J/ψ production at high transverse momenta in p+p and Au + Au collisions at sNN=200GeV

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Abstract

We report J/ψ spectra for transverse momenta pT>5GeV/c at mid-rapidity in p+p and Au+Au collisions at sNN=200GeV. The inclusive J/ψ spectrum and the extracted B-hadron feed-down are compared to models incorporating different production mechanisms. We observe significant suppression of the J/ψ yields for pT>5GeV/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-pT π± and low-pT J/ψ at RHIC and high-pT J/ψ at the LHC.

Original languageEnglish
Pages (from-to)55-62
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume722
Issue number1-3
DOIs
StatePublished - May 13 2013

Bibliographical note

Funding Information:
We thank the RHIC Operations Group and RCF at BNL , the NERSC Center at LBNL and the Open Science Grid consortium for providing resources and support. This work was supported in part by the Offices of NP and HEP within the US DOE Office of Science , the US NSF , the Sloan Foundation , the 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 , and MoE of China , GA and MSMT of the Czech Republic , FOM and NWO of the Netherlands , DAE , DST , and 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 , and RosAtom of Russia .

Keywords

  • Color-screening
  • Heavy-ion collisions
  • J/ψ suppression
  • Quarkonium
  • STAR

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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