J/ψ Suppression at Forward Rapidity in Pb-Pb Collisions at sNN=2.76TeV
Abstract
The ALICE experiment has measured the inclusive J/ψ production in Pb-Pb collisions at sNN=2.76TeV 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.
- Publication:
-
Physical Review Letters
- Pub Date:
- August 2012
- DOI:
- 10.1103/PhysRevLett.109.072301
- arXiv:
- arXiv:1202.1383
- Bibcode:
- 2012PhRvL.109g2301A
- Keywords:
-
- 25.75.Cj;
- 25.75.Dw;
- 25.75.Nq;
- Photon lepton and heavy quark production in relativistic heavy ion collisions;
- Particle and resonance production;
- Quark deconfinement quark-gluon plasma production and phase transitions;
- High Energy Physics - Experiment;
- Nuclear Experiment
- E-Print:
- 17 pages, 4 captioned figures, 2 tables, authors from page 12, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/3078