We present a study of charmonia in hot gluonic plasma, for temperatures up to three times the deconfinement transition temperature T₂. qq systems with quark masses close to the charm mass and different spin-parity quantum numbers were studied on very fine isotropic lattices. The analysis of temporal correlators, and spectral functions constructed from them, shows that the J/ and ₂ survive up to quite high temperatures, with little observable change up to 1. 5T₂, and then gradually weaken and disappear by 3T₂. For the scalar and axial vector channels, serious modifications are induced by the hot medium already close to T₂, possibly dissociating the mesons by 1. 1T₂.
Datta et al. (2004) studied this question.