  Recent lattice studies of string breaking in QCD with dynamical quarks
determine the in-medium temperature dependence of the heavy quark potential.
Comparing this to the binding energies of different quarkonium states, we check
if these can decay into open charm/beauty in a confined hadronic medium. Our
studies indicate in particular that the chi_c and the psi dissociate into open
charm below the deconfinement point.
