期刊
PHYSICS LETTERS B
卷 722, 期 1-3, 页码 55-62出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2013.04.010
关键词
J/psi suppression; Color-screening; Quarkonium; Heavy-ion collisions; STAR
资金
- 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
- Sloan Foundation
- DFG cluster of excellence 'Origin and Structure of the Universe' of Germany
- CNRS/IN2P3
- FAPESP CNPq of Brazil
- Ministry of Ed. and Sci. of the Russian Federation
- NNSFC
- CAS
- MoST
- MoE of China
- GA
- MSMT of the Czech Republic
- FOM
- NWO of the Netherlands
- DAE
- DST
- CSIR of India
- Polish Ministry of Sci. and Higher Ed.
- Korea National Research Foundation
- Ministry of Sci., Ed. and Sports of the Rep. of Croatia
- RosAtom of Russia
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.
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