Charmonium dissociation and heavy quark transport in hot quenched   lattice QCD
  We study the properties of charmonium states at finite temperature in quenched lattice QCD on large and fine isotropic lattices. We perform a detailed analysis of charmonium correlation and spectral functions both below and above Tc. Our analysis suggests that the S wave states disappear at about 1.5 Tc. The charm diffusion coefficient is estimated and found to be approximately 1/{\pi}T at 1.5Tc {\leq} T {\leq} 3Tc. 
H.-T. Ding, A. Francis, O. Kaczmarek, F. Karsch, H. Satz and W.   S\"oldner
hep-ph hep-lat nucl-th