Charmonium production at mid-rapidity in Pb-Pb and p-Pb collisions with ALICE

TL;DR

This paper reports on ALICE measurements of J/ψ production in Pb-Pb and p-Pb collisions at LHC energies, analyzing cold nuclear matter effects and their implications for understanding quarkonium suppression.

Contribution

It provides new experimental data on J/ψ production at mid-rapidity in heavy-ion collisions and discusses cold nuclear matter effects using p-Pb data to interpret Pb-Pb results.

Findings

Cold nuclear matter effects influence J/ψ production.

Comparison of data to models helps interpret suppression.

Results contribute to understanding quark-gluon plasma.

Abstract

We present an overview of the ALICE measurements on the production of $\mathrm{J/}\psi$ in Pb-Pb collisions at a centre-of-mass energy per nucleon pair of $\sqrt{s_\mathrm{NN}} = 2.76\,\mathrm{TeV}$ and p-Pb collisions at $\sqrt{s_\mathrm{NN}}= 5.02\,\mathrm{TeV}$ at mid-rapidity ($|y_\mathrm{lab} | < 0.8$) down to zero transverse momentum. The cold nuclear matter effects estimated from the p-Pb measurements and their impact on the interpretation of Pb-Pb results are discussed, based on comparison of data to model calculations.