Centrality, rapidity and transverse momentum dependence of J/ψ suppression in Pb–Pb collisions at √sNN = 2.76 TeV (CROSBI ID 213468)
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Abedev, B. ... ; Antičić, Tome ; ... ; Gotovac, Sven ; ... ; Mudnić, Eugen ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Simatović, Goran ; ... ; Šuša, Tatjana ; ... ; Vicković, Linda ; ... ; Zyzak, Y.
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Centrality, rapidity and transverse momentum dependence of J/ψ suppression in Pb–Pb collisions at √sNN = 2.76 TeV
The inclusive J/ψ nuclear modification factor (RAA) in Pb–Pb collisions at √sNN = 2.76 TeV has been measured by ALICE as a function of centrality in the e+e− decay channel at mid-rapidity (|y| < 0.8) and as a function of centrality, transverse momentum and rapidity in the μ+μ− decay channel at forward-rapidity (2.5 < y < 4). The J/ψ yields measured in Pb–Pb are suppressed compared to those in pp collisions scaled by the number of binary collisions. The RAA integrated over a centrality range corresponding to 90% of the inelastic Pb–Pb cross section is 0.72±0.06(stat.)±0.10(syst.) at mid- rapidity and 0.58 ± 0.01(stat.) ± 0.09(syst.) at forward- rapidity. At low transverse momentum, significantly larger values of RAA are measured at forward-rapidity compared to measurements at lower energy. These features suggest that a contribution to the J/ψ yield originates from charm quark (re)combination in the deconfined partonic medium.
Relativistic heavy ion collisions; Quark gluon plasma; Quarkonium; J/ψ suppression; Experimental results
The Alice Collaboration.
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