J/$\psi$ suppression in an equilibrating parton plasma

Xu, Xiao-Ming; Satz, H.; Kharzeev, D.; Wang, Xin-Nian

doi:10.1103/PhysRevC.53.3051

Article
Report number	hep-ph/9511331 ; LBL-37985 ; CERN-TH-95-304 ; CERN-TH-95-304 ; LBL-37985
Title	J/$\psi$ suppression in an equilibrating parton plasma
Author(s)	Xu, Xiao-Ming (LBL, Berkeley ; Shanghai Inst. Nucl. Res.) ; Kharzeev, D. (CERN ; Bielefeld U.) ; Satz, H. (CERN ; Bielefeld U.) ; Wang, Xin-Nian (LBL, Berkeley)
Publication	1996
Imprint	15 Nov 1995
Number of pages	14
Note	13 pages in RevTex, 5 uuencoded postscript figures included Report-no: LBL-37985, CERN-TH/95-304
In:	Phys. Rev. C 53 (1996) 3051-3056
DOI	10.1103/PhysRevC.53.3051
Subject category	Particle Physics - Phenomenology
Abstract	Short-distance QCD is employed to calculate the $J/\psi$ survival probability in an equilibrating parton gas, whose evolution is governed by a set of master rate equations. Partons in the early stage of high-energy nuclear collisions may initially not be in equilibrium, but their average transverse momentum is sufficiently high to break up a $Q\bar{Q}$ bound state. Such a break-up during the evolution of the parton gas is shown to cause a substantial $J/\psi$ suppression at both RHIC and LHC energies, using realistic estimates of the initial parton densities. The transverse momentum dependence of the suppression is also shown to be sensitive to the initial conditions and the evolution history of the parton plasma.