J/psi suppression at forward rapidity in Pb-Pb collisions at √sNN = 2.76 TeV

Submission Date: 
07/02/2012
Article Information
Submission Form
System: 
Pb-Pb
Energy: 
2.76 TeV
Abstract Plain Text: 

The ALICE experiment has measured the inclusive J/ψ production in Pb-Pb collisions at √sNN = 2.76 TeV down to pt = 0 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.) ± 0.084(syst.) and does not exhibit a significant de- pendence on the collision centrality. These features appear significantly different from lower energy measurements. Models including J/ψ production from charm quarks in a deconfined partonic phase can describe our data.