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
Adam, Jaroslav; Adamová, Dagmar; Aggarwal, Madan M.; Agnello, Michelangelo; Agrawal, Nikita; Ahammed, Zubayer; Ahmad, Shafiq F.; Ahn, Sang Un; Aimo, Ilaria; Aiola, Salvatore; Alme, Johan; Helstrup, Håvard; Hetland, Kristin Fanebust; Kileng, Bjarte; Altinpinar, Sedat; Djuvsland, Øystein; Haaland, Øystein Senneset; Huang, Meidana; Lønne, Per-Ivar; Nystrand, Joakim; Rehman, Attiq ur; Røhrich, Dieter; Tambave, Ganesh Jagannath; Ullaland, Kjetil; Velure, Arild; Wagner, Boris; Zhang, Hui; Zhou, Zhuo; Zhu, Hongsheng; Arsene, Ionut Christian; Bätzing, Paul Christoph; Dordic, Olja; Lindal, Svein; Mahmood, Sohail Musa; Milosevic, Jovan; Qvigstad, Henrik; Richter, Matthias Rudolph; Røed, Ketil; Skaali, Toralf Bernhard; Tveter, Trine Spedstad; Wikne, Jon Christopher; Zhao, Chengxin; Langøy, Rune; Lien, Jørgen André; Akindinov, Alexander; Alam, Sk Noor; De Albuquerque, Danilo Silva; Aleksandrov, Dimitry; Alessandro, Bruno; Alexandre, Didier; ALICE, Collaboration
Peer reviewed, Journal article
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Date
2016-05Metadata
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Original version
https://doi.org/10.1007/jhep05(2016)179Abstract
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.