System-Size Independence of Directed Flow Measured at the BNL Relativistic Heavy-Ion Collider
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
18/04/2012
18/04/2012
2008
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Resumo |
We measure directed flow (v(1)) for charged particles in Au + Au and Cu + Cu collisions at root s(NN) = 200 and 62.4 GeV, as a function of pseudorapidity (eta), 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 v(1) in different collision systems, and investigate possible explanations for the observed sign change in v(1)(p(t)). U.S. Department of Energy (DOE), Offices of NP and HEP U.S. DOE Office of Science U.S. NSF National Science Foundation Sloan Foundation Deutsche Forschungsgemeinschaft - DFG Excellence Cluster EXC153 of Germany Centre National de la Recherche Scientifique - CNRS/IN2P3 RA RPL EMN of France STFC EPSRC of the United Kingdom FAPESP of Brazil MES Russian Ministry of Science and Technology National Natural Science Foundation of China (NNSFC) CAS of China MoST of China MoE of China IRP GACR of the Czech Republic FOM of the Netherlands (DAE) Department of Atomic Energy, India (DST) Department of Science and Technology, India (CSIR) Council of Scientific and Industrial Research - India Swiss NSF Polish State Committee for Scientific Research Slovak Research and Development Agency Korea Science and Engineering Foundation (KOSEF) |
Identificador |
PHYSICAL REVIEW LETTERS, v.101, n.25, 2008 0031-9007 http://producao.usp.br/handle/BDPI/15010 10.1103/PhysRevLett.101.252301 |
Idioma(s) |
eng |
Publicador |
AMER PHYSICAL SOC |
Relação |
Physical Review Letters |
Direitos |
restrictedAccess Copyright AMER PHYSICAL SOC |
Palavras-Chave | #NUCLEUS-NUCLEUS COLLISIONS #TIME PROJECTION CHAMBER #QUARK-GLUON PLASMA #ELLIPTIC FLOW #ANISOTROPIC FLOW #COLLECTIVE FLOW #DEPENDENCE #ENERGY #STAR #COLLABORATION #Physics, Multidisciplinary |
Tipo |
article original article publishedVersion |