Nuclear suppression of J/Psi: From RHIC to the LHC

作者：Kopeliovich B Z^*; Potashnikova I K; Schmidt Ivan

来源：Nuclear Physics A, 2011, 864(1): 203-212.

DOI：10.1016/j.nuclphysa.2011.06.024

• Charmonium
• Nuclei
• Suppression
• Transport coefficient

A parameter-free calculation for J/Psi suppression in pA collisions, based on the dipole description, is confronted with the new data from the PHENIX experiment. Achieving good agreement, we employed this model predicting the contribution of initial state interactions (ISI) to J/Psi suppression in AA collisions. Such a transition from pA to AA is not straightforward, since involves specific effects of double color filtering and boosting of the saturation scale. Relying on this refined ISI contribution, we updated the previous analysis of RHIC data on J/Psi production in Cu-Cu and Au-Au collisions at root s = 200 GeV, and determined the transport coefficient of the created dense medium at (q) over cap (0) = 0.6 GeV2/fm. Nuclear effects for J/Psi production at the LHC are predicted using the transport coefficient (q) over cap (0) = 0.8 GeV2/fm, extracted from data on suppression of high-p(T) hadrons in central lead lead collisions at root s = 2.76 TeV. Our analysis covers only direct J/Psi production, while data may also include the feed-down from decay of heavier states and B-mesons.

• 出版日期2011-8-1