Quark-Gluon Plasma Signatures in Nucleus--Nucleus Collisions at CERN SPS

Abstract

Two signatures of the quark-gluon plasma -- strangeness `enhancement' and $J/\psi$ `suppression' -- in nucleus--nucleus collisions at the SPS energies are critically discussed.

Comments: Invited Talk at Symposium on Fundamental Issues in Elementary Matter, In Honor and Memory of Michael Danos, Bad Honnef, Germany, 25-29 September 2000 (to be published in Heavy Ion Physics) Ref. [6] is corrected