Differential studies of inclusive J/ψ and ψ(2S) production at forward rapidity in Pb-Pb collisions at √sNN = 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; Røed, Ketil; Skaali, Toralf Bernhard; Tveter, Trine Spedstad; Wikne, Jon Christopher; Zhao, Chengxin; Langøy, Rune; Lien, Jørgen; Akindinov, Alexander; Alam, Sk Noor; De Albuquerque, Danilo Silva; Aleksandrov, Dimitry; Alessandro, Bruno; Alexandre, Didier; ALICE, Collaboration
Journal article, Peer reviewed
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Original versionJ. High Energ. Phys. (2016) 2016: 179 10.1007/JHEP05(2016)179
The production of J/ and (2S) was studied 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 (pt) in the dimuon decay channel. Inclusive J/ yields were extracted in di erent centrality classes and the centrality dependence of the average pt is presented. The J/ suppression, quanti ed with the nuclear modi cation factor (RAA), was measured as a function of centrality, transverse momentum and rapidity. Comparisons with similar measurements at lower collision energy and theoretical models indicate that the J/ production is the result of an interplay between color screening and recombination mechanisms in a decon ned partonic medium, or at its hadronization. Results on the (2S) suppression are provided via the ratio of (2S) over J/ measured in pp and Pb-Pb collisions.