Gluons at finite temperature
  The gluon propagator is investigated at finite temperature via lattice simulations. In particular, we discuss its interpretation as a massive-type bosonic propagator. Moreover, we compute the corresponding spectral density and study the violation of spectral positivity. Finally, we explore the dependence of the gluon propagator on the phase of the Polyakov loop. 
P. J. Silva, O. Oliveira, D. Dudal, P. Bicudo, N. Cardoso
hep-lat