J/\psi Suppression in Pb+Pb Collisions: A New Look at Hadrons vs. Plasma

Abstract

A reexamination of hadronic comover scattering indicates that this mechanism cannot explain the observed $\psi$ suppression in Pb+Pb interactions. The possibility of quark-gluon plasma formation is therefore considered.

Comments: Calculations redone, figures updated, conclusions unchanged, to be published in Phys. Lett. B. 13 pages, LaTeX, uses epsf style, 4 figures