Differential studies of inclusive J/psi and psi (2S) production at forward rapidity in Pb-Pb collisions at root s(NN)=2:76 TeVe
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G. and Zyzak, M. and ALICE Collaboration... Show more Show less
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Abstract
The production of J/psi and psi (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 (p(T)) in the
dimuon decay channel. Inclusive J/psi yields were extracted in different
centrality classes and the centrality dependence of the average p(T) is
presented. The J/psi suppression, quantified with the nuclear
modification factor (R-AA), was measured as a function of centrality,
transveerse 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.... Show more Show less