J/psi production at high transverse momenta in p plus p and Au plus Au collisions at root s(NN)=200 GeV

We report J/psi spectra for transverse momenta P-T > 5 GeV/c at mid-rapidity in p + p and Au + Au collisions at root s(NN) = 200 GeV. The inclusive J/psi spectrum and the extracted B-hadron feed-down are compared to models incorporating different production mechanisms. We observe significant suppression of the J/psi yields for p(T) > 5 GeV/c in 0-30% central Au + Au collisions relative to the p + p yield scaled by the number of binary nucleon-nucleon collisions in Au + Au collisions. In 30-60% mid-central collisions, no such suppression is observed. The level of suppression is consistently less than that of high-p(T) pi(+/-) and low-p(T) J/psi at RHIC and high-p(T) J/psi at the LHC. (C) 2013 Elsevier B.V. All rights reserved

J/psi production at high transverse momenta in p plus p and Au plus Au collisions at root s(NN)=200 GeV

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)We report J/psi spectra for transverse momenta P-T > 5 GeV/c at mid-rapidity in p + p and Au + Au collisions at root s(NN) = 200 GeV. The inclusive J/psi spectrum and the extracted B-hadron feed-down are compared to models incorporating different production mechanisms. We observe significant suppression of the J/psi yields for p(T) > 5 GeV/c in 0-30% central Au + Au collisions relative to the p + p yield scaled by the number of binary nucleon-nucleon collisions in Au + Au collisions. In 30-60% mid-central collisions, no such suppression is observed. The level of suppression is consistently less than that of high-p(T) pi(+/-) and low-p(T) J/psi at RHIC and high-p(T) J/psi at the LHC. (C) 2013 Elsevier B.V. All rights reserved.722416995562RHIC Operations Group and RCF at BNLNERSC Center at LBNLOpen Science Grid consortiumOffices of NP and HEP within the US DOE Office of ScienceUS NSFSloan FoundationDFG cluster of excellence 'Origin and Structure of the Universe' of GermanyCNRS/IN2P3Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Ministry of Ed. and Sci. of the Russian FederationNNSFCCASMoSTMoE of ChinaGAMSMT of the Czech RepublicFOMNWO of the NetherlandsDAEDSTCSIR of IndiaPolish Ministry of Sci. and Higher Ed.Korea National Research FoundationMinistry of Sci., Ed. and Sports of the Rep. of CroatiaRosAtom of RussiaFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq