Searching for a dark matter induced galactic axion gradient

Hardy, Edward ORCID: 0000-0003-3263-6575, Reig, Mario and Smirnov, Juri ORCID: 0000-0002-3082-0929 (2025) Searching for a dark matter induced galactic axion gradient PHYSICAL REVIEW D, 111 (1). 015006-. ISSN 2470-0010, 2470-0029

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Abstract

An ultralight axion with CP violating interactions with a dark sector and CP preserving interactions with the visible sector can act as a novel portal between dark matter and the Standard Model. In such theories, dark matter sources an axion field extending over the entire galaxy, the gradient of which can be searched for with precise spin precession experiments. A reinterpretation of existing co-magnetometer data already constrains theories that are consistent with astrophysical bounds, and near-future experiments will begin probing well-motivated models. The required interactions can arise from a confining hidden sector without necessitating fine-tuning of the axion's mass.

Item Type:	Article
Uncontrolled Keywords:	5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 51 Physical Sciences
Divisions:	Faculty of Science & Engineering Faculty of Science & Engineering > School of Physical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	14 Feb 2025 13:50
Last Modified:	16 Jun 2026 09:26
DOI:	10.1103/PhysRevD.111.015006
Open Access URL:	https://doi.org/10.1103/PhysRevD.111.015006
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3190314
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