J$\psi$ nuclear modification factor at mid-rapidity in Pb-Pb collisions at $\sqrt{s_{NN}}=$2.76 TeV

Abstract

We report on the J$\psi$ nuclear modification factor $R_{\mathrm{AA}}$ at mid-rapidity ($|y|<0.9$) in Pb-Pb collisions at $\sqrt{s_{NN}}=$2.76 TeV measured by ALICE. J$\psi$ candidates are reconstructed using their $e^{+}{e}^{-}$ decay channel. The kinematical coverage extends to zero transverse momentum allowing the measurement of integrated cross sections. We show the centrality dependence of the J$\psi$ $R_{\mathrm{AA}}$ at mid-rapidity compared to the results from PHENIX at mid-rapidity and ALICE results at forward-rapidity. We also discuss comparisons to calculations from theoretical models.

Proceedings for the Quark Matter Conference, Washington, 13-18 August 2012. To be published in Nuclear Physics A

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