2008
article
Mass, quark-number, and sqrt sNN dependence of the second and fourth flow harmonics in ultra-relativistic nucleus-nucleus collisions
B. I. Abelev, J. R. Adams, M. M. Aggarwal, Z. Ahammed, J. Amonett, B.D. Anderson, M. Anderson, D. Arkhipkin, G. S. Averichev, Y. Bai, J. Balewski, O. Barannikova, L. S. Barnby, J. Baudot, S. Bekele, V. V. Belaga, A. Bellingeri-Laurikainen, R. Bellwied, F. Benedosso, S. Bhardwaj, A. Bhasin, A. K. Bhati, H. Bichsel, J. Bielčík, J. Bielčíková, L. C. Bland, S.-L. Blyth, B. E. Bonner, M. Botje, J. Bouchet, A. V. Brandin, A. Bravar, M. Bysterský, R. V. Cadman, X. Z. Cai, H. Caines, M. Calderon De La Barca Sanchez, J. Castillo Castellanos, O. Catu, D. Cebra, Z. Chajęcki, P. Chaloupka, S. Chattopadhyay, H.F. Chen, J.H. Chen, J. Cheng, M. Cherney, A. Chikanian, W. Christie, J. P. Coffin, T. M. Cormier, M. R. Cosentino, J. G. Cramer, H. J. Crawford, D. Das, Sudipta Das, M. Daugherity, M. M. de Moura, Т. Г. Дедович, M. DePhillips, A. A. Derevschikov, L. Didenko, T. Dietel, P. Djawotho, S. Dogra, W.J. Dong, X. Dong, J. E. Draper, F. Du, V.B. Dunin, J. C. Dunlop, M. R. Dutta Mazumdar, V. Eckardt, W.R. Edwards, L. G. Efimov, В. Емелянов, J. Engelage, G. Eppley, B. Erazmus, M. Estienne, P. Fachini, J. Fedorišin, K. Filimonov, P. Filip, E. Finch, V. Fine, Y. Fisyak, J. Fu, C. A. Gagliardi, L. Gaillard, Ganti, V. Ghazikhanian, P. Ghosh, J.S. Gonzalez, Y. G. Gorbunov, H. Gos, O. G. Grebenyuk, D. Grosnick, S. M. Guertin, K. S. F. F. Guimarães, Yun Guo, N. Gupta, T. D. Gutierrez, B. Haag, T. J. Hallman, A. Hamed, J. W. Harris, W. He, M. Heinz, T.W. Henry, S. Hepplemann, B. Hippolyte, A. Hirsch, E. Hjort, A. M. Hoffman, G. W. Hoffmann, M. J. Horner, H. Z. Huang, E. W. Hughes, T. J. Humanic, G. Igo, Peter Martin Jacobs, W. W. Jacobs, P. Jakl, Fei Jia, H Jiang, P. Jones, E. G. Judd, S. Kabana, K. Kang, J. Kapitan, M. Kaplan, D. Keane, A. Kechechyan, V. Yu. Khodyrev, B.C. Kim, J. Kiryluk, A. Kisiel, E. M. Kislov, S. R. Klein, A. Kocoloski, D. D. Koetke, T. Kollegger, M. Kopytin, L. Kotchenda, V. Kouchpil, K. Kowalik, M. Krämer, П. Кравцов, V. I. Kravtsov, K. Krueger, C. Kuhn, A. I. Kulikov, A K Rhine Kumar, А.А. Кузнецов, M.A.C. Lamong, J. M. Landgraf, J. S. Lange, S. LaPointe, F. Laue, J. Lauret, A. Lebedev, R. Lednický, Chang‐Hwan Lee, S. Lehocká, M. J. LeVine, C. Li, Q. Li, Y. Li, G. Lin, Xiaoyan Lin, S. J. Lindenbaum, Lisa Lisa Lisa, f. Liu, H. Liu, J. Liu, L. Liu, Z. Liu, T. Ljubičić, W. J. Llope, H. Long, R.S. Longarche, M. Lopez-Noriega, W. A. Love, Y. Lu, T. Ludlam, D. Lynn, G.L. Ma, Jiangang Ma, Y. G., D. Magestro, D. P. Mahapatra, R. Majka, L. K. Mangotra, R. Manweiler, S. Margetis, C. Markert, L. Martin, H. S. Matis, Yu. A. Matulenko, C. J. McClain, T. S. McShane, Yu. Melnick, A. Meschanin, J. Millane, M.L. Miller, N. G. Minaev, S. Mioduszewski, C. Mironov, A. Mischke, D. K. Mishra, J. T. Mitchell, B. Mohanty, L. Molnár, C. Fred Moore, D. A. Morozov, M. G. Munhoz, B. K. Nandi, C. Nattrass, T.K. Nayak, J. M. Nelson, P.K. Netrakanti, V.A. Nikitin, L. V. Nogach, S. B. Nurushev, G. Odyniec, A. Ogawa, В. А. Окороков, M. Oldenburg, D. Olson, M. Pachr, S. Pal, Y. Panebratsev, S.Y. Panitkin, A.I. Pavlinov, T. Pawlak, T. Peitzmann, V. Perevoztchikov, C. Perkins, W. Peryt, V. Petrov, S. C. Phatak, R. Picha, M. Planinić, J. Pluta, N. Poljak, N. Porile, J. Porter, A. M. Poskanzer, M. Potekhin, E. Potrebenikov, B. V. K. S. Potukuchi, D. Prindle, C. A. Pruneau, J. Putschke, G. Rakness, R. Raniwala, S. Raniwala, R. L. Ray, С.В. Разин, J. Reinnarth, D. Relyea, F. Retière, A. Ridiger, H. G. Ritter, J. B. Roberts, O. V. Rogachevskiy, J. L. Romero, A. Rose, C. Roy, M. J. Russcher, R. Sahoo, T. Sakuma, S. Salur, J. Sandweiss, M. Sarsour, P. S. Sazhin, R. P. Scharenberg, N. Schmitz, K. Schweda, J. Seger, I. Selyuzhenkov, P. Seyboth, Alexandre Shabetai, E. Shahaliev, M. Shao, M. Sharma, W. Q. Shen, S. S. Shimanskiy, E. P. Sichtermann, F. Simon, R. N. Singaraju, N. Smirnov, R. J. M. Snellings, G. Sood, P. Sørensen, J. Sowiński, J. Speltz, H. Spinka, B. Srivastava, A. Stadnik, T. D. S. Stanislaus, R. Stock, A. Stolpovsky, M. Strikhanov, B. Stringfellow, A. A. P. Suaide, E. Sugarbaker, M. Šumbera, Z. Sun, B. Surrow, M. Swager, T. J. M. Symons, A. Szanto de Toledo, A. Tai, J. Takahaski, Z. Tang, T. Tarnowsky, D. Thein, J. H. Thomas, A. R. Timmins, S. Timoshenko, M. Tokarev, T. A. Trainor, S. Trentalange, R. E. Tribble, O. D. Tsai, J. Ulery, T. Ullrich, D. G. Underwood, G. Van Buren, N. van der Kolk, M. van Leeuwen, A. M. Vander Molen, R. Varma, I. M. Vasilevski, A. N. Vasiliev, R. Vernet, S.E. Vigdor, Y. P. Viyogi, S. Vokál, S. A. Voloshin, W. T. Waggoner, F. Wang, G. Wang, J.S. Wang, X.L. Wang, Y. Wang, J. W. Watson, J. C. Webb, G. D. Westfall, A. Wetzler, C. Whitten, H. Wieman, S. W. Wissink, R. Witt, J. Wood, J. Wu, N. Xu, QH Xu, P. Yepes, I.-K. Yoo, V.I. Yurevich, W. Zhan, H. Zhang, W.M. Zhang, Y. Zhang, Z.P. Zhang, Y. Zhao, C. Zhong, R. Zoulkarneev, Y. Zoulkarneeva, A. N. Zubarev, J. X. Zuo
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Le résumé fourni par la source
We present STAR measurements of the azimuthal anisotropy parameter $v_2$ for pions, kaons, protons, $\\Lambda$, $\\bar{\\Lambda}$, $\\Xi+\\bar{\\Xi}$, and $\\Omega + \\bar{\\Omega}$, along with $v_4$ for pions, kaons, protons, and $\\Lambda + \\bar{\\Lambda}$ at mid-rapidity for Au+Au collisions at $\\sqrt{s_{_{NN}}}=62.4$ and 200 GeV. The $v_2(p_T)$ values for all hadron species at 62.4 GeV are similar to those observed in 130 and 200 GeV collisions. For observed kinematic ranges, $v_2$ values at 62.4, 130, and 200 GeV are as little as 10%--15% larger than those in Pb+Pb collisions at $\\sqrt{s_{_{NN}}}=17.3$ GeV. At intermediate transverse momentum ($p_T$ from 1.5--5 GeV/c), the 62.4 GeV $v_2(p_T)$ and $v_4(p_T)$ values are consistent with the quark-number scaling first observed at 200 GeV. A four-particle cumulant analysis is used to assess the non-flow contributions to pions and protons and some indications are found for a smaller non-flow contribution to protons than pions. Baryon $v_2$ is larger than anti-baryon $v_2$ at 62.4 and 200 GeV perhaps indicating either that the initial spatial net-baryon distribution is anisotropic, that the mechanism leading to transport of baryon number from beam- to mid-rapidity enhances $v_2$, or that anti-baryon and baryon annihilation is larger in the in-plane direction.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
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Les sujets associés
High-Energy Particle Collisions ResearchQuantum Chromodynamics and Particle InteractionsParticle physics theoretical and experimental studies