Generation of Axion-Like Couplings via Quantum Corrections in a Lorentz Violating Background

TL;DR

This paper demonstrates that quantum corrections from a Lorentz-violating background can generate Lorentz-invariant axion-like couplings to photons, suggesting new ways spacetime symmetry violations might influence particle interactions.

Contribution

It reveals a mechanism where Lorentz violation at high energies leads to Lorentz-invariant ALP-photon couplings, with potential implications for Higgs phenomenology.

Findings

Generated ALP-photon coupling is Lorentz invariant.

Lorentz violation effects can manifest as standard ALP interactions.

Possible extension to scalar-photon couplings relevant for Higgs physics.

Abstract

Light pseudoscalars, or axion like particles (ALPs), are much studied due to their potential relevance to the fields of particle physics, astrophysics and cosmology. The most relevant coupling of ALPs from the viewpoint of current experimental searches is to the photon: in this work, we study the generation of this coupling as an effect of quantum corrections, originated from an underlying Lorentz violating background. Most interestingly, we show that the interaction so generated turns out to be Lorentz invariant, thus mimicking the standard ALPs coupling to the photon that is considered in the experiments. This consideration implies that violations of spacetime symmetries, much studied as possible consequences of physics in very high energy scales, might infiltrate in other realms of physics in unsuspected ways. Additionally, we conjecture that a similar mechanism can also generate Lorentz invariant couplings involving scalar particles and photons, playing a possible role in the phenomenology of Higgs bosons.