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The ALICE experiment has measured the inclusive J/ψ production in Pb-Pb collisions at √sNN = 2.76 TeV down to zero transverse momentum in the rapidity range 2.5<y<4. A suppression of the inclusive J/ψ yield in Pb-Pb is observed with respect to the one measured in pp collisions scaled by the number of binary nucleon-nucleon collisions. The nuclear modification factor, integrated over the 0%–80% most central collisions, is 0.545±0.032(stat)±0.083(syst) and does not exhibit a significant dependence on the collision centrality. These features appear significantly different from measurements at lower collision energies. Models including J/ψ production from charm quarks in a deconfined partonic phase can describe our data.
Abelev, B., Adam, J., Adamová, D., Adare, A. M., Aggarwal, M. M., Rinella, G. A., ... & Masoodi, A. A. (2012). J/ψ suppression at forward rapidity in Pb-Pb collisions at s NN= 2.76 TeV. Physical review letters, 109(7), 072301.
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