Abstract
The photon production rate from the deconfined medium is analyzed with the photon self-energy constructed from the quark propagator obtained by numerical simulation on the quenched lattice for two values of temperature, |$T=1.5T_{\rm c}$| and |$3T_{\rm c}$|, above the critical temperature |$T_{\rm c}$|. The photon self-energy is calculated by the Schwinger–Dyson equation with the lattice quark propagator and a vertex function determined so as to satisfy the Ward–Takahashi identity. The obtained photon production rate exhibits a similar behavior to the perturbative results for photon energies larger than |$0.5$| GeV.
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