The ALICE experiment has measured the inclusive J/Psi 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/Psi 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/Psi production from charm quarks in a deconfined partonic phase can describe our data.
Titolo: | J/ψ Suppression at Forward Rapidity in Pb-Pb Collisions at sqrt[s_{NN}]=2.76 TeV |
Autori: | |
Data di pubblicazione: | 2012 |
Rivista: | |
Abstract: | The ALICE experiment has measured the inclusive J/Psi 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/Psi 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/Psi production from charm quarks in a deconfined partonic phase can describe our data. |
Handle: | http://hdl.handle.net/11368/2609221 |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevLett.109.072301 |
URL: | http://prl.aps.org/abstract/PRL/v109/i7/e072301 |
Appare nelle tipologie: | 1.1 Articolo in Rivista |