Nuclear matter effects on $J/\psi$ production in asymmetric Cu+Au collisions at $\sqrt{s_{{}_{NN}}}$ = 200 GeV

Abstract

We report on $J/\psi$ production from asymmetric Cu+Au heavy-ion collisions at $\sqrt{s_{{}_{NN}}}$=200 GeV at the Relativistic Heavy Ion Collider at both forward (Cu-going direction) and backward (Au-going direction) rapidities. The nuclear modification of $J/\psi$ 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, $J/\psi$ 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. The relative suppression is opposite to that expected from hot nuclear matter dissociation, since a higher energy density is expected in the Au-going direction.

349 authors, 10 pages, 4 figures, and 4 tables. Submitted to Phys. Rev. C. For v2, fixed LaTeX error in 3rd-to-last sentence. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html

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Cited by in corpus (9)

• The ALICE experiment: a journey through QCD
• An experimental review of open heavy flavor and quarkonium production at RHIC
• Quarkonium propagation in the quark gluon plasma
• $\varphi$ meson production in the forward/backward rapidity region in Cu$+$Au collisions at $\sqrt{s_{NN}}=200$ GeV
• Forward $J/\psi$ production in U$+$U collisions at $\sqrt{s_{NN}}$=193 GeV
• B-meson production at forward and backward rapidity in $p$+$p$ and Cu+Au collisions at $\sqrt{s_{{}_{NN}}}$=200 GeV
• $\varphi$-meson production at forward/backward rapidity in high-energy nuclear collisions from a multiphase transport model
• Study of Charmonium Production in Asymmetric Nuclear Collisions by the PHENIX Experiment at RHIC
• Recent Quarkonia Studies from the PHENIX Experiment