Photon radiation from quark-gluon plasma by means of chiral anomalies without magnetic field

TL;DR

This paper introduces a novel photon emission mechanism from quark-gluon plasma driven by chiral anomalies, which does not require magnetic fields and results in emission rates comparable to traditional processes.

Contribution

It proposes a new photon radiation channel via tachyonic mass acquisition in CP-odd domains, expanding understanding of plasma emissions without external magnetic fields.

Findings

Photon emission rate is comparable to conventional processes.

Photon can be emitted via decay and annihilation processes related to chiral Cherenkov radiation.

Mechanism operates without external magnetic fields.

Abstract

We discuss a new channel of photon emission from the quark-gluon plasma, which opens up as photon acquires a tachyonic mass in the presence of the CP-odd topological domains generated by the chiral anomaly. It allows photon radiation through the decay $q\to q\gamma$ and annihilation $q\bar q\to \gamma$ processes closely related to the chiral Cherenkov radiation. Unlike previous proposals this mechanism does not require an external magnetic field. The differential photon emission rate per unit volume is computed and shown to be comparable to the rate of photon emission in conventional processes.