$J/ψ$ production in Au+Au/Cu+Cu collisions at $\sqrt{s}_{NN}$=200 GeV and the threshold model
Abstract
Description
Using the QGP motivated threshold model, where all the $J/ψ$'s are suppressed above a threshold density, we have analyzed the preliminary PHENIX data on the centrality dependence of nuclear modification factor for $J/ψ$'s in Cu+Cu and in Au+Au collisions, at RHIC energy, $\sqrt{s}_{NN}$=200 GeV. Centrality dependence of $J/ψ$ suppression in Au+Au collisions are well explained in the model for threshold densities in ranges of 3.6-3.7 $fm^{-2}$. $J/ψ$ suppression in Cu+Cu collisions on the other hand are not explained in the model.
6 pages, 5 figures
6 pages, 5 figures