Measurements of J/$\Psi$ $\rightarrow$ e$^+$e$^-$ in Au-Aucollisions at $\sqrt{s_{NN}}$ =200 GeV by PHENIX at RHIC

ORAL

Abstract

Measurements of the J/$\Psi$ yield in heavy ion collisions are expected to be one of the most promising probes of deconfined matter, since theoretical models predict that the J/$\Psi$ yield could be strongly suppressed due to the color Debye screening effect in Quark Gluon Plasma. Recently, many theoretical efforts have been made to investigate the behavior of J/$\Psi$ production at RHIC energy. One of the interesting predictions that has emerged, is that the $J/\Psi$ yield could be enhanced due to the recombination of uncorrelated $c\bar{c}$ pairs. The PHENIX experiment measured the $J/\Psi$ yield in Au-Au collisions at $\sqrt{s_{NN}} = 200$ GeV by using $e^+e^-$ decay mode at mid-rapidity ($|\eta|<0.35$) and $\mu^{+}\mu^{-}$ decay mode at forward-rapidities ($1.2<|\eta|<2.2$). The latest results of $J/\Psi$ invariant yield and $J/\Psi$ pT distribution obtained by using its $e^+e^-$ decay mode from $\sqrt{S_{NN}}$ = 200GeV Au+Au collisions will be shown.

Authors

  • Taku Gunji

    Center for Nuclear Study, University of Tokyo