Are there ALPs in the asymptotically safe landscape?

A bstract We investigate axion-like particles (ALPs) in the context of asymptotically safe gravity-matter systems. The ALP-photon interaction, which facilitates experimental searches for ALPs, is a dimension-5-operator. Quantum fluctuations of gravity lower its scaling dimension, and the ALP-photon...

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Bibliographic Details
Published in:The journal of high energy physics 2022-06, Vol.2022 (6), p.13-33, Article 13
Main Authors: de Brito, Gustavo P., Eichhorn, Astrid, Lino dos Santos, Rafael R.
Format: Article
Language:English
Subjects:
Asymptotic properties
Axions and ALPs
Classical and Quantum Gravitation
Dark matter
Elementary Particles
Expanding universe theory
Gravity
High energy physics
Models of Quantum Gravity
Photons
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Regular Article - Theoretical Physics
Relativity Theory
Renormalization Group
Scale and Conformal Symmetries
String Theory
Symmetry
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Summary:A bstract We investigate axion-like particles (ALPs) in the context of asymptotically safe gravity-matter systems. The ALP-photon interaction, which facilitates experimental searches for ALPs, is a dimension-5-operator. Quantum fluctuations of gravity lower its scaling dimension, and the ALP-photon coupling can become asymptotically free or even asymptotically safe. However, quantum fluctuations of gravity need to be strong to overcome the canonical scaling and this strong-gravity regime is in tension with the weak-gravity bound in asymptotic safety. Thus, we tentatively conclude that fundamental ALPs can likely not be accommodated in asymptotically safe gravity-matter systems. In turn, an experimental discovery of an ALP would thus shed valuable light on the quantum nature of gravity.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP06(2022)013