Charmonium spectra at finite temperature from QCD sum rules with the   maximum entropy method
  Charmonia spectral functions at finite temperature are studied using QCD sum rules in combination with the maximum entropy method. This approach enables us to directly obtain the spectral function from the sum rules, without having to introduce any specific assumption about its functional form. As a result, it is found that while J/psi and eta_c manifest themselves as significant peaks in the spectral function below the deconfinement temperature T_c, they quickly dissolve into the continuum and almost completely disappear at temperatures between 1.0 T_c and 1.1 T_c. 
Philipp Gubler, Kenji Morita, Makoto Oka
hep-ph hep-ex hep-lat