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System-Size Independence of Directed Flow Measured at the BNL Relativistic Heavy-Ion Collider

Abelev, B. I. and Aggarwal, M. M. and Ahammed, Z. and Anderson, B. D. and Arkhipkin, D. and Averichev, G. S. and Bai, Y. and Balewski, J. and Barannikova, O. and Barnby, L. S. and Baudot, J. and Baumgart, S. and Beavis, D. R. and Bellwied, R. and Benedosso, F. and Betts, R. R. and Bhardwaj, S. and Bhasin, A. and Bhati, A. K. and Bichsel, H. and Bielcik, J. and Bielcikova, J. and Biritz, B. and Bland, L. C. and Bombara, M. and Bonner, B. E. and Botje, M. and Bouchet, J. and Braidot, E. and Brandin, A. V. and Bueltmann, S. and Burton, T. P. and Bystersky, M. and Cai, X. Z. and Caines, H. and Calderón de la Barca Sánchez, M. and Callner, J. and Catu, O. and Cebra, D. and Cendejas, R. and Cervantes, M. C. and Chajecki, Z. and Chaloupka, P. and Chattopadhyay, S. and Chen, H. F. and Chen, J. H. and Chen, J. Y. and Cheng, J. and Cherney, M. and Chikanian, A. and Choi, K. E. and Christie, W. and Chung, S. U. and Clarke, R. F. and Codrington, M. J. M. and Coffin, J. P. and Cormier, T. M. and Cosentino, M. R. and Cramer, J. G. and Crawford, H. J. and Das, D. and Dash, S. and Daugherity, M. and de Moura, M. M. and Dedovich, T. G. and DePhillips, M. and Derevschikov, A. A. and Derradi de Souza, R. and Didenko, L. and Dietel, T. and Djawotho, P. and Dogra, S. M. and Dong, X. and Drachenberg, J. L. and Draper, J. E. and Du, F. and Dunlop, J. C. and Dutta Mazumdar, M. R. and Edwards, W. R. and Efimov, L. G. and Elhalhuli, E. and Elnimr, M. and Emelianov, V. and Engelage, J. and Eppley, G. and Erazmus, B. and Estienne, M. and Eun, L. and Fachini, P. and Fatemi, R. and Fedorisin, J. and Feng, A. and Filip, P. and Finch, E. and Fine, V. and Fisyak, Y. and Gagliardi, C. A. and Gaillard, L. and Gangadharan, D. R. and Ganti, M. S. and Garcia-Solis, E. and Ghazikhanian, V. and Ghosh, P. and Gorbunov, Y. N. and Gordon, A. and Grebenyuk, O. and Grosnick, D. and Grube, B. and Guertin, S. M. and Guimaraes, K. S. F. F. and Gupta, A. and Gupta, N. and Guryn, W. and Haag, B. and Hallman, T. J. and Hamed, A. and Harris, J. W. and He, W. and Heinz, M. and Heppelmann, S. and Hippolyte, B. and Hirsch, A. and Hoffman, A. M. and Hoffmann, G. W. and Hofman, D. J. and Hollis, R. S. and Huang, H. Z. and Hughes, E. W. and Humanic, T. J. and Igo, G. and Iordanova, A. and Jacobs, P. and Jacobs, W. W. and Jakl, P. and Jin, F. and Jones, P. G. and Judd, E. G. and Kabana, S. and Kajimoto, K. and Kang, K. and Kapitan, J. and Kaplan, M. and Keane, D. and Kechechyan, A. and Kettler, D. and Khodyrev, V. Yu. and Kiryluk, J. and Kisiel, A. and Klein, S. R. and Knospe, A. G. and Kocoloski, A. and Koetke, D. D. and Kollegger, T. and Kopytine, M. and Kotchenda, L. and Kouchpil, V. and Kravtsov, P. and Kravtsov, V. I. and Krueger, K. and Kuhn, C. and Kumar, A. and Kumar, L. and Kurnadi, P. and Lamont, M. A. C. and Landgraf, J. 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K. and Panebratsev, Y. and Pawlak, T. and Peitzmann, T. and Perevoztchikov, V. and Perkins, C. and Peryt, W. and Phatak, S. C. and Planinic, M. and Pluta, J. and Poljak, N. and Porile, N. and Poskanzer, A. M. and Potekhin, M. and Potukuchi, B. V. K. S. and Prindle, D. and Pruneau, C. and Pruthi, N. K. and Putschke, J. and Qattan, I. A. and Raniwala, R. and Raniwala, S. and Ray, R. L. and Ridiger, A. and Ritter, H. G. and Roberts, J. B. and Rogachevskiy, O. V. and Romero, J. L. and Rose, A. and Roy, C. and Ruan, L. and Russcher, M. J. and Rykov, V. and Sahoo, R. and Sakrejda, I. and Sakuma, T. and Salur, S. and Sandweiss, J. and Sarsour, M. and Schambach, J. and Scharenberg, R. P. and Schmitz, N. and Seger, J. and Selyuzhenkov, I. and Seyboth, P. and Shabetai, A. and Shahaliev, E. and Shao, M. and Sharma, M. and Shi, S. S. and Shi, X.-H. and Sichtermann, E. P. and Simon, F. and Singaraju, R. N. and Skoby, M. J. and Smirnov, N. and Snellings, R. and Sorensen, P. and Sowinski, J. and Spinka, H. M. and Srivastava, B. and Stadnik, A. and Stanislaus, T. D. S. and Staszak, D. and Stock, R. and Strikhanov, M. and Stringfellow, B. and Suaide, A. A. P. and Suarez, M. C. and Subba, N. L. and Sumbera, M. and Sun, X. M. and Sun, Y. and Sun, Z. and Surrow, B. and Symons, T. J. M. and Szanto de Toledo, A. and Takahashi, J. and Tang, A. H. and Tang, Z. and Tarnowsky, T. and Thein, D. and Thomas, J. H. and Tian, J. and Timmins, A. R. and Timoshenko, S. and Tokarev, M. and Trainor, T. A. and Tram, V. N. and Trattner, A. L. and Trentalange, S. and Tribble, R. E. and Tsai, O. D. and Ulery, J. and Ullrich, T. and Underwood, D. G. and Van Buren, G. and van der Kolk, N. and van Leeuwen, M. and Vander Molen, A. M. and Varma, R. and Vasconcelos, G. M. S. and Vasilevski, I. M. and Vasiliev, A. N. and Videbaek, F. and Vigdor, S. E. and Viyogi, Y. P. and Vokal, S. and Voloshin, S. A. and Wada, M. and Waggoner, W. T. and Wang, F. and Wang, G. and Wang, J. S. and Wang, Q. and Wang, X. and Wang, X. L. and Wang, Y. and Webb, J. C. and Westfall, G. D. and Whitten, C., Jr. and Wieman, H. and Wissink, S. W. and Witt, R. and Wu, J. and Wu, Y. and Xu, N. and Xu, Q. H. and Xu, Y. and Xu, Z. and Yang, Y. Y. and Yepes, P. and Yoo, I-K. and Yue, Q. and Zawisza, M. and Zbroszczyk, H. and Zhan, W. and Zhang, H. and Zhang, S. and Zhang, W. M. and Zhang, Y. and Zhang, Z. P. and Zhao, Y. and Zhong, C. and Zhou, J. and Zoulkarneev, R. and Zoulkarneeva, Y. and Zuo, J. X. (2008) System-Size Independence of Directed Flow Measured at the BNL Relativistic Heavy-Ion Collider. Physical Review Letters, 101 (25). Art. No. 252301. ISSN 0031-9007.

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We measure directed flow (ν_1) for charged particles in Au+Au and Cu+Cu collisions at √S_(NN)=200 and 62.4 GeV, as a function of pseudorapidity (η), transverse momentum (p_t), and collision centrality, based on data from the STAR experiment. We find that the directed flow depends on the incident energy but, contrary to all available model implementations, not on the size of the colliding system at a given centrality. We extend the validity of the limiting fragmentation concept to ν_1 in different collision systems, and investigate possible explanations for the observed sign change in ν_1(p_t).

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Fatemi, R.0000-0001-9081-2608
Harris, J. W.0000-0001-6760-9951
Zhang, Y.0000-0002-9463-3970
Additional Information:© 2008 The American Physical Society. Received 10 July 2008; published 16 December 2008. We thank the RHIC Operations Group and RCF at BNL, and the NERSC Center at LBNL and the resources provided by the Open Science Grid consortium for their support. This work was supported in part by the Offices of NP and HEP within the U.S. DOE Office of Science, the U.S. NSF, the Sloan Foundation, the DFG Excellence Cluster EXC153 of Germany, CNRS/IN2P3, RA, RPL, and EMN of France, STFC and EPSRC of the United Kingdom, FAPESP of Brazil, the Russian Ministry of Science and Technology, the NNSFC, CAS, MoST, and MoE of China, IRP and GA of the Czech Republic, FOM of the Netherlands, DAE, DST, and CSIR of the Government of India, Swiss NSF, the Polish State Committee for Scientific Research, Slovak Research and Development Agency, and the Korea Science and Engineering Foundation. PACS numbers: 25.75.Ld.
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Department of Energy (DOE)UNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
Deutsche Forschungsgemeinschaft (DFG)UNSPECIFIED
Centre National de la Recherche Scientifique (CNRS)UNSPECIFIED
École des Mines de NantesUNSPECIFIED
Science and Technology Facilities Council (STFC)UNSPECIFIED
Engineering and Physical Sciences Research Council (EPSRC)UNSPECIFIED
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)UNSPECIFIED
Ministry of Science and Technology (Russia)UNSPECIFIED
National Natural Science Foundation of ChinaUNSPECIFIED
Chinese Academy of ScienceUNSPECIFIED
Ministry of Science and Technology (Taipei)UNSPECIFIED
Ministry of Education (Taipei)UNSPECIFIED
GA of the Czech RepublicUNSPECIFIED
Stichting voor Fundamenteel Onderzoek der Materie (FOM)UNSPECIFIED
Department of Atomic Energy (India)UNSPECIFIED
Department of Science and Technology (India)UNSPECIFIED
Council of Scientific and Industrial Research (India)UNSPECIFIED
Swiss National Science Foundation (SNSF)UNSPECIFIED
State Committee for Scientific Research (Poland)UNSPECIFIED
Research and Development Agency (Slovakia)UNSPECIFIED
Korea Science and Engineering FoundationUNSPECIFIED
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ID Code:16038
Deposited By: Tony Diaz
Deposited On:25 Sep 2009 16:49
Last Modified:09 Mar 2020 13:19

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