$J/\psi$ suppression and QCD phase diagram
  QCD phase diagram is obtained by analysing centrality dependence of $J/\psi$ suppression in $\snn$=17.3 Pb+Pb and $\snn$=200 GeV Au+Au collisions. $J/\psi$'s produced in initial interactions are assumed to dissolve if local temperature exceeds a threshold temperature. The threshold temperature depends on the (local) fluid temperature and baryonic chemical potential, which are obtained, under certain assumptions, from experimentally determined quantities e.g. rapidity density, net baryon density. QCD critical line with curvature parameter $\kappa\approx 0.018-0.23$ is consistent with experimental $J/\psi$ data. $\kappa$ is factor of $\sim$3 larger than in lattice QCD calculations. 
A. K. Chaudhuri and Partha Pratim Bhaduri
nucl-th hep-ph