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arXiv · 2605.30416

A Bandpass Axion Or: How I Learned To Stop Worrying About Stars And Love The Lab

Dawid Brzeminski·Anson Hook
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Abstract

Axion-like particles coupled to photons are one of the most compelling new physics scenarios. We demonstrate that an axion-photon coupling resulting from a non-anomalous PQ symmetry under which light fermions are charged acts as a bandpass filter: both high- and low-energy probes experience a parametrically suppressed coupling while intermediate-energy probes remain unaffected. An immediate result of this bandpass is that lab-based constraints can naturally be the dominant constraint for almost all values of the axion mass. High-energy constraints coming from stellar dynamics as well as low-energy constraints coming from photon-axion conversion in galactic/stellar magnetic fields are simultaneously suppressed, while lab-based experiments, such as light-shining-through-a-wall experiments, done at intermediate energies are unsuppressed.

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Dawid Brzeminski, Anson Hook. 2026-05-28. A Bandpass Axion Or: How I Learned To Stop Worrying About Stars And Love The Lab. https://arxiv.org/abs/2605.30416

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