Critical Behavior of J/psi across the Phase Transition from QCD sum   rules
  We study behavior of J/psi in hot gluonic matter using   QCD sum rules. Taking into account temperature dependences of the gluon condensates extracted from lattice thermodynamics for the pure SU(3) system, we find that the mass and width of J/psi exhibit rapid change across the critical temperature. 
Kenji Morita