Medium modifications and production of charmonia at LHC
Abstract
A previously constructed transport approach to calculate the evolution of quarkonium yields and spectra in heavy-ion collisions is applied to Pb sbnd Pb ( √{s}=2.76 A TeV) collisions at the Large Hadron Collider (LHC). In this approach spectral properties of charmonia are constrained by Euclidean correlators from thermal lattice QCD and subsequently implemented into a Boltzmann equation accounting for both suppression and regeneration reactions. Based on a fair description of SPS and RHIC data, we provide predictions for the centrality dependence of J/ψ yields at LHC. The main uncertainty is associated with the input charm cross section, in particular its hitherto unknown reduction due to shadowing in nuclear collisions. Incomplete charm-quark thermalization and non-equilibrium in charmonium chemistry entail a marked reduction of the regeneration yield compared to the statistical equilibrium limit.
- Publication:
-
Nuclear Physics A
- Pub Date:
- June 2011
- DOI:
- 10.1016/j.nuclphysa.2011.05.001
- arXiv:
- arXiv:1102.2194
- Bibcode:
- 2011NuPhA.859..114Z
- Keywords:
-
- Quark–gluon plasma;
- Charmonia;
- Ultrarelativistic heavy-ion collisions;
- High Energy Physics - Phenomenology;
- Nuclear Experiment;
- Nuclear Theory
- E-Print:
- 7 pages, 9 eps figures