Measurements of J/ψ yields at forward and mid-rapidity in d+Au, Cu+Cu and Au+Au collisions at √s_NN = 200 GeV by PHENIX at RHIC

2006/06/13 by V-N. Tram, Tram, VN
Physics and Astronomy · #FOS: Physical sciences #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex)

paper · doi:10.48550/arxiv.nucl-ex/0606017

openalex publication_date 2006/06/13 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28

Abstract

The J/ψ yields in heavy ion collisions are expected to be a promising probe of deconfined matter, since theoretical models predict that the J/ψ production could be strongly suppressed due to color screening effect in a Quark Gluon Plasma. In addition, one of the interesting predictions that has emerged recently is the J/ψ enhancement at RHIC energy via competing mechanisms such as recombination. The PHENIX collaboration has measured J/ψ production via its decay into lepton pairs in Au+Au and Cu+Cu collisions at √s_NN = 200 GeV. The nuclear modification factor R_{\rm AA} for the \rm J/ψ is obtained by comparing Au+Au or Cu+Cu collisions to p+p collisions. The R_{\rm AA} dependences on centrality, transverse momentum and rapidity are presented both at forward rapidity (1.2

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