Quark spectral properties above Tc from Dyson-Schwinger equations

Understand

We report on an analysis of the quark spectral representation at finite temperatures based on the quark propagator determined from its Dyson-Schwinger equation in Landau gauge.

• In Euclidean space we achieve nice agreement with recent results from quenched lattice QCD.
• We find different analytical properties of the quark propagator below and above the deconfinement transition.
• Using a variety of ansaetze for the spectral function we then analyze the possible quasiparticle spectrum, in particular its quark mass and momentum dependence in the high temperature phase.