Search for QGP and Thermal Freeze-out of Strange Hadrons
  After reviewing the observables of QGP we perform an analysis of m_T spectra of strange hadrons measured as function of centrality in 156AGeV Pb--Pb interactions. We show that there is a good agreement between the chemical and thermal freeze-out conditions, providing additional evidence for the formation and sudden disintegration of a supercooled QGP fireball. 
Giorgio Torrieri and Johann Rafelski (U of Arizona, Tucson)