Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2006-10-09
Phys.Rev.C75:044902,2007
Physics
Nuclear Physics
Nuclear Theory
6 pages, 5 figures
Scientific paper
10.1103/PhysRevC.75.044902
Using the QGP motivated threshold model, where all the $J/\psi$'s are suppressed above a threshold density, we have analyzed the preliminary PHENIX data on the centrality dependence of nuclear modification factor for $J/\psi$'s in Cu+Cu and in Au+Au collisions, at RHIC energy, $\sqrt{s}_{NN}$=200 GeV. Centrality dependence of $J/\psi$ suppression in Au+Au collisions are well explained in the model for threshold densities in ranges of 3.6-3.7 $fm^{-2}$. $J/\psi$ suppression in Cu+Cu collisions on the other hand are not explained in the model.
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