Spectral functions of charmonium with 2+1 flavours of dynamical quarks
  Finite temperature charmonium spectral functions in the pseudoscalar(PS) and vector(V) channels are studied in lattice QCD with 2+1 flavours of dynamical Wilson quarks, on fine isotropic lattices (with a lattice spacing of 0.057fm), with a non-physical pion mass of 545MeV. The highest temperature studied is approximately 1.4Tc. Up to this temperature no significant variation of the spectral function is seen in the PS channel. The V channel shows some temperature dependence, which seems to be consistent with a temperature dependent low frequency peak related to heavy quark transport, plus a temperature independent term at omega > 0. These results are in accord with previous calculations using the quenched approximation. 
Szabolcs Borsanyi and Stephan D\"urr and Zolt\'an Fodor and Christian   Hoelbling and S\'andor D. Katz and Stefan Krieg and ...
hep-lat