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J/ψJ/\psi suppression at forward rapidity in Pb-Pb collisions at sNN=2.76\sqrt{s_{NN}}=2.76 TeV

Collaboration
Feb, 2012
16 pages
Published in:
  • Phys.Rev.Lett. 109 (2012) 072301
e-Print:
DOI:
Report number:
  • CERN-PH-EP-2012-012
Experiments:
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Abstract: (arXiv)
The ALICE experiment has measured the inclusive J/ψ\psi production in Pb-Pb collisions at sNN=2.76\sqrt{s_{\mathrm{NN}} } = 2.76 TeV down to zero transverse momentum in the rapidity range 2.5<y<42.5 < y < 4. A suppression of the inclusive J/ψ\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.)0.545 \pm 0.032 \rm{(stat.)} \pm 0.083 \rm{(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\psi production from charm quarks in a deconfined partonic phase can describe our data.
Note:
  • J/psi(3100): production
  • J/psi(3100): yield
  • transverse momentum: low
  • heavy ion: scattering
  • p p: scattering
  • impact parameter
  • deconfinement
  • suppression
  • rapidity
  • binary
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