Centrality, rapidity and transverse momentum dependence of J/ψ suppression in Pb-Pb collisions at √sNN= 2.76TeV

Abstract

The inclusive [?] nuclear modification factor ([?]) in Pb–Pb collisions at root snn=2.76 TeV has been measured by ALICE as a function of centrality in the e+e- decay channel at mid-rapidity ([?]) and as a function of centrality, transverse momentum and rapidity in the [?] decay channel at forward-rapidity ([?]). The yields measured in Pb–Pb are suppressed compared to those in pp collisions scaled by the number of binary collisions. The [?] integrated over a centrality range corresponding to 90% of the inelastic Pb–Pb cross section is [?] at mid-rapidity and [?] at forward-rapidity. At low transverse momentum, significantly larger values of [?] are measured at forward-rapidity compared to measurements at lower energy. These features suggest that a contribution to the [?] yield originates from charm quark (re)combination in the deconfined partonic medium.