Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-05-20
Acta Phys.Polon. B33 (2002) 1583-1600
Physics
High Energy Physics
High Energy Physics - Phenomenology
Revtex, 8 pages, 9 figures (included). Talk given at the Cracow Epiphany Conference on Quarks and Gluons in Extreme Conditions
Scientific paper
A model for $J/\Psi$ suppression at a high energy heavy ion collision is presented. The main (and the only) reason for the suppression is $J/\Psi$ inelastic scattering within hadron matter. The hadron matter is in the form of an evolving multi-component point-like non-interacting gas. The estimations of the sound velocity in the gas and the approximate pattern of cooling caused by the longitudinal expansion are also presented. It is shown that under such circumstances and with $J/\Psi$ disintegration in nuclear matter added, $J/\Psi$ suppression evaluated agrees well with NA38 and NA50 data. Additionally, some rough estimations of $J/\Psi$ suppression in hadron matter described in the framework of the excluded volume gas model are given.
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