J/psi production at high transverse momenta in p plus p and Cu plus Cu collisions at root s(NN)=200 GeV
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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| Data(s) |
18/04/2012
18/04/2012
2009
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| Resumo |
The STAR Collaboration at the Relativistic Heavy Ion Collider presents measurements of J/psi e(+) e(-) at midrapidity and high transverse momentum (pT > 5 GeV/c) in p + p and central Cu + Cu collisions at root s(NN) = 200 GeV. The inclusive J/psi production cross section for Cu + Cu collisions is found to be consistent at high p(T) with the binary collision-scaled cross section for p + p collisions. At a confidence level of 97%, this is in contrast to a suppression of J/psi production observed at lower p(T). Azimuthal correlations of J/psi with charged hadrons in p + p collisions provide an estimate of the contribution of B-hadron decays to J/psi production of 13% +/- 5%. Offices of NP within the US DOE Office of Science 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 United Kingdom FAPESP CNPq of Brazil MES Ministry of Education and Science 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 of the Netherlands NOW 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 Science and Higher Education Korea Research Foundation (KRF) Ministry of Science, Education and Sports of the Republic of Croatia MES Russian Ministry of Science and Technology Rosatom of Russia |
| Identificador |
PHYSICAL REVIEW C, v.80, n.4, 2009 0556-2813 http://producao.usp.br/handle/BDPI/16317 10.1103/PhysRevC.80.041902 |
| Idioma(s) |
eng |
| Publicador |
AMER PHYSICAL SOC |
| Relação |
Physical Review C |
| Direitos |
restrictedAccess Copyright AMER PHYSICAL SOC |
| Palavras-Chave | #HEAVY-ION COLLISIONS #INTERSECTING STORAGE-RINGS #QUARK-GLUON PLASMA #ROOT S=1.8 TEV #P(P)OVER-BAR COLLISIONS #NUCLEUS COLLISIONS #D+AU COLLISIONS #AU COLLISIONS #J-PSI #SUPPRESSION #Physics, Nuclear |
| Tipo |
article original article publishedVersion |