Energy dependence of J/ψ production in Au + Au collisions at sNN=39,62.4 and 200GeV

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The inclusive J/ψ transverse momentum spectra and nuclear modification factors are reported at mid-rapidity (|y|<1.0) in Au + Au collisions at sNN = 39, 62.4 and 200 GeV taken by the STAR experiment. A suppression of J/ψ production, with respect to the production in p+p scaled by the number of binary nucleon–nucleon collisions, is observed in central Au + Au collisions at these three energies. No significant energy dependence of nuclear modification factors is found within uncertainties. The measured nuclear modification factors can be described by model calculations that take into account both suppression of direct J/ψ production due to the color screening effect and J/ψ regeneration from recombination of uncorrelated charm–anticharm quark pairs.

Original languageEnglish
Pages (from-to)13-20
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
StatePublished - Aug 10 2017

Bibliographical note

Funding Information:
We thank the RHIC Operations Group and RCF at BNL, the NERSC Center at LBNL, the KISTI Center in Korea, and the Open Science Grid consortium for providing resources and support. This work was supported in part by the Office of Nuclear Physics within the U.S. DOE Office of Science , the U.S. NSF , the Ministry of Education and Science of the Russian Federation , NSFC , CAS , MoST and MoE of China , the National Research Foundation of Korea , NCKU (Taiwan) , GA and MSMT of the Czech Republic, FIAS of Germany, DAE , DST , and UGC of India, the National Science Centre of Poland , National Research Foundation , the Ministry of Science, Education and Sports of the Republic of Croatia, and RosAtom of Russia.

Publisher Copyright:
© 2017 The Author

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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