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$J/ψ$ production in Au+Au/Cu+Cu collisions at $\sqrt{s}_{NN}$=200 GeV and the threshold model

A. K. Chaudhuri
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Abstract

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.

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A. K. Chaudhuri. 2006-10-09. $J/ψ$ production in Au+Au/Cu+Cu collisions at $\sqrt{s}_{NN}$=200 GeV and the threshold model. https://doi.org/10.1103/physrevc.75.044902

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