Nuclear matter effects on J/ψ production in asymmetric Cu + Au collisions at sNN=200 GeV

A. Adare et al. (PHENIX Collaboration)
Phys. Rev. C 90, 064908 – Published 18 December 2014

Abstract

We report on J/ψ production from asymmetric Cu + Au heavy-ion collisions at sNN=200 GeV at the Relativistic Heavy Ion Collider at both forward (Cu-going direction) and backward (Au-going direction) rapidities. The nuclear modification of J/ψ yields in Cu + Au collisions in the Au-going direction is found to be comparable to that in Au + Au collisions when plotted as a function of the number of participating nucleons. In the Cu-going direction, J/ψ production shows a stronger suppression. This difference is comparable in magnitude and has the same sign as the difference expected from shadowing effects due to stronger low-x gluon suppression in the larger Au nucleus.

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  • Received 14 April 2014
  • Revised 11 November 2014

DOI:https://doi.org/10.1103/PhysRevC.90.064908

©2014 American Physical Society

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Vol. 90, Iss. 6 — December 2014

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