Non-perturbative production rate of photons with a lattice quark propagator: effect of vertex correction

Abstract

We analyze the production rate of photons from the thermal medium above the deconfinement temperature with a quark propagator obtained from a lattice QCD numerical simulation. The photon-quark vertex is determined gauge-invariantly, so as to satisfy the Ward-Takahashi identity. The obtained photon production rate shows a suppression compared to perturbative results.

Comments: 5 pages, 3 figures, contribution to the proceedings of Critical Point and Onset of Deconfinement 2016 (CPOD2016), Wrocław, Poland, May 30 - June 4, 2016