期刊
PHYSICAL REVIEW C
卷 90, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.90.024906
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资金
- RHIC Operations Group
- RCF at BNL
- NERSC Center at LBNL
- KISTI Center in Korea
- Open Science Grid consortium
- Offices of NP and HEP within the US DOE Office of Science
- US NSF
- CNRS/IN2P3
- FAPESP CNPq of Brazil
- Ministry of Education and Science of the Russian Federation
- NNSFC
- CAS
- MoST
- MoE of China
- Korean Research Foundation
- GA
- MSMT of the Czech Republic
- FIAS of Germany
- DAE
- DST
- CSIR of India
- National Science Centre of Poland
- National Research Foundation [NRF-2012004024]
- Ministry of Science, Education and Sports of the Republic of Croatia
- RosAtom of Russia
- Direct For Mathematical & Physical Scien
- Division Of Physics [1067907] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1352081] Funding Source: National Science Foundation
The J/psi p(T) spectrum and nuclear modification factor (R-AA) are reported for p(T) < 5 GeV/c and vertical bar y vertical bar < 1 from 0% to 60% central Au + Au and Cu + Cu collisions at root s(NN) = 200 GeV at STAR. A significant suppression of p(T) - integrated J/psi production is observed in central Au + Au events. The Cu + Cu data are consistent with no suppression, although the precision is limited by the available statistics. R-AA in Au + Au collisions exhibits a strong suppression at low transverse momentum and gradually increases with p(T). The data are compared to high-p(T) STAR results and previously published BNL Relativistic Heavy Ion Collider results. Comparing with model calculations, it is found that the invariant yields at low p(T) are significantly above hydrodynamic flow predictions but are consistent with models that include color screening and regeneration.
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