Sudden Hadronization in Relativistic Nuclear Collisions
  We formulate and study a mechanical instability criterion for sudden hadronization of dense matter fireballs formed in 158A GeV Pb--Pb collisions. Considering properties of quark-gluon matter and hadron gas we obtain the phase boundary between these two phases and demonstrate that the required deep QGP supercooling prior to sudden hadronization has occurred. 
Johann Rafelski (Arizona) and Jean Letessier (Paris)