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

L. Adamczyk et al. (STAR Collaboration)
Phys. Rev. C 93, 064904 – Published 10 June 2016

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.

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  • Received 5 February 2016
  • Revised 28 April 2016

DOI:https://doi.org/10.1103/PhysRevC.93.064904

©2016 American Physical Society

Physics Subject Headings (PhySH)

Nuclear PhysicsParticles & Fields

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Vol. 93, Iss. 6 — June 2016

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