Differential studies of inclusive J/$\psi$ and $\psi$(2S) production at forward rapidity in Pb-Pb collisions at $\mathbf{\sqrt{{\textit s}_{_{NN}}}}$ = 2.76 TeV

Abstract : The production of J/$\psi$ and $\psi(2S)$ was measured with the ALICE detector in Pb-Pb collisions at the LHC. The measurement was performed at forward rapidity ($2.5 < y < 4 $) down to zero transverse momentum ($p_{\rm T}$) in the dimuon decay channel. Inclusive J/$\psi$ yields were extracted in different centrality classes and the centrality dependence of the average $p_{\rm T}$ is presented. The J/$\psi$ suppression, quantified with the nuclear modification factor ($R_{\rm AA}$), was studied as a function of centrality, transverse momentum and rapidity. Comparisons with similar measurements at lower collision energy and theoretical models indicate that the J/$\psi$ production is the result of an interplay between color screening and recombination mechanisms in a deconfined partonic medium, or at its hadronization. Results on the $\psi(2S)$ suppression are provided via the ratio of $\psi(2S)$ over J/$\psi$ measured in pp and Pb-Pb collisions.
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Article dans une revue
Journal of High Energy Physics, Springer Verlag (Germany), 2016, 05(2016), pp.179
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Soumis le : mardi 30 juin 2015 - 08:36:22
Dernière modification le : mardi 19 juin 2018 - 01:19:06

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  • HAL Id : in2p3-01169681, version 1
  • ARXIV : 1506.08804

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J. Adam, L. Aphecetche, B. Audurier, A. Baldisseri, Guillaume Batigne, et al.. Differential studies of inclusive J/$\psi$ and $\psi$(2S) production at forward rapidity in Pb-Pb collisions at $\mathbf{\sqrt{{\textit s}_{_{NN}}}}$ = 2.76 TeV. Journal of High Energy Physics, Springer Verlag (Germany), 2016, 05(2016), pp.179. 〈in2p3-01169681〉

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