Charmonium production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=$ 2.76 and 5.02 TeV with ALICE

Abstract

The production of charmonium states, J/$\psi$ and $\psi$(2S), in heavy-ion collisions, is an important probe to investigate the formation of a plasma of quarks and gluons (QGP). In a hot and deconfined medium, quarkonium production is, indeed, expected to be significantly modified, with respect to the pp yields, due to a balance of color screening and charm-quark recombination mechanisms. The ALICE Collaboration at the LHC has measured charmonium production in Pb-Pb collisions at ${\sqrt{s}}_{\mathrm{NN}}=$ 2.76 and 5.02 TeV. The nuclear modification factor of inclusive J/$\psi$, evaluated at forward ($-4<\eta <-2.5$) rapidity, is measured as a function of the centrality of the collision and of the J/$\psi$ kinematic variables as transverse momentum and rapidity. In this article, we report on the new J/$\psi$ results, obtained at forward rapidity, at ${\sqrt{s}}_{\mathrm{NN}}=5.02$ TeV. These new results are compared to the J/$\psi$ nuclear modification factor obtained at ${\sqrt{s}}_{\mathrm{NN}}=$ 2.76 TeV and to the available theoretical predictions.

4 pages, 4 figures, Strangeness in Quark Matter 2016, UC Berkeley, United States, 27 June-1 July, 2016

References in corpus (6)

• Sequential Regeneration of Charmonia in Heavy-Ion Collisions
• J/$\psi$ suppression at forward rapidity in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Measurement of an excess in the yield of J/$\psi$ at very low $p_{\mathrm{T}}$ in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Differential studies of inclusive J/$\psi$ and $\psi$(2S) production at forward rapidity in Pb-Pb collisions at $\sqrt{{\text{s}}_{{}_{\mathbf{NN}}}}$ = 2.76 TeV
• Rapidity and transverse-momentum dependence of the inclusive J/$\psi$ nuclear modification factor in p-Pb collisions at $\sqrt{{\text{s}}_{\mathbf{NN}}}=5.02$ TeV
• Centrality dependence of inclusive J/$\psi$ production in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV

Cited by in corpus (1)

• Thermal Production of Charmonia at the LHC Energies