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.
J/ψ Suppression at Forward Rapidity in Pb-Pb Collisions at sqrt[s_{NN}]=2.76 TeV
BEOLE', Stefania;BERZANO, DARIO CARLO DOMENICO;BIANCHI, LIVIO;CORRALES MORALES, YASSER;FERRETTI, Alessandro;GAGLIARDI, Martino;GALLIO, Mauro;INNOCENTI, GIAN MICHELE;MARCHISONE, MASSIMILIANO;MASERA, Massimo;MILANO, LEONARDO;ORTONA, GIACOMO;VERCELLIN, Ermanno;
2012-01-01
Abstract
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 2.5File | Dimensione | Formato | |
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J:psi_suppression_2012_PhysRevLett.109.072301.pdf
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