Axion-like particle oscillations

Chadha-Day, Francesca

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
• Electronic ISSN: 1475-7516
• 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
• Public URL: https://durham-repository.worktribe.com/output/1217810