Beam-energy and system-size dependence of dynamical net charge fluctuations
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
18/04/2012
18/04/2012
2009
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Resumo |
We present measurements of net charge fluctuations in Au+Au collisions at s(NN)=19.6, 62.4, 130, and 200 GeV, Cu+Cu collisions at s(NN)=62.4 and 200 GeV, and p+p collisions at s=200 GeV using the dynamical net charge fluctuations measure nu(+-,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/N(ch) scaling but display approximate 1/N(part) 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. RHIC Operations Group RCF at BNL NERSC Center at LBNL U.S. Department of Energy (DOE), Offices of NP and HEP US DOE Office of Science US 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 & Engineering Foundation (KOSEF) |
Identificador |
PHYSICAL REVIEW C, NEW YORK, v.79, n.2, 2009 0556-2813 http://producao.usp.br/handle/BDPI/15009 10.1103/PhysRevC.79.024906 |
Idioma(s) |
eng |
Publicador |
AMER PHYSICAL SOC NEW YORK |
Relação |
Physical Review C |
Direitos |
restrictedAccess Copyright AMER PHYSICAL SOC |
Palavras-Chave | #MEAN TRANSVERSE-MOMENTUM #BY-EVENT FLUCTUATIONS #HEAVY-ION COLLISIONS #QUARK-GLUON PLASMA #NUCLEAR COLLISIONS #AU COLLISIONS #MULTIPLICITY #SIGNAL #GEV/C #Physics, Nuclear |
Tipo |
article original article publishedVersion |