Spectra of Quarkonia at Finite Temperature
  Finite-temperature spectra of heavy quarkonia are calculated by combining potential model and thermofield dynamics formalisms. The mass spectra of the heavy quarkonia with various quark contents are calculated. It is found that binding mass of the quarkonium decreases as temperature increases. 
D.U.Matrasulov, F.C.Khanna, Kh.T.Butanov and Kh.Yu.Rakhimov