Axion-like particle oscillations

Chadha-Day, Francesca

doi:10.1088/1475-7516/2022/01/013

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Authors

Ms Francesca Chadha-Day francesca.chadha-day@durham.ac.uk
Assistant Professor

Abstract

String theory compactifications may generate many light axion-like particles (ALPs) with weak couplings to electromagnetism. In general, a large number of ALPs may exist, with a linear combination having a potentially observable coupling to electromagnetism. The basis in which only one ALP couples to electromagnetism is in general misaligned with the mass basis. This leads to mixing between the `electromagnetic' ALP and a number of `hidden' ALPs that do not interact directly with the photon. The process is analagous to neutrino oscillations. I will discuss the phenomenological consequences of this mixing for astrophysical ALP signals, in particular showing that it may significantly reduce the predicted signal in experiments such as the CERN Axion Solar Telescope.

Citation

Chadha-Day, F. (2022). Axion-like particle oscillations. Journal of Cosmology and Astroparticle Physics, 2022(01), Article 013. https://doi.org/10.1088/1475-7516/2022/01/013

Journal Article Type	Article
Acceptance Date	Dec 19, 2021
Online Publication Date	Jan 10, 2022
Publication Date	2022-01
Deposit Date	Jan 18, 2022
Publicly Available Date	Jan 19, 2022
Journal	Journal of Cosmology and Astroparticle Physics
Publisher	IOP Publishing
Peer Reviewed	Peer Reviewed
Volume	2022
Issue	01
Article Number	013
DOI	https://doi.org/10.1088/1475-7516/2022/01/013

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© 2022 The Author(s). Published by IOP Publishing Ltd on behalf of Sissa Medialab. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.