Phys. Rev. C
73,
034903
(2006)
[7 pages]
Directed flow in Au+Au collisions at √sNN=62.4 GeV
J. Adams et al. STAR Collaboration
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J. Adams3, M. M. Aggarwal29, Z. Ahammed44, J. Amonett20, B. D. Anderson20, D. Arkhipkin13, G. S. Averichev12, S. K. Badyal19, Y. Bai27, J. Balewski17, O. Barannikova32, L. S. Barnby3, J. Baudot18, S. Bekele28, V. V. Belaga12, A. Bellingeri-Laurikainen39, R. Bellwied47, J. Berger14, B. I. Bezverkhny49, S. Bharadwaj34, A. Bhasin19, A. K. Bhati29, V. S. Bhatia29, H. Bichsel46, J. Bielcik49, J. Bielcikova49, A. Billmeier47, L. C. Bland4, C. O. Blyth3, S.-L. Blyth21, B. E. Bonner35, M. Botje27, A. Boucham39, J. Bouchet39, A. V. Brandin25, A. Bravar4, M. Bystersky11, R. V. Cadman1, X. Z. Cai38, H. Caines49, M. Calderón de la Barca Sánchez17, J. Castillo21, O. Catu49, D. Cebra7, Z. Chajecki28, P. Chaloupka11, S. Chattopadhyay44, H. F. Chen37, J. H. Chen38, Y. Chen8, J. Cheng42, M. Cherney10, A. Chikanian49, H. A. Choi33, W. Christie4, J. P. Coffin18, T. M. Cormier47, M. R. Cosentino36, J. G. Cramer46, H. J. Crawford6, D. Das44, S. Das44, M. Daugherity41, M. M. de Moura36, T. G. Dedovich12, M. DePhillips4, A. A. Derevschikov31, L. Didenko4, T. Dietel14, S. M. Dogra19, W. J. Dong8, X. Dong37, J. E. Draper7, F. Du49, A. K. Dubey15, V. B. Dunin12, J. C. Dunlop4, M. R. Dutta Mazumdar44, V. Eckardt23, W. R. Edwards21, L. G. Efimov12, V. Emelianov25, J. Engelage6, G. Eppley35, B. Erazmus39, M. Estienne39, P. Fachini4, J. Faivre18, R. Fatemi22, J. Fedorisin12, K. Filimonov21, P. Filip11, E. Finch49, V. Fine4, Y. Fisyak4, K. S. F. Fornazier36, J. Fu42, C. A. Gagliardi40, L. Gaillard3, J. Gans49, M. S. Ganti44, F. Geurts35, V. Ghazikhanian8, P. Ghosh44, J. E. Gonzalez8, H. Gos45, O. Grachov47, O. Grebenyuk27, D. Grosnick43, S. M. Guertin8, Y. Guo47, A. Gupta19, N. Gupta19, T. D. Gutierrez7, T. J. Hallman4, A. Hamed47, D. Hardtke21, J. W. Harris49, M. Heinz2, T. W. Henry40, S. Hepplemann30, B. Hippolyte18, A. Hirsch32, E. Hjort21, G. W. Hoffmann41, M. J. Horner21, H. Z. Huang8, S. L. Huang37, E. W. Hughes5, T. J. Humanic28, G. Igo8, A. Ishihara41, P. Jacobs21, W. W. Jacobs17, M. Jedynak45, H. Jiang8, P. G. Jones3, E. G. Judd6, S. Kabana2, K. Kang42, M. Kaplan9, D. Keane20, A. Kechechyan12, V. Yu. Khodyrev31, B. C. Kim33, J. Kiryluk22, A. Kisiel45, E. M. Kislov12, J. Klay21, S. R. Klein21, D. D. Koetke43, T. Kollegger14, M. Kopytine20, L. Kotchenda25, K. L. Kowalik21, M. Kramer26, P. Kravtsov25, V. I. Kravtsov31, K. Krueger1, C. Kuhn18, A. I. Kulikov12, A. Kumar29, R. Kh. Kutuev13, A. A. Kuznetsov12, M. A. C. Lamont49, J. M. Landgraf4, S. Lange14, F. Laue4, J. Lauret4, A. Lebedev4, R. Lednicky12, C.-H. Lee33, S. Lehocka12, M. J. LeVine4, C. Li37, Q. Li47, Y. Li42, G. Lin49, S. J. Lindenbaum26, M. A. Lisa28, F. Liu48, H. Liu37, J. Liu35, L. Liu48, Q. J. Liu46, Z. Liu48, T. Ljubicic4, W. J. Llope35, H. Long8, R. S. Longacre4, M. Lopez-Noriega28, W. A. Love4, Y. Lu48, T. Ludlam4, D. Lynn4, G. L. Ma38, J. G. Ma8, Y. G. Ma38, D. Magestro28, S. Mahajan19, D. P. Mahapatra15, R. Majka49, L. K. Mangotra19, R. Manweiler43, S. Margetis20, C. Markert20, L. Martin39, J. N. Marx21, H. S. Matis21, Yu. A. Matulenko31, C. J. McClain1, T. S. McShane10, F. Meissner21, Yu. Melnick31, A. Meschanin31, M. L. Miller22, N. G. Minaev31, C. Mironov20, A. Mischke27, D. K. Mishra15, J. Mitchell35, B. Mohanty44, L. Molnar32, C. F. Moore41, D. A. Morozov31, M. G. Munhoz36, B. K. Nandi44, S. K. Nayak19, T. K. Nayak44, J. M. Nelson3, P. K. Netrakanti44, V. A. Nikitin13, L. V. Nogach31, S. B. Nurushev31, G. Odyniec21, A. Ogawa4, V. Okorokov25, M. Oldenburg21, D. Olson21, S. K. Pal44, Y. Panebratsev12, S. Y. Panitkin4, A. I. Pavlinov47, T. Pawlak45, T. Peitzmann27, V. Perevoztchikov4, C. Perkins6, W. Peryt45, V. A. Petrov47, S. C. Phatak15, R. Picha7, M. Planinic50, J. Pluta45, N. Porile32, J. Porter46, A. M. Poskanzer21, M. Potekhin4, E. Potrebenikova12, B. V. K. S. Potukuchi19, D. Prindle46, C. Pruneau47, J. Putschke21, G. Rakness30, R. Raniwala34, S. Raniwala34, O. Ravel39, R. L. Ray41, S. V. Razin12, D. Reichhold32, J. G. Reid46, J. Reinnarth39, G. Renault39, F. Retiere21, A. Ridiger25, H. G. Ritter21, J. B. Roberts35, O. V. Rogachevskiy12, J. L. Romero7, A. Rose21, C. Roy39, L. Ruan37, M. J. Russcher27, R. Sahoo15, I. Sakrejda21, S. Salur49, J. Sandweiss49, M. Sarsour40, I. Savin13, P. S. Sazhin12, J. Schambach41, R. P. Scharenberg32, N. Schmitz23, K. Schweda21, J. Seger10, I. Selyuzhenkov47, P. Seyboth23, E. Shahaliev12, M. Shao37, W. Shao5, M. Sharma29, W. Q. Shen38, K. E. Shestermanov31, S. S. Shimanskiy12, E. Sichtermann21, F. Simon22, R. N. Singaraju44, N. Smirnov49, R. Snellings27, G. Sood43, P. Sorensen21, J. Sowinski17, J. Speltz18, H. M. Spinka1, B. Srivastava32, A. Stadnik12, T. D. S. Stanislaus43, R. Stock14, A. Stolpovsky47, M. Strikhanov25, B. Stringfellow32, A. A. P. Suaide36, E. Sugarbaker28, M. Sumbera11, B. Surrow22, M. Swanger10, T. J. M. Symons21, A. Szanto de Toledo36, A. Tai8, J. Takahashi36, A. H. Tang27, T. Tarnowsky32, D. Thein8, J. H. Thomas21, A. R. Timmins3, S. Timoshenko25, M. Tokarev12, S. Trentalange8, R. E. Tribble40, O. D. Tsai8, J. Ulery32, T. Ullrich4, D. G. Underwood1, G. Van Buren4, N. van der Kolk27, M. van Leeuwen21, A. M. Vander Molen24, R. Varma16, I. M. Vasilevski13, A. N. Vasiliev31, R. Vernet18, S. E. Vigdor17, Y. P. Viyogi44, S. Vokal12, S. A. Voloshin47, W. T. Waggoner10, F. Wang32, G. Wang20, G. Wang5, X. L. Wang37, Y. Wang41, Y. Wang42, Z. M. Wang37, H. Ward41, J. W. Watson20, J. C. Webb17, G. D. Westfall24, A. Wetzler21, C. Whitten,Jr.8, H. Wieman21, S. W. Wissink17, R. Witt2, J. Wood8, J. Wu37, N. Xu21, Z. Xu4, Z. Z. Xu37, E. Yamamoto21, P. Yepes35, I.-K. Yoo33, V. I. Yurevich12, I. Zborovsky11, H. Zhang4, W. M. Zhang20, Y. Zhang37, Z. P. Zhang37, C. Zhong38, R. Zoulkarneev13, Y. Zoulkarneeva13, A. N. Zubarev12, and J. X. Zuo38 (STAR Collaboration)
1Argonne National Laboratory, Argonne, Illinois 60439, USA
2University of Bern, 3012 Bern, Switzerland
3University of Birmingham, Birmingham, United Kingdom
4Brookhaven National Laboratory, Upton, New York 11973, USA
5California Institute of Technology, Pasadena, California 91125, USA
6University of California, Berkeley, California 94720, USA
7University of California, Davis, California 95616, USA
8University of California, Los Angeles, California 90095, USA
9Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
10Creighton University, Omaha, Nebraska 68178, USA
11Nuclear Physics Institute AS CR, 250 68 Řež/Prague, Czech Republic
12Laboratory for High Energy (JINR), Dubna, Russia
13Particle Physics Laboratory (JINR), Dubna, Russia
14University of Frankfurt, Frankfurt, Germany
15Institute of Physics, Bhubaneswar 751005, India
16Indian Institute of Technology, Mumbai, India
17Indiana University, Bloomington, Indiana 47408, USA
18Institut de Recherches Subatomiques, Strasbourg, France
19University of Jammu, Jammu 180001, India
20Kent State University, Kent, Ohio 44242, USA
21Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
22Massachusetts Institute of Technology, Cambridge, Massachusetts 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
29Panjab University, Chandigarh 160014, India
30Pennsylvania State University, University Park, Pennsylvania 16802, USA
31Institute of High Energy Physics, Protvino, Russia
32Purdue University, West Lafayette, Indiana 47907, USA
33Pusan National University, Pusan, Republic of Korea
34University of Rajasthan, Jaipur 302004, India
35Rice University, Houston, Texas 77251, USA
36Universidade de Sao Paulo, Sao Paulo, Brazil
37University of Science & Technology of China, Anhui 230027, China
38Shanghai Institute of Applied Physics, Shanghai 201800, China
39SUBATECH, Nantes, France
40Texas A&M University, College Station, Texas 77843, USA
41University of Texas, Austin, Texas 78712, USA
42Tsinghua University, Beijing 100084, China
43Valparaiso University, Valparaiso, Indiana 46383, USA
44Variable Energy Cyclotron Centre, Kolkata 700064, India
45Warsaw University of Technology, Warsaw, Poland
46University of Washington, Seattle, Washington 98195, USA
47Wayne State University, Detroit, Michigan 48201, USA
48Institute of Particle Physics, CCNU (HZNU), Wuhan 430079, China
49Yale University, New Haven, Connecticut 06520, USA
50University of Zagreb, Zagreb, HR-10002, Croatia
Received 18 October 2005; published 8 March 2006
We present the directed flow (v1) measured in Au+Au collisions at √sNN=62.4 GeV in the midpseudorapidity region |η|<1.3 and in the forward pseudorapidity region 2.5<|η|<4.0. The results are obtained using the three-particle cumulant method, the event plane method with mixed harmonics, and for the first time at the Relativistic Heavy Ion Collider, the standard method with the event plane reconstructed from spectator neutrons. Results from all three methods are in good agreement. Over the pseudorapidity range studied, charged particle directed flow is in the direction opposite to that of fragmentation neutrons.
© 2006 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevC.73.034903
DOI:
10.1103/PhysRevC.73.034903
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