Phys. Rev. C
79,
024906
(2009)
[14 pages]
Beam-energy and system-size dependence of dynamical net charge fluctuations
B. I. Abelev et al. STAR Collaboration
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B. I. Abelev8, M. M. Aggarwal30, Z. Ahammed47, B. D. Anderson18, D. Arkhipkin12, G. S. Averichev11, Y. Bai27, J. Balewski22, O. Barannikova8, L. S. Barnby2, J. Baudot16, S. Baumgart52, D. R. Beavis3, R. Bellwied50, F. Benedosso27, R. R. Betts8, S. Bhardwaj35, A. Bhasin17, A. K. Bhati30, H. Bichsel49, J. Bielcik10, J. Bielcikova10, B. Biritz6, L. C. Bland3, M. Bombara2, B. E. Bonner36, M. Botje27, J. Bouchet18, E. Braidot27, A. V. Brandin25, S. Bueltmann29, T. P. Burton2, M. Bystersky10, X. Z. Cai40, H. Caines52, M. Calderón de la Barca Sánchez5, J. Callner8, O. Catu52, D. Cebra5, R. Cendejas6, M. C. Cervantes42, Z. Chajecki28, P. Chaloupka10, S. Chattopadhyay47, H. F. Chen38, J. H. Chen18, J. Y. Chen51, J. Cheng44, M. Cherney9, A. Chikanian52, K. E. Choi34, W. Christie3, S. U. Chung3, R. F. Clarke42, M. J. M. Codrington42, J. P. Coffin16, T. M. Cormier50, M. R. Cosentino37, J. G. Cramer49, H. J. Crawford4, D. Das5, S. Dash13, M. Daugherity43, M. M. de Moira37, T. G. Dedovich11, M. DePhillips3, A. A. Derevschikov32, R. Derradi de Souza7, L. Didenko3, T. Dictel3, P. Djawotho42, S. M. Dogra17, X. Dong21, J. L. Drachenberg42, J. E. Draper5, F. Du52, J. C. Dunlop3, M. R. Dutta Mazumdar47, W. R. Edwards21, L. G. Efimov11, E. Elhalhuli2, M. Elnimr50, V. Emelianov25, J. Engelage4, G. Eppley36, B. Erazmus41, M. Estienne16, L. Eun31, P. Fachini3, R. Fatemi19, J. Fedorisin11, A. Feng51, P. Filip12, E. Finch52, V. Fine3, Y. Fisyak3, C. A. Gagliardi42, L. Gaillard2, D. R. Gangadharan6, M. S. Ganti47, E. Garcia-Solis8, V. Ghazikhanian6, P. Ghosh47, Y. N. Gorbunov9, A. Gordon3, O. Grebenyuk21, D. Grosnick46, B. Grube34, S. M. Guertin6, K. S. F. F. Guimaraes37, A. Gupta17, N. Gupta17, W. Guryn3, T. J. Hallman3, A. Hamed42, J. W. Harris52, W. He15, M. Heinz52, S. Heppelmann31, B. Hippolyte16, A. Hirsch33, E. Hjort21, A. M. Hoffman22, G. W. Hoffmann43, D. J. Hofman8, R. S. Hollis8, H. Z. Huang6, T. J. Humanic28, L. Huo42, G. Igo6, A. Iordanova8, P. Jacobs21, W. W. Jacobs15, P. Jakl10, C. Jena13, F. Jin40, C. L. Jones22, P. G. Jones2, J. Joseph18, E. G. Judd4, S. Kabana41, K. Kajimoto43, K. Kang44, J. Kapitan10, M. Kaplan54, D. Keane18, A. Kechechyan11, D. Kettler49, V. Yu. Khodyrev32, J. Kiryluk21, A. Kisiel28, S. R. Klein21, A. G. Knospe52, A. Kocoloski22, D. D. Koetke46, M. Kopytine18, L. Kotchenda25, V. Kouchpil10, P. Kravtsov25, V. I. Kravtsov32, K. Krueger1, C. Kuhn16, A. Kumar30, L. Kumar30, P. Kurnadi6, M. A. C. Lamont3, J. M. Landgraf3, S. LaPointe50, F. Laue3, J. Lauret3, A. Lebedev3, R. Lednicky12, C.-H. Lee34, M. J. LeVine3, C. Li38, Y. Li44, G. Lin52, X. Lin51, S. J. Lindenbaum26, M. A. Lisa28, F. Liu51, J. Liu36, L. Liu51, T. Ljubicic3, W. J. Llope36, R. S. Longacre3, Y. Lu38, T. Ludlam3, D. Lynn3, G. L. Ma40, J. G. Ma5, Y. G. Ma40, D. P. Mahapatra13, R. Majka52, L. K. Mangotra17, R. Manweiler46, S. Margetis18, C. Markert43, H. S. Matis21, Yu. A. Matulenko32, T. S. McShane9, A. Meschanin32, J. Millane22, M. L. Miller22, N. G. Minaev32, S. Mioduszewski42, A. Mischke27, J. Mitchell36, B. Mohanty47, D. A. Morozov32, M. G. Munhoz37, B. K. Nandi14, C. Nattrass52, T. K. Nayak47, J. M. Nelson2, C. Nepali18, P. K. Netrakanti33, M. J. Ng4, L. V. Nogach32, S. B. Nurushev32, G. Odyniec21, A. Ogawa3, H. Okada3, V. Okorokov25, D. Olson21, M. Pachr10, S. K. Pal47, Y. Panebratsev11, T. Pawlak48, T. Peitzmann27, V. Perevoztchikov3, C. Perkins4, W. Peryt48, S. C. Phatak13, M. Planinic53, J. Pluta48, N. Poljak53, N. Porile33, A. M. Poskanzer21, M. Potekhin3, B. V. K. S. Potukuchi17, D. Prindle49, C. Pruneau50, N. K. Pruthi30, J. Putschke52, R. Raniwala35, S. Raniwala35, R. L. Ray43, A. Ridiger25, H. G. Ritter21, J. B. Roberts36, O. V. Rogachevskiy11, J. L. Romero5, A. Rose21, C. Roy41, L. Ruan3, M. J. Russcher27, V. Rykov3, R. Sahoo41, I. Sakrejda21, T. Sakuma22, S. Salur21, J. Sandweiss52, M. Sarsour42, J. Schambach43, R. P. Scharenberg33, N. Schmitz23, J. Seger9, I. Selyuzhenkov15, P. Seyboth23, A. Shabetai16, E. Shahaliev11, M. Shao38, M. Sharma50, S. S. Shi51, X.-H. Shi40, E. P. Sichtermann21, F. Simon23, R. N. Singaraju47, M. J. Skoby33, N. Smirnov52, R. Snellings27, P. Sorensen3, J. Sowinski15, H. M. Spinka1, B. Srivastava33, A. Stadnik11, T. D. S. Stanislaus46, D. Staszak6, M. Strikhanov25, B. Stringfellow33, A. A. P. Suaide37, M. C. Suarez8, N. L. Subba18, M. Sumbera10, X. M. Sun21, Y. Sun38, Z. Sun20, B. Surrow22, T. J. M. Symons21, A. Szanto de Toledo37, J. Takahashi7, A. H. Tang3, Z. Tang38, T. Tarnowsky33, D. Thein43, J. H. Thomas21, J. Tian40, A. R. Timmins2, S. Timoshenko25, M. Tokarev11, V. N. Tram21, A. L. Trattner4, S. Trentalange6, R. E. Tribble42, O. D. Tsai6, J. Ulery33, T. Ullrich3, D. G. Underwood1, G. Van Buren3, N. van der Kolk27, M. van Leeuwen27, A. M. Vander Molen24, R. Varma14, G. M. S. Vasconcelos7, I. M. Vasilevski12, A. N. Vasiliev32, F. Videbaek3, S. E. Vigdor15, Y. P. Viyogi13, S. Vokal11, S. A. Voloshin50, M. Wada43, W. T. Waggoner9, F. Wang33, G. Wang6, J. S. Wang20, Q. Wang33, X. Wang44, X. L. Wang38, Y. Wang44, J. C. Webb46, G. D. Westfall24, C. Whitten, Jr.6, H. Wieman21, S. W. Wissink15, R. Witt45, J. Wu38, Y. Wu51, N. Xu21, Q. H. Xu39, Y. Xu38, Z. Xu3, P. Yepes36, I.-K. Yoo34, Q. Yue44, M. Zawisza48, H. Zbroszczyk48, W. Zhan20, H. Zhang3, S. Zhang40, W. M. Zhang18, Y. Zhang21, Z. P. Zhang38, Y. Zhao38, C. Zhong40, J. Zhou36, R. Zoulkarneev12, Y. Zoulkarneeva12, and J. X. Zuo40 (STAR Collaboration)
1Argonne National Laboratory, Argonne, Illinois 60439, USA
2University of Birmingham, Birmingham, United Kingdom
3Brookhaven National Laboratory, Upton, New York 11973, USA
4University of California, Berkeley, California 94720, USA
5University of California, Davis, California 95616, USA
6University of California, Los Angeles, California 90095, USA
7Universidade Estadual de Campinas, Sao Paulo, Brazil
8University of Illinois at Chicago, Chicago, Illinois 60607, USA
9Creighton University, Omaha, Nebraska 68178, USA
10Nuclear Physics Institute AS CR, 250 68 Řež/Prague, Czech Republic
11Laboratory for High Energy (JINR), Dubna, Russia
12Particle Physics Laboratory (JINR), Dubna, Russia
13Institute of Physics, Bhubaneswar 751005, India
14Indian Institute of Technology, Mumbai, India
15Indiana University, Bloomington, Indiana 47408, USA
16Institut de Recherches Subatomiques, Strasbourg, France
17University of Jammu, Jammu 180001, India
18Kent State University, Kent, Ohio 44242, USA
19University of Kentucky, Lexington, Kentucky, 40506-0055, USA
20Institute of Modern Physics, Lanzhou, People's Republic of China
21Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
22Massachusetts Institute of Technology, Cambridge, MA 02139-4307, USA
23Max-Planck-Institut für Physik, Munich, Germany
24Michigan State University, East Lansing, Michigan 48824, USA
25Moscow Engineering Physics Institute, Moscow, Russia
26City College of New York, New York City, New York 10031, USA
27NIKHEF and Utrecht University, Amsterdam, The Netherlands
28Ohio State University, Columbus, Ohio 43210, USA
29Old Dominion University, Norfolk, VA, 23529, USA
30Panjab University, Chandigarh 160014, India
31Pennsylvania State University, University Park, Pennsylvania 16802, USA
32Institute of High Energy Physics, Protvino, Russia
33Purdue University, West Lafayette, Indiana 47907, USA
34Pusan National University, Pusan, Republic of Korea
35University of Rajasthan, Jaipur 302004, India
36Rice University, Houston, Texas 77251, USA
37Universidade de Sao Paulo, Sao Paulo, Brazil
38University of Science & Technology of China, Hefei 230026, People's Republic of China
39Shandong University, Jinan, Shandong 250100, People's Republic of China
40Shanghai Institute of Applied Physics, Shanghai 201800, People's Republic of China
41SUBATECH, Nantes, France
42Texas A&M University, College Station, Texas 77843, USA
43University of Texas, Austin, Texas 78712, USA
44Tsinghua University, Beijing 100084, People's Republic of China
45United States Naval Academy, Annapolis, MD 21402, USA
46Valparaiso University, Valparaiso, Indiana 46383, USA
47Variable Energy Cyclotron Centre, Kolkata 700064, India
48Warsaw University of Technology, Warsaw, Poland
49University of Washington, Seattle, Washington 98195, USA
50Wayne State University, Detroit, Michigan 48201, USA
51Institute of Particle Physics, CCNU (HZNU), Wuhan 430079, People's Republic of China
52Yale University, New Haven, Connecticut 06520, USA
53University of Zagreb, Zagreb, HR-10002, Croatia
54Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
Received 21 July 2008; published 25 February 2009
We present measurements of net charge fluctuations in Au+Au collisions at √sNN=19.6, 62.4, 130, and 200 GeV, Cu+Cu collisions at √sNN=62.4 and 200 GeV, and p+p collisions at √s=200 GeV using the dynamical net charge fluctuations measure ν+-,dyn. We observe that the dynamical fluctuations are nonzero at all energies and exhibit a modest dependence on beam energy. A weak system size dependence is also observed. We examine the collision centrality dependence of the net charge fluctuations and find that dynamical net charge fluctuations violate 1/Nch scaling but display approximate 1/Npart scaling. We also study the azimuthal and rapidity dependence of the net charge correlation strength and observe strong dependence on the azimuthal angular range and pseudorapidity widths integrated to measure the correlation.
© 2009 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevC.79.024906
DOI:
10.1103/PhysRevC.79.024906
PACS:
25.75.Gz, 25.75.Ld, 24.60.Ky
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