| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8186747 | Physics Letters B | 2018 | 5 Pages |
Abstract
We show that the axion coupling to photons can be enhanced in simple models with a single Peccei-Quinn field, if the gauge coupling unification is realized by a large kinetic mixing Ï=O(0.1) between hypercharge and unbroken hidden U(1)H. The key observation is that the U(1)H gauge coupling should be rather strong to induce such large kinetic mixing, leading to enhanced contributions of hidden matter fields to the electromagnetic anomaly. We find that the axion-photon coupling is enhanced by about a factor of 10-100 with respect to the GUT-axion models with E/N=8/3.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Ryuji Daido, Fuminobu Takahashi, Norimi Yokozaki,