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Abelev, B.; Aphecetche, Laurent; Baek, Y.W.; Bastid, N.; Batigne, Guillaume; Bergognon, A.A.E.; Bregant, M.; Cheshkov, C.; Cheynis, B.; Crochet, P.; Delagrange, H.; Ducroux, L.; Dupieux, P.; Erazmus, B.; Germain, Marie; Grossiord, J.-Y.; Guilbaud, Maxime; Hippolyte, B.; Ianigro, J.-C.; Kuhn, C.; Lardeux, A.; Li, S.; Lopez, X.; Manso, F.; Marchisone, M.; Mart'Nez Garcia, G.; Martin Blanco, J.; Mas, A.; Morreale, A.; Pillot, Philippe; Porteboeuf-Houssais, S.; Ronflette, L.; Rosnet, P.; Roy, C.; Sanchez Castro, X.; Schutz, Y.; Shabetai, Alexandre; Stocco, Diego; Tieulent, R.; Uras, A.; Valencia Palomo, L.; Vernet, R.; Vulpescu, B.; Wang, M.; Zhang, X.; Zoccarato, Y.; Arbor, N.; Conesa Balbastre, G.; Faivre, J.; Furget, C.; Guernane, R.; Kox, S.; Real, J.S.; Silvestre, C.; Valle, Z. Conesa Del; Das, I.; Espagnon, B.; Hadjidakis, C.; Lakomov, I.; Suire, C.; Takaki, J. D. Tapia; Palomo, L. Valencia; Baldisseri, Alberto; Borel, Herve; Castillo Castellanos, Javier; Charvet, Jean-Luc; Pereira da Costa, Hugo; Rakotozafindrabe, A
Physics letters. B, 2014, Letnik: 734Journal Article
The inclusive J/Psi nuclear modification factor Raa in Pb-Pb collisions at sqrt(sNN)=2.76TeV 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 u+u- decay channel at forward-rapidity 2.5 < y < 4.The J/Psi 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 0.57 +- 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/Psi yield originates from charm quarks (re)combination in the deconfined partonic medium.
