Finite-temperature gluon spectral functions from lattice QCD.

We investigate gluon correlation functions and spectral functions at finite temperature in Landau gauge on lattice QCD ensembles with dynamical twisted-mass quarks flavors, generated by the tmfT collaboration. They cover a temperature range from using the fixed-scale approach. Our study of spectral properties is based on a novel Bayesian approach for the extraction of non-positive-definite spectral functions.