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J/ψ production at low transverse momentum in p+p and d + Au collisions at sNN =200 GeV

  • STAR Collaboration
  • AGH University of Krakow
  • University of Kentucky
  • Joint Institute for Nuclear Research
  • Panjab University
  • Variable Energy Cyclotron Centre India
  • Alikhanov Institute for Theoretical and Experimental Physics
  • Brookhaven National Laboratory
  • Central China Normal University
  • National Institute of Science Education and Research
  • University of Houston
  • University of Jammu
  • University of Texas at Austin
  • Czech Technical University in Prague
  • Czech Academy of Sciences
  • Kent State University
  • Rice University
  • Moscow Engineering Physics Institute
  • Yale University
  • University of California at Davis
  • Ohio State University
  • Texas A&M University
  • Chinese Academy of Sciences
  • CAS - Institute of Modern Physics
  • Tsinghua University
  • Creighton University
  • Lawrence Berkeley National Laboratory
  • University of California at Berkeley
  • Institute of Physics Bhubaneswar
  • Shandong University
  • Institute for High Energy Physics

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

We report on the measurement of J/ψ production in the dielectron channel at midrapidity (|y|<1) in p+p and d+Au collisions at sNN=200GeV from the STAR experiment at the Relativistic Heavy Ion Collider. The transverse momentum pT spectra in p+p for pT<4GeV/c and d+Au collisions for pT<3GeV/c are presented. These measurements extend the STAR coverage for J/ψ production in p+p collisions to low pT. The (pT2) from the measured J/ψ invariant cross section in p+p and d+Au collisions are evaluated and compared to similar measurements at other collision energies. The nuclear modification factor for J/ψ is extracted as a function of pT and collision centrality in d+Au and compared to model calculations using the modified nuclear parton distribution function and a final-state J/ψ nuclear absorption cross section.

Original languageEnglish
Article number064904
JournalPhysical Review C
Volume93
Issue number6
DOIs
StatePublished - Jun 10 2016

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