Critical Point and Onset of Deconfinement 2016

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

2 Jun 2016, 15:00

30m

Oratorium Marianum (University of Wrocław)

Talk Parallel session 2

Speaker

Taekwang Kim (Osaka University)

Description

We analyze the production rate of photons from the deconfined medium with a quark propagator obtained from a lattice QCD numerical simulation. We calculate the production rates non-perturbatively at two temperatures above $T_{\rm c}$. The photon-quark vertex is determined gauge-invariantly so as to satisfy the Ward-Takahashi identity. It is found that the vertex correction modifies spectra quantitatively. The photon production rate shows a peculiar structure reflecting the dispersion relations and kinematics of quasi-particles. We discuss the origin of this structure.

Presentation materials

TKim20160602Wrocław.pdf