$J/\psi$ Production in Pb-Pb collisions at $\sqrt{s_{NN}}=$2.76 TeV

TL;DR

This paper presents measurements of $J/\psi$ production in lead-lead collisions at 2.76 TeV, analyzing how the production rate varies with collision centrality, momentum, and rapidity, and comparing results with lower energy data and theoretical models.

Contribution

It provides new experimental data on $J/\psi$ suppression at LHC energies and compares these results with existing models and lower energy measurements.

Findings

$J/\psi$ suppression varies with collision centrality.

Results show differences from lower energy measurements.

Data are consistent with certain theoretical models.

Abstract

We report on the $J/\psi$ production in Pb-Pb collisions at $\sqrt{s_{NN}}=$2.76 TeV recorded with ALICE during the 2010 and 2011 LHC runs. The $J/\psi$ candidates are reconstructed using the $e^{+}e^{-}$ and $\mu^{+}\mu^{-}$ decay channels at mid- and forward rapidity, respectively. We show the $J/\psi$ nuclear modification factor $R_{AA}$ as a function of centrality, transverse momentum and rapidity. Our results are compared to the lower energy measurements from PHENIX and to model calculations.