System size dependence of associated yields in hadron-triggered jets STAR Collaboration
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
20/10/2012
20/10/2012
2010
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Resumo |
We present results on the system size dependence of high transverse momentum di-hadron correlations at root s(NN) = 200 GeV as measured by STAR at RHIC. Measurements in d + Au, Cu + Cu and Au + Au collisions reveal similar jet-like near-side correlation yields (correlations at small angular separation Delta phi similar to 0, Delta eta similar to 0) for all systems and centralities. Previous measurements have shown Chat the away-side (Delta phi similar to pi) yield is suppressed in heavy-ion collisions. We present measurements of the away-side Suppression as a function of transverse momentum and centrality in Cu + Cu and Au + Au collisions. The suppression is found to be similar in Cu + Cu and An + An collisions at a similar number of participants. The results are compared to theoretical calculations based on the patron quenching model and the modified fragmentation model. The observed differences between data and theory indicate that the correlated yields presented here will further constrain dynamic energy loss models and provide information about the dynamic density profile in heavy-ion collisions. (C) 2009 Elsevier B.V. All rights reserved. Department of Energy (DOE), Office of Nuclear Physics (NP) U.S. Department of Energy (DOE) HEP within the US DOE Office of Science U.S. Department of Energy (DOE) U.S. National Science Foundation (NSF) US NSF Sloan Foundation Sloan Foundation DFG Deutsche Forschungsgemeinschaf (DFG) CNRS/IN2P3 CNRS/IN2P3 RA RA RPL RPL EMN of France EMN of France STFC STFC EPSRC of the United Kingdom EPSRC of the United Kingdom Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) FAPESP of Brazil Russian Ministry of Sci. and Tech. Russian Ministry of Sci. and Tech. Natural Science Foundation of China (NSFC) NNSFC Natural Science Foundation of China CAS of China Chinese Academy of Sciences (CAS) MoST of China MoST of China MoE of China MoE of China IRP IRP GA of the Czech Republic GA of the Czech Republic Foundation for Fundamental Research on Matter (FOM) FOM of the Netherlands DAE Department of Atomic Energy of India (DAE) DST DST India Council for Scientific and Industrial Research (CSIR) CSIR of the Government of India Polish State Committee for Scientific Research Polish State Committee for Scientific Research Korea Sci. & Eng. Foundation Korea Sci. & Eng. Foundation |
Identificador |
PHYSICS LETTERS B, v.683, n.2/Mar, p.123-128, 2010 0370-2693 http://producao.usp.br/handle/BDPI/29485 10.1016/j.physletb.2009.12.020 |
Idioma(s) |
eng |
Publicador |
ELSEVIER SCIENCE BV |
Relação |
Physics Letters B |
Direitos |
restrictedAccess Copyright ELSEVIER SCIENCE BV |
Palavras-Chave | #Parton energy loss #Jet quenching #Di-hadron fragmentation function #Relativistic heavy-ion collisions #RADIATIVE ENERGY-LOSS #COLLISIONS #SUPPRESSION #Physics, Multidisciplinary |
Tipo |
article original article publishedVersion |