J/Psi and Psi(2S) production in Pb-Pb collisions with the ALICE Muon Spectrometer at the LHC

TL;DR

This paper reports on the measurement of J/Psi and Psi(2S) production in lead-lead collisions at the LHC, providing insights into the behavior of charmonium states in a quark-gluon plasma.

Contribution

It presents the first ALICE results on Psi(2S) production and analyzes the centrality and transverse momentum dependence of J/Psi suppression in heavy-ion collisions.

Findings

J/Psi suppression varies with collision centrality and transverse momentum.

First measurements of Psi(2S) production in Pb-Pb collisions at the LHC.

Comparison with theoretical models indicates medium effects on charmonium states.

Abstract

Charmonium states are considered important signatures of the strongly interacting medium created in heavy-ion collisions. In the ALICE experiment, these probes can be investigated in the mu^+mu^- decay channel, in the forward rapidity region (2.5<y<4) down to zero transverse momentum. Results on charmonia production in Pb-Pb collisions at sqrt(s_NN)=2.76 TeV are presented. The centrality and transverse momentum dependence of the inclusive J/Psi nuclear modification factor are shown and compared with theoretical models. Finally, first ALICE results on the Psi(2S) production in Pb-Pb collisions are also discussed.