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$J/\psi$ gluonic dissociation revisited: I. Fugacity,flux and formation time effects

Authors:	B K Patra V J Menon

Institution:	(1) Department of Physics, Indian Institute of Technology, 247 667 Roorkee, India;(2) Department of Physics, Banaras Hindu University, 221 005 Varanasi, India

Abstract:	We revisit the standard treatment due to Xu et al. of $J/\psi$ suppression due to gluonic bombardment in an equilibrating quark-gluon plasma. Effects arising from gluon fugacity, relative g- $\psi$ flux, and $\psi$ meson formation time are explicitly incorporated in the formulation of the gluon number density, velocity-weighted cross section, and the survival probability. Our new formulae are applied to a numerical study of the pattern of $J/\psi$ suppression in the central rapidity region at RHIC/LHC energies. The temperature and transverse momentum dependence of our graphs have noticeable differences from those of Xu et al.Received: 27 February 2004, Revised: 3 June 2004, Published online: 6 August 2004

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