Suppression of J/psi and Psi' Production in High-Energy Pb on Pb   Collisions
  The anomalous J/psi suppression in Pb-Pb collisions at 158A GeV observed recently by NA50 can be explained as due to the transition to a new phase of strong J/psi absorption, which sets in when the local energy density exceeds about 3.4 GeV/fm**3. 
Cheuk-Yin Wong (Oak Ridge National Laboratory)