Axion-Photon Interaction from Nonminimal Dimension-5 Lorentz-Violating Operators

TL;DR

This paper investigates how axion-photon interactions can be generated through Lorentz-violating extensions of QED with dimension-5 operators, revealing limited schemes and inherent ambiguities in the process.

Contribution

It identifies specific schemes for generating axion-photon interactions via one-loop corrections in Lorentz-breaking QED extensions and highlights their ambiguities.

Findings

Few schemes allow finite axion-photon term generation

Generated terms are inherently ambiguous

One-loop radiative corrections are central to the analysis

Abstract

In this paper, we discuss various possible schemes for the perturbative generation of the axion-photon interaction term in different Lorentz-breaking extensions of QED, involving operators with mass dimensions up to 5. We demonstrate explicitly that there are only a few schemes allowing to generate a finite axion-photon interaction term from one-loop radiative corrections, and within all these schemes, the generated term turns out to be ambiguous.