A New Mechanism for J/psi Suppression in Nuclear Collisions

Abstract

We present new results based on an improved version of the Glauber model, used to describe the nuclear absorption of J/psi in reactions between nuclei at high energy. The excitation of the colour degrees of freedom of nucleons, due to collisions mediated by one-gluon exchange, is taken into account. It is found that the proposed mechanism leads to larger nuclear absorption of J/psi than previously considered.

Comments: 6 pages, LaTeX, uses psfig.sty, Contribution to the XXVIII International Workshop on Gross Properties of Nuclei and Nuclear Excitations, 'Hardons in Dense Matter', Hirschegg, Austria, January 16-22 2000