Azimuthal di-hadron correlations in d plus Au and Au plus Au collisions at root s(NN)=200 GeV measured at the STAR detector
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
18/04/2012
18/04/2012
2010
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Resumo |
Yields, correlation shapes, and mean transverse momenta p(T) of charged particles associated with intermediate-to high-p(T) trigger particles (2.5 < p(T) < 10 GeV/c) in d + Au and Au + Au collisions at root s(NN) = 200 GeV are presented. For associated particles at higher p(T) greater than or similar to 2.5 GeV/c, narrow correlation peaks are seen in d + Au and Au + Au, indicating that the main production mechanism is jet fragmentation. At lower associated particle pT < 2 GeV/c, a large enhancement of the near- (Delta phi similar to 0) and away-side (Delta phi similar to pi) associated yields is found, together with a strong broadening of the away-side azimuthal distributions in Au + Au collisions compared to d + Au measurements, suggesting that other particle production mechanisms play a role. This is further supported by the observed significant softening of the away-side associated particle yield distribution at Delta phi similar to pi in central Au + Au collisions. RHIC Operations Group and RCF at BNL NERSC Center at LBNL Open Science Grid consortium Offices of NP and HEP within the US DOE Office of Science US NSF National Science Foundation Sloan Foundation Deutsche Forschungsgemeinschaft - DFG Centre National de la Recherche Scientifique - CNRS/IN2P3 STFC EPSRC of the UnitedKingdom FAPESP CNPq of Brazil MES Ministry of Ed. and Sci. of the Russian Federation National Natural Science Foundation of China (NNSFC) CAS of China MoST of China MoE of China GACR Grant Agency of the Academy of Sciences of the Czech Republic MSMT of the Czech Republic FOM and NWO of the Netherlands (DAE) Department of Atomic Energy, India (DST) Department of Science and Technology, India (CSIR) Council of Scientific and Industrial Research - India Polish Ministry of Sci. and Higher Ed., Korea Research Foundation (KRF) Ministry of Sci., Ed. and Sports of the Rep. of Croatia MES Russian Ministry of Sci. and Tech RosAtom of Russia |
Identificador |
PHYSICAL REVIEW C, v.82, n.2, 2010 0556-2813 http://producao.usp.br/handle/BDPI/16294 10.1103/PhysRevC.82.024912 |
Idioma(s) |
eng |
Publicador |
AMER PHYSICAL SOC |
Relação |
Physical Review C |
Direitos |
restrictedAccess Copyright AMER PHYSICAL SOC |
Palavras-Chave | #AU+AU COLLISIONS #RADIATION #PLASMA #Physics, Nuclear |
Tipo |
article original article publishedVersion |