$J/\psi$ suppression in Pb+Pb collisions and $p_T$ broadening

Abstract

We have analysed the NA50 data, on the centrality dependence of $p_T$ broadening of $J/\psi$'s, in Pb+Pb collisions, at the CERN-SPS. The data were analysed in a QCD based model, where $J/\psi$'s are suppressed in 'nuclear' medium. Without any free parameter, the model could explain the NA50 $p_T$ broadening data. The data were also analysed in a QGP based threshold model, where $J/\psi$ suppression is 100% above a critical density. The QGP based model could not explain the NA50 $p_T$ broadening data. We have also predicted the centrality dependence of $J/\psi$ suppression and $p_T$ broadening at RHIC energy. Both the models, the QGP based threshold model and the QCD based nuclear absorption model, predict $p_T$ broadening very close to each other.

The paper was completely revised. The conclusion is also changed. 5 pages, 4 figures

References in corpus (6)

• Hadron production in nuclear collisions at RHIC and high density QCD
• $J/\psi$ suppression in Pb+Pb collisions, a conventional description
• Time Structure of Anomalous J/psi and psi' suppression in nuclear collisions
• J/$\psi$ production and suppression in nuclear collisions
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Cited by in corpus (2)

• J/psi transport in QGP and Pt distribution at SPS and RHIC
• $J/\psi$ production in Au+Au collisions at RHIC and the nuclear absorption