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arXiv · 2004.01642

ALP Search Using Precessing Light in a Magnetized Fabry Perot Cavity

Richard Creswick·Frank T. Avignone III
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Abstract

In this paper we outline an experiment to detect the conversion of photons to axion-like particles (ALPs) in a strong magnetic field. We show that by modulating the polarization of the light passing through a Fabry-Perot cavity so that it effectively precesses at the modulation frequency, a signal is produced that is proportional to the square as opposed to the fourth power of the ALP-photon coupling constant. Assuming shot noise to be the dominant source of noise, we estimate that this approach is sensitive ALP masses less than $10^{-4} eV$ and couplings on the order to $g_{a\gamma}\sim 1.6\times 10^{-11} \text{GeV}^{-1}$ with a 10m, 10 T magnet, and $g_{a\gamma}\sim 1.6\times 10^{-12} \text{GeV}^{-1}$ with a 100 m magnet as envisaged by ALPs-IIc. ALPs with these properties have been invoked to explain the apparent transparency of the extragalactic background light (EBL) to ultra high-energy gamma rays emitted by BLAZARs.

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Richard Creswick, Frank T. Avignone III. 2020-04-03. ALP Search Using Precessing Light in a Magnetized Fabry Perot Cavity. https://doi.org/10.1088/1475-7516/2022/04/005

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