Effect of magnetic field on the photon radiation from quark-gluon plasma in heavy ion collisions

TL;DR

This paper develops a formalism to study how magnetic fields influence photon emission from quark-gluon plasma in heavy ion collisions, concluding that magnetic effects are negligible for photon emission rates and azimuthal asymmetry.

Contribution

It introduces a new formalism to analyze magnetic field effects on photon emission from quark-gluon plasma in heavy ion collisions.

Findings

Magnetic field effects on photon emission are negligible.

Magnetic fields do not significantly affect azimuthal asymmetry in photon spectra.

Photon emission rates are largely unaffected by magnetic fields in realistic scenarios.

Abstract

We develop a formalism for the photon emission from the quark-gluon plasma with an external electromagnetic field. We then use it to investigate the effect of magnetic field on the photon emission from the quark-gluon plasma created in $AA$ collisions. We find that even for very optimistic assumption on the magnitude of the magnetic field generated in $AA$ collisions its effect on the photon emission rate is practically negligible. For this reason the magnetic field cannot generate a significant azimuthal asymmetry in the photon spectrum.