J/ψ production in Au+Au collisions at RHIC and the nuclear absorption · arXivDesk
nucl-th/0307029Jul 8, 2003Revised version, published in Phys. Rev. C 74(2006)044907. PHENIX preliminary data on the centrality dependence of nuclear modification factor for $J/ψ$ in Cu+Cu and in Au+Au are analysed. 6 pages, 5 figures
J/ψ production in Au+Au collisions at RHIC and the nuclear absorption
It is shown that a QCD based nuclear absorption model, with few parameters fixed to reproduce experimental J/ψ yield in 200 GeV pp/pA and 450 GeV pA collisions can explain the preliminary PHENIX data on the centrality dependence of J/ψ suppression in Cu+Cu collisions at RHIC energy, sNN
Nearby in the stack
=200 GeV. However, the model does not give satisfactory description to the preliminary PHENIX data on the centrality dependence of
J/ψ
suppression in Au+Au collisions. The analysis suggest that in Au+Au collisions,
J/ψ
are suppressed in a medium unlike the medium produced in SPS energy nuclear collisions or in RHIC energy Cu+Cu collisions.