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Axion-like particle oscillations

Chadha-Day, Francesca

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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.


Chadha-Day, F. (2022). Axion-like particle oscillations. Journal of Cosmology and Astroparticle Physics, 2022(01), Article 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


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

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