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Differential studies of inclusive J/ψ and ψ(2S) production at forward rapidity in Pb-Pb collisions at √sNN = 2.76 TeV
ALICE Collaboration Adam, J. Adamova, D. Aggarwal, M. M. Aglieri Rinella, G.
ALICE Collaboration
Adam, J.
Adamova, D.
Aggarwal, M. M.
Aglieri Rinella, G.
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Abstract
The production of J/ψ and ψ(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/ψ yields were extracted in different centrality classes and the centrality dependence of the average pt is presented. The J/ψ suppression, quantified with the nuclear modification 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/ψ 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 ψ(2S) suppression are provided via the ratio of ψ(2S) over J/ψ measured in pp and Pb-Pb collisions.
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Date
2016-05-31
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Springer Verlag
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Keywords
Heavy Ion Experiments, Quark gluon plasma
Citation
The ALICE collaboration, Adam, J., Adamová, D. et al. J. High Energ. Phys. (2016) 2016: 179. https://doi.org/10.1007/JHEP05(2016)179