Photon emission from quark-gluon plasma out of equilibrium

Abstract

The photon emission from a non-equilibrium quark-gluon plasma (QGP) is analyzed. We derive an integral equation that describes photon production through quark-antiquark annihilation and quark bremsstrahlung. It includes coherence between different scattering sites, also known as the Landau-Pomeranchuk-Migdal effect. These leading-order processes are studied for the first time together in an out-of-equilibrium field theoretical treatment that enables the inclusion of viscous corrections to the calculation of electromagnetic emission rates. In the special case of an isotropic, viscous, plasma the integral equation only depends on three constants which capture the non-equilibrium nature of the medium.

Discussion of photon rate at higher anisotropy extended, typos corrected, referenced added, published version

References in corpus (2)

• Photon production from an anisotropic quark-gluon plasma
• Photon Emission from a Momentum Anisotropic Quark-Gluon Plasma

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