Experimental Searches for the Axion and Axion-Like Particles

2015/08/08 by Peter W. Graham, Igor G. Irastorza, Steven K. Lamoreaux +2 · 1 voice · 637 citations
Materials Science · Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Chemical and Physical Properties of Materials #Dark Matter and Cosmic Phenomena #astro-ph.CO #hep-ex #hep-ph

paper · pdf · doi:10.1146/annurev-nucl-102014-022120

published in Annual Review of Nuclear and Particle Science 65(1), 485-514 (Annual Reviews) · Published in Annual Review of Nuclear and Particle Science Vol. 65 (2015). 31 pages, 14 figures. Posted with permission from the Annual Review of Nuclear and Particle Science, Volume 65. copyright 2015 by Annual Reviews, http://www.annualreviews.org

openalex publication_date 2015/08/08 · crossref created 2015/08/08 · crossref issued 2015/10/19 · crossref published 2015/10/19 · crossref published-print 2015/10/19 · arxiv created 2016/01/29 · arxiv published 2016/01/29 · arxiv updated 2016/02/02 · openalex created_date 2016/06/24 · crossref deposited 2021/10/15 · openalex updated_date 2026/07/30 · crossref indexed 2026/08/04

Abstract

Four decades after its prediction, the axion remains the most compelling solution to the strong-CP problem and a well-motivated dark matter candidate, inspiring a host of elegant and ultrasensitive experiments based on axion–photon mixing. This article reviews the experimental situation on several fronts. The microwave cavity experiment is making excellent progress in the search for dark matter axions in the μeV range and may plausibly be extended up to 100 μeV. Within the past several years, however, researchers have realized that axions are pervasive throughout string theories, but with masses that fall naturally in the neV range, for which an NMR-based search is under development. Both searches for axions emitted from the Sun's burning core and purely laboratory experiments based on photon regeneration have recently made great progress, with ambitious projects proposed for the coming decade. Each of these campaigns has pushed the state of the art in technology, enabling large gains in sensitivity and mass reach. Furthermore, each modality has been exploited in order to search for more generalized axion-like particles, which we also discuss in this review. We are hopeful, even optimistic, that the next review of the subject will concern the discovery of the axion, its properties, and its exploitation as a probe of early universe cosmology and structure formation.

Citations

• Cavity Quantum Electrodynamics

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Discussions

• This paper is by serious astrophysicists with a lot of experience with these kinds of cooling curves. However, this paper has not found traction in the particle physics community, where the earlier re [bsky, 4 points, 0 comments]

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