Transition radiation as a probe of chiral anomaly

TL;DR

This paper explores how transition radiation emitted by fast charged particles at the boundary of chiral matter can serve as a probe to detect and analyze the chiral anomaly across various physical media.

Contribution

It introduces the concept of chiral transition radiation as a novel method to investigate the chiral anomaly in different materials and states of matter.

Findings

Resonant emission angle depends on chiral anomaly parameters.

Spectrum exhibits circular polarization linked to chiral properties.

Potential applications in quark-gluon plasma, Weyl semimetals, and dark matter detection.

Abstract

A fast charged particle crossing the boundary between the chiral matter and vacuum radiates the transition radiation. Its most remarkable features --- the resonant behavior at a certain emission angle and the circular polarization of the spectrum --- depend on the parameters of the chiral anomaly in a particular material/matter. The chiral transition radiation can be used to investigate the chiral anomaly in such diverse media as the quark-gluon plasma, the Weyl semimetals, and the axionic dark matter.