Centrality Dependence of $J/ψ$ Production in Au+Au and Cu+Cu Collisions by the PHENIX Experiment at RHIC

Details Centrality Dependence of $J/ψ$ Production in Au+Au and Cu+Cu Collisions by the PHENIX Experiment at RHIC Centrality Dependence of $J/ψ$ Production in Au+Au and Cu+Cu Collisions by the PHENIX Experiment at RHIC

2007-03-02

arxiv.org/abs/nucl-ex/0703004v1

J.Phys.G34:S749-752,2007

Physics

Nuclear Physics

Nuclear Experiment

4 pages, 3 figures. Parallel talk at The 19th International Conference On Ultra relativistic Nucleus-Nucleus Collisions (Quark

Scientific paper

10.1088/0954-3899/34/8/S88

$J/\psi$ production has been measured in Au+Au and Cu+Cu collisions at $\sqrt{s_{NN}}$ = 200 GeV by the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) during 2004 and 2005, respectively, at mid-rapidity ($|\eta| \le$ 0.35) via $J/\psi$ $\to$ $e^{+}e^{-}$ decay and at forward rapidity (1.2 $\le | \eta | \le$ 2.2) via $J/\psi$ $\to$ $\mu^{+}\mu^{-}$ decay. The nuclear modification factor ($R_{AA}$) of $J/\psi$ is presented as a function of the collision centrality for Au+Au collisions (final results) and Cu+Cu collisions (preliminary results) in both rapidity windows. These results are compared to SPS results at lower energy and to various theoretical calculations.

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