishra
- National Institute of Science Education and Research, HBNI, Jatni 752050, India
| | - B Mohanty
- National Institute of Science Education and Research, HBNI, Jatni 752050, India
| | - M M Mondal
- Institute of Physics, Bhubaneswar 751005, India
| | - I Mooney
- Wayne State University, Detroit, Michigan 48201
| | - D A Morozov
- Institute of High Energy Physics, Protvino 142281, Russia
| | - Md Nasim
- University of California, Los Angeles, California 90095
| | - J D Negrete
- University of California, Riverside, California 92521
| | - J M Nelson
- University of California, Berkeley, California 94720
| | - D B Nemes
- Yale University, New Haven, Connecticut 06520
| | - M Nie
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800
| | - G Nigmatkulov
- National Research Nuclear University MEPhI, Moscow 115409, Russia
| | - T Niida
- Wayne State University, Detroit, Michigan 48201
| | - L V Nogach
- Institute of High Energy Physics, Protvino 142281, Russia
| | - T Nonaka
- University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - S B Nurushev
- Institute of High Energy Physics, Protvino 142281, Russia
| | - G Odyniec
- Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - A Ogawa
- Brookhaven National Laboratory, Upton, New York 11973
| | - K Oh
- Pusan National University, Pusan 46241, Korea
| | - S Oh
- Yale University, New Haven, Connecticut 06520
| | - V A Okorokov
- National Research Nuclear University MEPhI, Moscow 115409, Russia
| | - D Olvitt
- Temple University, Philadelphia, Pennsylvania 19122
| | - B S Page
- Brookhaven National Laboratory, Upton, New York 11973
| | - R Pak
- Brookhaven National Laboratory, Upton, New York 11973
| | - Y Panebratsev
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | - B Pawlik
- Institute of Nuclear Physics PAN, Cracow 31-342, Poland
| | - H Pei
- Central China Normal University, Wuhan, Hubei 430079
| | - C Perkins
- University of California, Berkeley, California 94720
| | - J Pluta
- Warsaw University of Technology, Warsaw 00-661, Poland
| | - J Porter
- Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - M Posik
- Temple University, Philadelphia, Pennsylvania 19122
| | - N K Pruthi
- Panjab University, Chandigarh 160014, India
| | - M Przybycien
- AGH University of Science and Technology, FPACS, Cracow 30-059, Poland
| | - J Putschke
- Wayne State University, Detroit, Michigan 48201
| | - A Quintero
- Temple University, Philadelphia, Pennsylvania 19122
| | | | | | - R L Ray
- University of Texas, Austin, Texas 78712
| | - R Reed
- Lehigh University, Bethlehem, Pennsylvania 18015
| | - H G Ritter
- Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | | | | | - J L Romero
- University of California, Davis, California 95616
| | - L Ruan
- Brookhaven National Laboratory, Upton, New York 11973
| | - J Rusnak
- Nuclear Physics Institute AS CR, Prague 250 68, Czech Republic
| | - O Rusnakova
- Czech Technical University in Prague, FNSPE, Prague 115 19, Czech Republic
| | - N R Sahoo
- Texas A&M University, College Station, Texas 77843
| | - P K Sahu
- Institute of Physics, Bhubaneswar 751005, India
| | - S Salur
- Rutgers University, Piscataway, New Jersey 08854
| | - J Sandweiss
- Yale University, New Haven, Connecticut 06520
| | | | - A M Schmah
- Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - W B Schmidke
- Brookhaven National Laboratory, Upton, New York 11973
| | - N Schmitz
- Max-Planck-Institut fur Physik, Munich 80805, Germany
| | - B R Schweid
- State University of New York, Stony Brook, New York 11794
| | - F Seck
- Technische Universitat Darmstadt, Darmstadt 64289, Germany
| | - J Seger
- Creighton University, Omaha, Nebraska 68178
| | - M Sergeeva
- University of California, Los Angeles, California 90095
| | - R Seto
- University of California, Riverside, California 92521
| | - P Seyboth
- Max-Planck-Institut fur Physik, Munich 80805, Germany
| | - N Shah
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800
| | - E Shahaliev
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | | | - M Shao
- University of Science and Technology of China, Hefei, Anhui 230026
| | - W Q Shen
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800
| | - F Shen
- Shandong University, Jinan, Shandong 250100
| | - S S Shi
- Central China Normal University, Wuhan, Hubei 430079
| | - Q Y Shou
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800
| | - E P Sichtermann
- Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - S Siejka
- Warsaw University of Technology, Warsaw 00-661, Poland
| | - R Sikora
- AGH University of Science and Technology, FPACS, Cracow 30-059, Poland
| | - M Simko
- Nuclear Physics Institute AS CR, Prague 250 68, Czech Republic
| | - S Singha
- Kent State University, Kent, Ohio 44242
| | - N Smirnov
- Yale University, New Haven, Connecticut 06520
| | - D Smirnov
- Brookhaven National Laboratory, Upton, New York 11973
| | - W Solyst
- Indiana University, Bloomington, Indiana 47408
| | - P Sorensen
- Brookhaven National Laboratory, Upton, New York 11973
| | - H M Spinka
- Argonne National Laboratory, Argonne, Illinois 60439
| | - B Srivastava
- Purdue University, West Lafayette, Indiana 47907
| | | | - D J Stewart
- Yale University, New Haven, Connecticut 06520
| | - M Strikhanov
- National Research Nuclear University MEPhI, Moscow 115409, Russia
| | | | - A A P Suaide
- Universidade de Sao Paulo, Sao Paulo 05314-970, Brazil
| | - T Sugiura
- University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - M Sumbera
- Nuclear Physics Institute AS CR, Prague 250 68, Czech Republic
| | - B Summa
- Pennsylvania State University, University Park, Pennsylvania 16802
| | - Y Sun
- University of Science and Technology of China, Hefei, Anhui 230026
| | - X Sun
- Central China Normal University, Wuhan, Hubei 430079
| | - X M Sun
- Central China Normal University, Wuhan, Hubei 430079
| | - B Surrow
- Temple University, Philadelphia, Pennsylvania 19122
| | - D N Svirida
- Alikhanov Institute for Theoretical and Experimental Physics, Moscow 117218, Russia
| | - P Szymanski
- Warsaw University of Technology, Warsaw 00-661, Poland
| | - Z Tang
- University of Science and Technology of China, Hefei, Anhui 230026
| | - A H Tang
- Brookhaven National Laboratory, Upton, New York 11973
| | - A Taranenko
- National Research Nuclear University MEPhI, Moscow 115409, Russia
| | - T Tarnowsky
- Michigan State University, East Lansing, Michigan 48824
| | - J H Thomas
- Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | | | - D Tlusty
- Rice University, Houston, Texas 77251
| | - T Todoroki
- Brookhaven National Laboratory, Upton, New York 11973
| | - M Tokarev
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | - C A Tomkiel
- Lehigh University, Bethlehem, Pennsylvania 18015
| | - S Trentalange
- University of California, Los Angeles, California 90095
| | - R E Tribble
- Texas A&M University, College Station, Texas 77843
| | - P Tribedy
- Brookhaven National Laboratory, Upton, New York 11973
| | | | - O D Tsai
- University of California, Los Angeles, California 90095
| | - B Tu
- Central China Normal University, Wuhan, Hubei 430079
| | - T Ullrich
- Brookhaven National Laboratory, Upton, New York 11973
| | - D G Underwood
- Argonne National Laboratory, Argonne, Illinois 60439
| | - I Upsal
- Ohio State University, Columbus, Ohio 43210
| | - G Van Buren
- Brookhaven National Laboratory, Upton, New York 11973
| | - J Vanek
- Nuclear Physics Institute AS CR, Prague 250 68, Czech Republic
| | - A N Vasiliev
- Institute of High Energy Physics, Protvino 142281, Russia
| | - I Vassiliev
- Frankfurt Institute for Advanced Studies FIAS, Frankfurt 60438, Germany
| | - F Videbæk
- Brookhaven National Laboratory, Upton, New York 11973
| | - S Vokal
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | | | - A Vossen
- Indiana University, Bloomington, Indiana 47408
| | - G Wang
- University of California, Los Angeles, California 90095
| | - Y Wang
- Central China Normal University, Wuhan, Hubei 430079
| | - F Wang
- Purdue University, West Lafayette, Indiana 47907
| | - Y Wang
- Tsinghua University, Beijing 100084
| | - J C Webb
- Brookhaven National Laboratory, Upton, New York 11973
| | - L Wen
- University of California, Los Angeles, California 90095
| | - G D Westfall
- Michigan State University, East Lansing, Michigan 48824
| | - H Wieman
- Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - S W Wissink
- Indiana University, Bloomington, Indiana 47408
| | - R Witt
- United States Naval Academy, Annapolis, Maryland 21402
| | - Y Wu
- Kent State University, Kent, Ohio 44242
| | - Z G Xiao
- Tsinghua University, Beijing 100084
| | - G Xie
- University of Illinois at Chicago, Chicago, Illinois 60607
| | - W Xie
- Purdue University, West Lafayette, Indiana 47907
| | - Q H Xu
- Shandong University, Jinan, Shandong 250100
| | - Z Xu
- Brookhaven National Laboratory, Upton, New York 11973
| | - J Xu
- Central China Normal University, Wuhan, Hubei 430079
| | - Y F Xu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800
| | - N Xu
- Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - S Yang
- Brookhaven National Laboratory, Upton, New York 11973
| | - C Yang
- Shandong University, Jinan, Shandong 250100
| | - Q Yang
- Shandong University, Jinan, Shandong 250100
| | - Y Yang
- National Cheng Kung University, Tainan 70101
| | - Z Ye
- University of Illinois at Chicago, Chicago, Illinois 60607
| | - Z Ye
- University of Illinois at Chicago, Chicago, Illinois 60607
| | - L Yi
- Shandong University, Jinan, Shandong 250100
| | - K Yip
- Brookhaven National Laboratory, Upton, New York 11973
| | - I-K Yoo
- Pusan National University, Pusan 46241, Korea
| | - N Yu
- Central China Normal University, Wuhan, Hubei 430079
| | - H Zbroszczyk
- Warsaw University of Technology, Warsaw 00-661, Poland
| | - W Zha
- University of Science and Technology of China, Hefei, Anhui 230026
| | - Z Zhang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800
| | - L Zhang
- Central China Normal University, Wuhan, Hubei 430079
| | - Y Zhang
- University of Science and Technology of China, Hefei, Anhui 230026
| | | | - J Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000
| | - S Zhang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800
| | - S Zhang
- University of Science and Technology of China, Hefei, Anhui 230026
| | - J Zhang
- Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - J Zhao
- Purdue University, West Lafayette, Indiana 47907
| | - C Zhong
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800
| | - C Zhou
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800
| | - L Zhou
- University of Science and Technology of China, Hefei, Anhui 230026
| | - Z Zhu
- Shandong University, Jinan, Shandong 250100
| | - X Zhu
- Tsinghua University, Beijing 100084
| | - M Zyzak
- Frankfurt Institute for Advanced Studies FIAS, Frankfurt 60438, Germany
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Adamczyk L, Adkins JK, Agakishiev G, Aggarwal MM, Ahammed Z, Alekseev I, Alford J, Anson CD, Aparin A, Arkhipkin D, Aschenauer EC, Averichev GS, Banerjee A, Barnovska Z, Beavis DR, Bellwied R, Bhasin A, Bhati AK, Bhattarai P, Bichsel H, Bielcik J, Bielcikova J, Bland LC, Bordyuzhin IG, Borowski W, Bouchet J, Brandin AV, Brovko SG, Bültmann S, Bunzarov I, Burton TP, Butterworth J, Caines H, Calderón de la Barca Sánchez M, Cebra D, Cendejas R, Cervantes MC, Chaloupka P, Chang Z, Chattopadhyay S, Chen HF, Chen JH, Chen L, Cheng J, Cherney M, Chikanian A, Christie W, Chwastowski J, Codrington MJM, Cramer JG, Crawford HJ, Cui X, Das S, Davila Leyva A, De Silva LC, Debbe RR, Dedovich TG, Deng J, Derevschikov AA, Derradi de Souza R, Dhamija S, di Ruzza B, Didenko L, Dilks C, Ding F, Djawotho P, Dong X, Drachenberg JL, Draper JE, Du CM, Dunkelberger LE, Dunlop JC, Efimov LG, Engelage J, Engle KS, Eppley G, Eun L, Evdokimov O, Fatemi R, Fazio S, Fedorisin J, Filip P, Finch E, Fisyak Y, Flores CE, Gagliardi CA, Gangadharan DR, Garand D, Geurts F, Gibson A, Girard M, Gliske S, Grosnick D, Guo Y, Gupta A, Gupta S, Guryn W, Haag B, Hajkova O, Hamed A, Han LX, Haque R, Harris JW, Heppelmann S, Hirsch A, Hoffmann GW, Hofman DJ, Horvat S, Huang B, Huang HZ, Huang X, Huck P, Humanic TJ, Igo G, Jacobs WW, Jang H, Judd EG, Kabana S, Kalinkin D, Kang K, Kauder K, Ke HW, Keane D, Kechechyan A, Kesich A, Khan ZH, Kikola DP, Kisel I, Kisiel A, Koetke DD, Kollegger T, Konzer J, Koralt I, Korsch W, Kotchenda L, Kravtsov P, Krueger K, Kulakov I, Kumar L, Kycia RA, Lamont MAC, Landgraf JM, Landry KD, Lauret J, Lebedev A, Lednicky R, Lee JH, LeVine MJ, Li C, Li W, Li X, Li X, Li Y, Li ZM, Lima LM, Lisa MA, Liu F, Ljubicic T, Llope WJ, Longacre RS, Luo X, Ma GL, Ma YG, Madagodagettige Don DMMD, Mahapatra DP, Majka R, Margetis S, Markert C, Masui H, Matis HS, McDonald D, McShane TS, Minaev NG, Mioduszewski S, Mohanty B, Mondal MM, Morozov DA, Munhoz MG, Mustafa MK, Nandi BK, Nasim M, Nayak TK, Nelson JM, Nogach LV, Noh SY, Novak J, Nurushev SB, Odyniec G, Ogawa A, Oh K, Ohlson A, Okorokov V, Oldag EW, Oliveira RAN, Pachr M, Page BS, Pal SK, Pan YX, Pandit Y, Panebratsev Y, Pawlak T, Pawlik B, Pei H, Perkins C, Peryt W, Pile P, Planinic M, Pluta J, Plyku D, Poljak N, Porter J, Poskanzer AM, Pruthi NK, Przybycien M, Pujahari PR, Qiu H, Quintero A, Ramachandran S, Raniwala R, Raniwala S, Ray RL, Riley CK, Ritter HG, Roberts JB, Rogachevskiy OV, Romero JL, Ross JF, Roy A, Ruan L, Rusnak J, Sahoo NR, Sahu PK, Sakrejda I, Salur S, Sandacz A, Sandweiss J, Sangaline E, Sarkar A, Schambach J, Scharenberg RP, Schmah AM, Schmidke WB, Schmitz N, Seger J, Seyboth P, Shah N, Shahaliev E, Shanmuganathan PV, Shao M, Sharma B, Shen WQ, Shi SS, Shou QY, Sichtermann EP, Singaraju RN, Skoby MJ, Smirnov D, Smirnov N, Solanki D, Sorensen P, deSouza UG, Spinka HM, Srivastava B, Stanislaus TDS, Stevens JR, Stock R, Strikhanov M, Stringfellow B, Suaide AAP, Sumbera M, Sun X, Sun XM, Sun Y, Sun Z, Surrow B, Svirida DN, Symons TJM, Szanto de Toledo A, Takahashi J, Tang AH, Tang Z, Tarnowsky T, Thomas JH, Timmins AR, Tlusty D, Tokarev M, Trentalange S, Tribble RE, Tribedy P, Trzeciak BA, Tsai OD, Turnau J, Ullrich T, Underwood DG, Van Buren G, van Nieuwenhuizen G, Vanfossen JA, Varma R, Vasconcelos GMS, Vasiliev AN, Vertesi R, Videbæk F, Viyogi YP, Vokal S, Vossen A, Wada M, Wang F, Wang G, Wang H, Wang JS, Wang XL, Wang Y, Wang Y, Webb G, Webb JC, Westfall GD, Wieman H, Wissink SW, Witt R, Wu YF, Xiao Z, Xie W, Xin K, Xu H, Xu N, Xu QH, Xu Y, Xu Z, Yan W, Yang C, Yang Y, Yang Y, Ye Z, Yepes P, Yi L, Yip K, Yoo IK, Zawisza Y, Zbroszczyk H, Zha W, Zhang JB, Zhang JL, Zhang S, Zhang XP, Zhang Y, Zhang ZP, Zhao F, Zhao J, Zhong C, Zhu X, Zhu YH, Zoulkarneeva Y, Zyzak M. Dielectron mass spectra from Au+Au collisions at √[s(NN)]=200 GeV. Phys Rev Lett 2014; 113:022301. [PMID: 25062167 DOI: 10.1103/physrevlett.113.022301] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2013] [Indexed: 06/03/2023]
Abstract
We report the STAR measurements of dielectron (e(+)e(-)) production at midrapidity (|y(ee)|<1) in Au+Au collisions at √[s(NN)]=200 GeV. The measurements are evaluated in different invariant mass regions with a focus on 0.30-0.76 (ρ-like), 0.76-0.80 (ω-like), and 0.98-1.05 (ϕ-like) GeV/c(2). The spectrum in the ω-like and ϕ-like regions can be well described by the hadronic cocktail simulation. In the ρ-like region, however, the vacuum ρ spectral function cannot describe the shape of the dielectron excess. In this range, an enhancement of 1.77±0.11(stat)±0.24(syst)±0.33(cocktail) is determined with respect to the hadronic cocktail simulation that excludes the ρ meson. The excess yield in the ρ-like region increases with the number of collision participants faster than the ω and ϕ yields. Theoretical models with broadened ρ contributions through interactions with constituents in the hot QCD medium provide a consistent description of the dilepton mass spectra for the measurement presented here and the earlier data at the Super Proton Synchrotron energies.
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Affiliation(s)
- L Adamczyk
- AGH University of Science and Technology, Cracow, Poland
| | - J K Adkins
- University of Kentucky, Lexington, Kentucky 40506-0055, USA
| | - G Agakishiev
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | | | - Z Ahammed
- Variable Energy Cyclotron Centre, Kolkata 700064, India
| | - I Alekseev
- Alikhanov Institute for Theoretical and Experimental Physics, Moscow, Russia
| | - J Alford
- Kent State University, Kent, Ohio 44242, USA
| | - C D Anson
- Ohio State University, Columbus, Ohio 43210, USA
| | - A Aparin
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | - D Arkhipkin
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - E C Aschenauer
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - G S Averichev
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | - A Banerjee
- Variable Energy Cyclotron Centre, Kolkata 700064, India
| | - Z Barnovska
- Nuclear Physics Institute AS CR, 250 68 Řež/1:108793 Prague, Czech Republic
| | - D R Beavis
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - R Bellwied
- University of Houston, Houston, Texas 77204, USA
| | - A Bhasin
- University of Jammu, Jammu 180001, India
| | - A K Bhati
- Panjab University, Chandigarh 160014, India
| | - P Bhattarai
- University of Texas, Austin, Texas 78712, USA
| | - H Bichsel
- University of Washington, Seattle, Washington 98195, USA
| | - J Bielcik
- Czech Technical University in Prague, FNSPE, Prague, 115 19, Czech Republic
| | - J Bielcikova
- Nuclear Physics Institute AS CR, 250 68 Řež/1:108793 Prague, Czech Republic
| | - L C Bland
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - I G Bordyuzhin
- Alikhanov Institute for Theoretical and Experimental Physics, Moscow, Russia
| | | | - J Bouchet
- Kent State University, Kent, Ohio 44242, USA
| | - A V Brandin
- Moscow Engineering Physics Institute, Moscow Russia
| | - S G Brovko
- University of California, Davis, California 95616, USA
| | - S Bültmann
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - I Bunzarov
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | - T P Burton
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | | | - H Caines
- Yale University, New Haven, Connecticut 06520, USA
| | | | - D Cebra
- University of California, Davis, California 95616, USA
| | - R Cendejas
- Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - M C Cervantes
- Texas A&M University, College Station, Texas 77843, USA
| | - P Chaloupka
- Czech Technical University in Prague, FNSPE, Prague, 115 19, Czech Republic
| | - Z Chang
- Texas A&M University, College Station, Texas 77843, USA
| | | | - H F Chen
- University of Science and Technology of China, Hefei 230026, China
| | - J H Chen
- Shanghai Institute of Applied Physics, Shanghai 201800, China
| | - L Chen
- Central China Normal University (HZNU), Wuhan 430079, China
| | - J Cheng
- Tsinghua University, Beijing 100084, China
| | - M Cherney
- Creighton University, Omaha, Nebraska 68178, USA
| | - A Chikanian
- Yale University, New Haven, Connecticut 06520, USA
| | - W Christie
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | | | | | - J G Cramer
- University of Washington, Seattle, Washington 98195, USA
| | - H J Crawford
- University of California, Berkeley, California 94720, USA
| | - X Cui
- University of Science and Technology of China, Hefei 230026, China
| | - S Das
- Institute of Physics, Bhubaneswar 751005, India
| | | | - L C De Silva
- University of Houston, Houston, Texas 77204, USA
| | - R R Debbe
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - T G Dedovich
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | - J Deng
- Shandong University, Jinan, Shandong 250100, China
| | | | | | - S Dhamija
- Indiana University, Bloomington, Indiana 47408, USA
| | - B di Ruzza
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - L Didenko
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - C Dilks
- Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - F Ding
- University of California, Davis, California 95616, USA
| | - P Djawotho
- Texas A&M University, College Station, Texas 77843, USA
| | - X Dong
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | | | - J E Draper
- University of California, Davis, California 95616, USA
| | - C M Du
- Institute of Modern Physics, Lanzhou, China
| | | | - J C Dunlop
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - L G Efimov
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | - J Engelage
- University of California, Berkeley, California 94720, USA
| | - K S Engle
- United States Naval Academy, Annapolis, Maryland 21402, USA
| | - G Eppley
- Rice University, Houston, Texas 77251, USA
| | - L Eun
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - O Evdokimov
- University of Illinois at Chicago, Chicago, Illinois 60607, USA
| | - R Fatemi
- University of Kentucky, Lexington, Kentucky 40506-0055, USA
| | - S Fazio
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - J Fedorisin
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | - P Filip
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | - E Finch
- Yale University, New Haven, Connecticut 06520, USA
| | - Y Fisyak
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - C E Flores
- University of California, Davis, California 95616, USA
| | - C A Gagliardi
- Texas A&M University, College Station, Texas 77843, USA
| | | | - D Garand
- Purdue University, West Lafayette, Indiana 47907, USA
| | - F Geurts
- Rice University, Houston, Texas 77251, USA
| | - A Gibson
- Valparaiso University, Valparaiso, Indiana 46383, USA
| | - M Girard
- Warsaw University of Technology, Warsaw, Poland
| | - S Gliske
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - D Grosnick
- Valparaiso University, Valparaiso, Indiana 46383, USA
| | - Y Guo
- University of Science and Technology of China, Hefei 230026, China
| | - A Gupta
- University of Jammu, Jammu 180001, India
| | - S Gupta
- University of Jammu, Jammu 180001, India
| | - W Guryn
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - B Haag
- University of California, Davis, California 95616, USA
| | - O Hajkova
- Czech Technical University in Prague, FNSPE, Prague, 115 19, Czech Republic
| | - A Hamed
- Texas A&M University, College Station, Texas 77843, USA
| | - L-X Han
- Shanghai Institute of Applied Physics, Shanghai 201800, China
| | - R Haque
- National Institute of Science Education and Research, Bhubaneswar 751005, India
| | - J W Harris
- Yale University, New Haven, Connecticut 06520, USA
| | - S Heppelmann
- Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - A Hirsch
- Purdue University, West Lafayette, Indiana 47907, USA
| | | | - D J Hofman
- University of Illinois at Chicago, Chicago, Illinois 60607, USA
| | - S Horvat
- Yale University, New Haven, Connecticut 06520, USA
| | - B Huang
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - H Z Huang
- University of California, Los Angeles, California 90095, USA
| | - X Huang
- Tsinghua University, Beijing 100084, China
| | - P Huck
- Central China Normal University (HZNU), Wuhan 430079, China
| | - T J Humanic
- Ohio State University, Columbus, Ohio 43210, USA
| | - G Igo
- University of California, Los Angeles, California 90095, USA
| | - W W Jacobs
- Indiana University, Bloomington, Indiana 47408, USA
| | - H Jang
- Korea Institute of Science and Technology Information, Daejeon, Korea
| | - E G Judd
- University of California, Berkeley, California 94720, USA
| | | | - D Kalinkin
- Alikhanov Institute for Theoretical and Experimental Physics, Moscow, Russia
| | - K Kang
- Tsinghua University, Beijing 100084, China
| | - K Kauder
- University of Illinois at Chicago, Chicago, Illinois 60607, USA
| | - H W Ke
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - D Keane
- Kent State University, Kent, Ohio 44242, USA
| | - A Kechechyan
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | - A Kesich
- University of California, Davis, California 95616, USA
| | - Z H Khan
- University of Illinois at Chicago, Chicago, Illinois 60607, USA
| | - D P Kikola
- Warsaw University of Technology, Warsaw, Poland
| | - I Kisel
- Frankfurt Institute for Advanced Studies FIAS, Germany
| | - A Kisiel
- Warsaw University of Technology, Warsaw, Poland
| | - D D Koetke
- Valparaiso University, Valparaiso, Indiana 46383, USA
| | - T Kollegger
- Frankfurt Institute for Advanced Studies FIAS, Germany
| | - J Konzer
- Purdue University, West Lafayette, Indiana 47907, USA
| | - I Koralt
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - W Korsch
- University of Kentucky, Lexington, Kentucky 40506-0055, USA
| | - L Kotchenda
- Moscow Engineering Physics Institute, Moscow Russia
| | - P Kravtsov
- Moscow Engineering Physics Institute, Moscow Russia
| | - K Krueger
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - I Kulakov
- Frankfurt Institute for Advanced Studies FIAS, Germany
| | - L Kumar
- National Institute of Science Education and Research, Bhubaneswar 751005, India
| | - R A Kycia
- Cracow University of Technology, Cracow, Poland
| | - M A C Lamont
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - J M Landgraf
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - K D Landry
- University of California, Los Angeles, California 90095, USA
| | - J Lauret
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - A Lebedev
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - R Lednicky
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | - J H Lee
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - M J LeVine
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - C Li
- University of Science and Technology of China, Hefei 230026, China
| | - W Li
- Shanghai Institute of Applied Physics, Shanghai 201800, China
| | - X Li
- Purdue University, West Lafayette, Indiana 47907, USA
| | - X Li
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - Y Li
- Tsinghua University, Beijing 100084, China
| | - Z M Li
- Central China Normal University (HZNU), Wuhan 430079, China
| | - L M Lima
- Universidade de Sao Paulo, Sao Paulo, Brazil
| | - M A Lisa
- Ohio State University, Columbus, Ohio 43210, USA
| | - F Liu
- Central China Normal University (HZNU), Wuhan 430079, China
| | - T Ljubicic
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - W J Llope
- Rice University, Houston, Texas 77251, USA
| | - R S Longacre
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - X Luo
- Central China Normal University (HZNU), Wuhan 430079, China
| | - G L Ma
- Shanghai Institute of Applied Physics, Shanghai 201800, China
| | - Y G Ma
- Shanghai Institute of Applied Physics, Shanghai 201800, China
| | | | | | - R Majka
- Yale University, New Haven, Connecticut 06520, USA
| | - S Margetis
- Kent State University, Kent, Ohio 44242, USA
| | - C Markert
- University of Texas, Austin, Texas 78712, USA
| | - H Masui
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - H S Matis
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - D McDonald
- University of Houston, Houston, Texas 77204, USA
| | - T S McShane
- Creighton University, Omaha, Nebraska 68178, USA
| | - N G Minaev
- Institute of High Energy Physics, Protvino, Russia
| | | | - B Mohanty
- National Institute of Science Education and Research, Bhubaneswar 751005, India
| | - M M Mondal
- Texas A&M University, College Station, Texas 77843, USA
| | - D A Morozov
- Institute of High Energy Physics, Protvino, Russia
| | - M G Munhoz
- Universidade de Sao Paulo, Sao Paulo, Brazil
| | - M K Mustafa
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - B K Nandi
- Indian Institute of Technology, Mumbai 400076, India
| | - Md Nasim
- National Institute of Science Education and Research, Bhubaneswar 751005, India
| | - T K Nayak
- Variable Energy Cyclotron Centre, Kolkata 700064, India
| | - J M Nelson
- University of Birmingham, Birmingham, United Kingdom
| | - L V Nogach
- Institute of High Energy Physics, Protvino, Russia
| | - S Y Noh
- Korea Institute of Science and Technology Information, Daejeon, Korea
| | - J Novak
- Michigan State University, East Lansing, Michigan 48824, USA
| | - S B Nurushev
- Institute of High Energy Physics, Protvino, Russia
| | - G Odyniec
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - A Ogawa
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - K Oh
- Pusan National University, Pusan, Republic of Korea
| | - A Ohlson
- Yale University, New Haven, Connecticut 06520, USA
| | - V Okorokov
- Moscow Engineering Physics Institute, Moscow Russia
| | - E W Oldag
- University of Texas, Austin, Texas 78712, USA
| | | | - M Pachr
- Czech Technical University in Prague, FNSPE, Prague, 115 19, Czech Republic
| | - B S Page
- Indiana University, Bloomington, Indiana 47408, USA
| | - S K Pal
- Variable Energy Cyclotron Centre, Kolkata 700064, India
| | - Y X Pan
- University of California, Los Angeles, California 90095, USA
| | - Y Pandit
- University of Illinois at Chicago, Chicago, Illinois 60607, USA
| | - Y Panebratsev
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | - T Pawlak
- Warsaw University of Technology, Warsaw, Poland
| | - B Pawlik
- Institute of Nuclear Physics PAN, Cracow, Poland
| | - H Pei
- Central China Normal University (HZNU), Wuhan 430079, China
| | - C Perkins
- University of California, Berkeley, California 94720, USA
| | - W Peryt
- Warsaw University of Technology, Warsaw, Poland
| | - P Pile
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - M Planinic
- University of Zagreb, Zagreb HR-10002, Croatia
| | - J Pluta
- Warsaw University of Technology, Warsaw, Poland
| | - D Plyku
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - N Poljak
- University of Zagreb, Zagreb HR-10002, Croatia
| | - J Porter
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - A M Poskanzer
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - N K Pruthi
- Panjab University, Chandigarh 160014, India
| | - M Przybycien
- AGH University of Science and Technology, Cracow, Poland
| | - P R Pujahari
- Indian Institute of Technology, Mumbai 400076, India
| | - H Qiu
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - A Quintero
- Kent State University, Kent, Ohio 44242, USA
| | - S Ramachandran
- University of Kentucky, Lexington, Kentucky 40506-0055, USA
| | - R Raniwala
- University of Rajasthan, Jaipur 302004, India
| | - S Raniwala
- University of Rajasthan, Jaipur 302004, India
| | - R L Ray
- University of Texas, Austin, Texas 78712, USA
| | - C K Riley
- Yale University, New Haven, Connecticut 06520, USA
| | - H G Ritter
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | | | | | - J L Romero
- University of California, Davis, California 95616, USA
| | - J F Ross
- Creighton University, Omaha, Nebraska 68178, USA
| | - A Roy
- Variable Energy Cyclotron Centre, Kolkata 700064, India
| | - L Ruan
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - J Rusnak
- Nuclear Physics Institute AS CR, 250 68 Řež/1:108793 Prague, Czech Republic
| | - N R Sahoo
- Variable Energy Cyclotron Centre, Kolkata 700064, India
| | - P K Sahu
- Institute of Physics, Bhubaneswar 751005, India
| | - I Sakrejda
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - S Salur
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - A Sandacz
- Warsaw University of Technology, Warsaw, Poland
| | - J Sandweiss
- Yale University, New Haven, Connecticut 06520, USA
| | - E Sangaline
- University of California, Davis, California 95616, USA
| | - A Sarkar
- Indian Institute of Technology, Mumbai 400076, India
| | - J Schambach
- University of Texas, Austin, Texas 78712, USA
| | | | - A M Schmah
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - W B Schmidke
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - N Schmitz
- Max-Planck-Institut für Physik, Munich, Germany
| | - J Seger
- Creighton University, Omaha, Nebraska 68178, USA
| | - P Seyboth
- Max-Planck-Institut für Physik, Munich, Germany
| | - N Shah
- University of California, Los Angeles, California 90095, USA
| | - E Shahaliev
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | | | - M Shao
- University of Science and Technology of China, Hefei 230026, China
| | - B Sharma
- Panjab University, Chandigarh 160014, India
| | - W Q Shen
- Shanghai Institute of Applied Physics, Shanghai 201800, China
| | - S S Shi
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Q Y Shou
- Shanghai Institute of Applied Physics, Shanghai 201800, China
| | - E P Sichtermann
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - R N Singaraju
- Variable Energy Cyclotron Centre, Kolkata 700064, India
| | - M J Skoby
- Indiana University, Bloomington, Indiana 47408, USA
| | - D Smirnov
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - N Smirnov
- Yale University, New Haven, Connecticut 06520, USA
| | - D Solanki
- University of Rajasthan, Jaipur 302004, India
| | - P Sorensen
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - U G deSouza
- Universidade de Sao Paulo, Sao Paulo, Brazil
| | - H M Spinka
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - B Srivastava
- Purdue University, West Lafayette, Indiana 47907, USA
| | | | - J R Stevens
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA
| | - R Stock
- Frankfurt Institute for Advanced Studies FIAS, Germany
| | - M Strikhanov
- Moscow Engineering Physics Institute, Moscow Russia
| | | | | | - M Sumbera
- Nuclear Physics Institute AS CR, 250 68 Řež/1:108793 Prague, Czech Republic
| | - X Sun
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - X M Sun
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Y Sun
- University of Science and Technology of China, Hefei 230026, China
| | - Z Sun
- Institute of Modern Physics, Lanzhou, China
| | - B Surrow
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - D N Svirida
- Alikhanov Institute for Theoretical and Experimental Physics, Moscow, Russia
| | - T J M Symons
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | | | - J Takahashi
- Universidade Estadual de Campinas, Sao Paulo, Brazil
| | - A H Tang
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Z Tang
- University of Science and Technology of China, Hefei 230026, China
| | - T Tarnowsky
- Michigan State University, East Lansing, Michigan 48824, USA
| | - J H Thomas
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - A R Timmins
- University of Houston, Houston, Texas 77204, USA
| | - D Tlusty
- Nuclear Physics Institute AS CR, 250 68 Řež/1:108793 Prague, Czech Republic
| | - M Tokarev
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | - S Trentalange
- University of California, Los Angeles, California 90095, USA
| | - R E Tribble
- Texas A&M University, College Station, Texas 77843, USA
| | - P Tribedy
- Variable Energy Cyclotron Centre, Kolkata 700064, India
| | | | - O D Tsai
- University of California, Los Angeles, California 90095, USA
| | - J Turnau
- Institute of Nuclear Physics PAN, Cracow, Poland
| | - T Ullrich
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - D G Underwood
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - G Van Buren
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - G van Nieuwenhuizen
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA
| | | | - R Varma
- Indian Institute of Technology, Mumbai 400076, India
| | | | - A N Vasiliev
- Institute of High Energy Physics, Protvino, Russia
| | - R Vertesi
- Nuclear Physics Institute AS CR, 250 68 Řež/1:108793 Prague, Czech Republic
| | - F Videbæk
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Y P Viyogi
- Variable Energy Cyclotron Centre, Kolkata 700064, India
| | - S Vokal
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | - A Vossen
- Indiana University, Bloomington, Indiana 47408, USA
| | - M Wada
- University of Texas, Austin, Texas 78712, USA
| | - F Wang
- Purdue University, West Lafayette, Indiana 47907, USA
| | - G Wang
- University of California, Los Angeles, California 90095, USA
| | - H Wang
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - J S Wang
- Institute of Modern Physics, Lanzhou, China
| | - X L Wang
- University of Science and Technology of China, Hefei 230026, China
| | - Y Wang
- Tsinghua University, Beijing 100084, China
| | - Y Wang
- University of Illinois at Chicago, Chicago, Illinois 60607, USA
| | - G Webb
- University of Kentucky, Lexington, Kentucky 40506-0055, USA
| | - J C Webb
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - G D Westfall
- Michigan State University, East Lansing, Michigan 48824, USA
| | - H Wieman
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - S W Wissink
- Indiana University, Bloomington, Indiana 47408, USA
| | - R Witt
- United States Naval Academy, Annapolis, Maryland 21402, USA
| | - Y F Wu
- Central China Normal University (HZNU), Wuhan 430079, China
| | - Z Xiao
- Tsinghua University, Beijing 100084, China
| | - W Xie
- Purdue University, West Lafayette, Indiana 47907, USA
| | - K Xin
- Rice University, Houston, Texas 77251, USA
| | - H Xu
- Institute of Modern Physics, Lanzhou, China
| | - N Xu
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Q H Xu
- Shandong University, Jinan, Shandong 250100, China
| | - Y Xu
- University of Science and Technology of China, Hefei 230026, China
| | - Z Xu
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - W Yan
- Tsinghua University, Beijing 100084, China
| | - C Yang
- University of Science and Technology of China, Hefei 230026, China
| | - Y Yang
- Institute of Modern Physics, Lanzhou, China
| | - Y Yang
- Central China Normal University (HZNU), Wuhan 430079, China
| | - Z Ye
- University of Illinois at Chicago, Chicago, Illinois 60607, USA
| | - P Yepes
- Rice University, Houston, Texas 77251, USA
| | - L Yi
- Purdue University, West Lafayette, Indiana 47907, USA
| | - K Yip
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - I-K Yoo
- Pusan National University, Pusan, Republic of Korea
| | - Y Zawisza
- University of Science and Technology of China, Hefei 230026, China
| | | | - W Zha
- University of Science and Technology of China, Hefei 230026, China
| | - J B Zhang
- Central China Normal University (HZNU), Wuhan 430079, China
| | - J L Zhang
- Shandong University, Jinan, Shandong 250100, China
| | - S Zhang
- Shanghai Institute of Applied Physics, Shanghai 201800, China
| | - X P Zhang
- Tsinghua University, Beijing 100084, China
| | - Y Zhang
- University of Science and Technology of China, Hefei 230026, China
| | - Z P Zhang
- University of Science and Technology of China, Hefei 230026, China
| | - F Zhao
- University of California, Los Angeles, California 90095, USA
| | - J Zhao
- Central China Normal University (HZNU), Wuhan 430079, China and Shanghai Institute of Applied Physics, Shanghai 201800, China
| | - C Zhong
- Shanghai Institute of Applied Physics, Shanghai 201800, China
| | - X Zhu
- Tsinghua University, Beijing 100084, China
| | - Y H Zhu
- Shanghai Institute of Applied Physics, Shanghai 201800, China
| | - Y Zoulkarneeva
- Joint Institute for Nuclear Research, Dubna 141 980, Russia
| | - M Zyzak
- Frankfurt Institute for Advanced Studies FIAS, Germany
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