Enhancement of gluonic dissociation of $J/\psi$ in viscous QGP

Abstract

We have investigated the effect of viscosity on the gluonic dissociation of $J/\psi$ in an equilibrating plasma. Suppression of $J/\psi$ due to gluonic dissociation depend on the temperature and also on the chemical equilibration rate. In an equilibrating plasma, viscosity affects the temperature evolution and also the chemical equilibration rate, requiring both of them to evolve slowly compared to their ideal counter part. For Au+Au collisions at RHIC and LHC energies, gluonic dissociation of $J/\psi$ increases for a viscous plasma. Low $P_T$ $J/\psi$'s are found to be more suppressed due to viscosity than the high $P_T$ ones. Also the effect is more at LHC energy than at RHIC energy.

3 pages, 1 figure

References in corpus (6)

• Quarkonium Interactions in Hadronic Matter
• J/Psi Suppression in an Equilibrating Parton Plasma
• Expanding Quark-Gluon Plasmas: Transverse Flow, Chemical Equilibration and Electromagnetic Radiation
• Charmonium suppression in heavy-ion collisions
• Chemical Equilibration of an Expanding Quark-Gluon Plasma
• Chemical equilibration in viscous quark-gluon plasma and electromagnetic signals