Quadratic coupling of the axion to photons
We show that the QCD axion couples to the electromagnetic kinetic term at one loop. The result is that if axions make up dark matter, they induce temporal variation of the fine structure constant <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>α</a:mi></a:math>, which is severely constrained. We recast these constraints on the QCD axion parameter space. We also discuss how to generalize our finding to axionlike particles, and the resulting constraints. Published by the American Physical Society 2024
Authors
- Sebastian A. R. Ellis (ORCID: https://orcid.org/0000-0003-3611-2437)
- Pham Ngoc Hoa Vuong (ORCID: https://orcid.org/0000-0001-9778-1250)
- Carl Beadle (ORCID: https://orcid.org/0009-0004-9176-3827)
- Jérémie Quevillon
Institutions
- University of Geneva (CH)
- Deutsches Elektronen-Synchrotron DESY (DE)
- Laboratoire de Physique Subatomique et de Cosmologie (FR)
- European Organization for Nuclear Research (CH)
- Université Grenoble Alpes (FR)
Publication Details
- Journal
- Physical review. D/Physical review. D.
- Published
- 2024-08-13
- DOI
- https://doi.org/10.1103/physrevd.110.035019
- Citations
- 15
- Primary Topic
- Dark Matter and Cosmic Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 9.89
Funders
- Deutsche Forschungsgemeinschaft
- Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
- Centre National de la Recherche Scientifique
- Institut National de Physique Nucléaire et de Physique des Particules