Photophilic hadronic axion from heavy magnetic monopoles

• Published in: The journal of high energy physics Vol. 2021; no. 6; pp. 1 - 23
• Main Authors: Sokolov, Anton V., Ringwald, Andreas
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.06.2021; Springer Nature B.V; SpringerOpen
• Subjects: Beyond Standard Model; Classical and Quantum Gravitation; Cosmology; Cosmology of Theories beyond the SM; Couplings; CP violation; Decay rate; Elementary Particles; Fermions; Globular clusters; High energy physics; Horizontal branch stars; Magnetic monopoles; Phenomenology; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Regular Article - Theoretical Physics; Relativity Theory; Scalars; Solitons Monopoles and Instantons; String Theory; Symmetry; Universe; Cosmology of Theories beyond the SM; Beyond Standard Model; CP violation; Solitons Monopoles and Instantons
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP06(2021)123

A bstract We propose a model for the QCD axion which is realized through a coupling of the Peccei-Quinn scalar field to magnetically charged fermions at high energies. We show that the axion of this model solves the strong CP problem and then integrate out heavy magnetic monopoles using the Schwinger proper time method. We find that the model discussed yields axion couplings to the Standard Model which are drastically different from the ones calculated within the KSVZ/DFSZ-type models, so that large part of the corresponding parameter space can be probed by various projected experiments. Moreover, the axion we introduce is consistent with the astrophysical hints suggested both by anomalous TeV-transparency of the Universe and by excessive cooling of horizontal branch stars in globular clusters. We argue that the leading term for the cosmic axion abundance is not changed compared to the conventional pre-inflationary QCD axion case for axion decay constant f a > 10 12 GeV.