Charmonium Suppression in Lead-Lead Collisions: Is There a Break in the $J/\psi$ Cross-Section?

Abstract

In the framework of a model based on nuclear absorption plus comover interaction, we compute the $E_T$ distribution of the $J/\psi$ in $PbPb$ collisions at SPS and compare it with available NA50 data. Our analysis suggests that the existence of new physics (deconfinement phase transition) in the region $E_{T} \lsim 100$ GeV is unlikely and that signals of new physics should rather be searched in the region $E_T \gsim 100$ GeV. The $E_T$ dependence of the $J/\psi$ transverse momentum has been computed. At large $E_T$ it turns out to be much flatter in the comover approach than in a phase transition framework. Estimates of the $J/\psi$ suppression at RHIC and LHC energies are also given.

31 pages, LaTeX, 9 postscript figures included using epsfig; references updated and comments added; final version to appear in Phys. Rev. C

References in corpus (8)

• A quantitative reanalysis of charmonium suppression in nuclear collisions
• The Transverse Momentum Dependence of Anomalous $J/\psi$ Suppression
• ${\Psi }^{\prime }/\Psi$ ratio in Nucleus-Nucleus Collisions : a Measure for the Chiral Symmetry Restoration Temperature ?
• J/ψSuppression in Pb+Pb Collisions: A New Look at Hadrons vs. Plasma
• Probabilistic versus Field-Theoretical Description of Heavy Flavour Production off Nuclei
• The Role of Gluon Depletion in J/psi Suppression
• Enhanced J/psi suppression due to gluon depletion
• Interpretations of $J/\psi$ suppression

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