Seminare de DPNC ================ Mercredi, 9. juillet 1997 17.00 - Auditoire Stuckelberg Universite de Geneve Departement de physique nucleaire et corpusculaire 24, quai Ernest-Ansermet 1211 Geneva 4 Tel. 022 702 6273 Fax. 022 781 2192 ****************************************************************************** Sujet: The Little Bang: Recreating the Early Universe in high energy heavy-ion collisions Par: Prof. Ulrich Heinz, University of Regensburg Resume: I will give a general overview of the physics in the various stages of a relativistic heavy ion collision and of our search for the Quark-Gluon Plasma. I then summarize our present experimental knowledge about thermalization and chemical equilibration in such collisions. I will close with a discussion of two-particle Bose-Einstein correlations and a new estimate for the initial energy density reached in Pb+Pb collisions at the CERN SPS.