Axion couplings in grand unified theories
Abstract We show that the couplings of axions to gauge bosons are highly restricted in Grand Unified Theories where the standard model is embedded in a simple 4D gauge group. The topological nature of these couplings allows them to be matched from the UV to the IR, and the ratio of the anomaly with...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2022-10-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP10(2022)141 |
| _version_ | 1828096229989416960 |
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| author | Prateek Agrawal Michael Nee Mario Reig |
| author_facet | Prateek Agrawal Michael Nee Mario Reig |
| author_sort | Prateek Agrawal |
| collection | DOAJ |
| description | Abstract We show that the couplings of axions to gauge bosons are highly restricted in Grand Unified Theories where the standard model is embedded in a simple 4D gauge group. The topological nature of these couplings allows them to be matched from the UV to the IR, and the ratio of the anomaly with photons and gluons for any axion is fixed by unification. This implies that there is a single axion, the QCD axion, with an anomalous coupling to photons. Other light axion-like particles can couple to photons by mixing through the QCD axion portal and lie to the right of the QCD line in the mass-coupling plane. Axions which break the unification relation between gluon and photon couplings are necessarily charged under the GUT gauge group and become heavy from perturbative mass contributions. A discovery of an axion to the left of the QCD line can rule out simple Grand Unified models. Axion searches are therefore tabletop and astrophysical probes of Grand Unification. |
| first_indexed | 2024-04-11T07:26:02Z |
| format | Article |
| id | doaj.art-034422b2b9dd4f9f8cd3aef06689c0d4 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-04-11T07:26:02Z |
| publishDate | 2022-10-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-034422b2b9dd4f9f8cd3aef06689c0d42022-12-22T04:37:03ZengSpringerOpenJournal of High Energy Physics1029-84792022-10-0120221013510.1007/JHEP10(2022)141Axion couplings in grand unified theoriesPrateek Agrawal0Michael Nee1Mario Reig2Rudolf Peierls Centre for Theoretical Physics, University of OxfordRudolf Peierls Centre for Theoretical Physics, University of OxfordRudolf Peierls Centre for Theoretical Physics, University of OxfordAbstract We show that the couplings of axions to gauge bosons are highly restricted in Grand Unified Theories where the standard model is embedded in a simple 4D gauge group. The topological nature of these couplings allows them to be matched from the UV to the IR, and the ratio of the anomaly with photons and gluons for any axion is fixed by unification. This implies that there is a single axion, the QCD axion, with an anomalous coupling to photons. Other light axion-like particles can couple to photons by mixing through the QCD axion portal and lie to the right of the QCD line in the mass-coupling plane. Axions which break the unification relation between gluon and photon couplings are necessarily charged under the GUT gauge group and become heavy from perturbative mass contributions. A discovery of an axion to the left of the QCD line can rule out simple Grand Unified models. Axion searches are therefore tabletop and astrophysical probes of Grand Unification.https://doi.org/10.1007/JHEP10(2022)141Axions and ALPsGrand Unification |
| spellingShingle | Prateek Agrawal Michael Nee Mario Reig Axion couplings in grand unified theories Journal of High Energy Physics Axions and ALPs Grand Unification |
| title | Axion couplings in grand unified theories |
| title_full | Axion couplings in grand unified theories |
| title_fullStr | Axion couplings in grand unified theories |
| title_full_unstemmed | Axion couplings in grand unified theories |
| title_short | Axion couplings in grand unified theories |
| title_sort | axion couplings in grand unified theories |
| topic | Axions and ALPs Grand Unification |
| url | https://doi.org/10.1007/JHEP10(2022)141 |
| work_keys_str_mv | AT prateekagrawal axioncouplingsingrandunifiedtheories AT michaelnee axioncouplingsingrandunifiedtheories AT marioreig axioncouplingsingrandunifiedtheories |