Axion couplings in heterotic string theory
We study the coupling of axions to gauge bosons in heterotic string theory. The axion-gauge boson couplings in the low energy 4d theory are derived by matching mixed anomalies between higher-form global symmetries and the zero-form gauge symmetry in the 10d theory. When the standard model gauge grou...
| Main Authors: | , , |
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| Formato: | Journal article |
| Idioma: | English |
| Publicado em: |
Springer
2025
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| _version_ | 1826317705993519104 |
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| author | Agrawal, P Nee, M Reig, M |
| author_facet | Agrawal, P Nee, M Reig, M |
| author_sort | Agrawal, P |
| collection | OXFORD |
| description | We study the coupling of axions to gauge bosons in heterotic string theory. The axion-gauge boson couplings in the low energy 4d theory are derived by matching mixed anomalies between higher-form global symmetries and the zero-form gauge symmetry in the 10d theory. When the standard model gauge group is embedded in a single simple group in the 10d theory — as is the case for almost all heterotic models studied in the literature — the ratio of the axion-photon coupling to the axion mass is bounded above by the QCD line. This bound is relevant for a large number of axion searches which have sensitivity to axion parameter space above this line. The discovery of an axion in these searches will rule out a large class of heterotic models, making such a signal challenging to explain within heterotic string theory. |
| first_indexed | 2025-03-11T16:58:09Z |
| format | Journal article |
| id | oxford-uuid:6e425fa6-f729-4bfd-85bd-f2ee005d3777 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2025-03-11T16:58:09Z |
| publishDate | 2025 |
| publisher | Springer |
| record_format | dspace |
| spelling | oxford-uuid:6e425fa6-f729-4bfd-85bd-f2ee005d37772025-02-28T20:08:03ZAxion couplings in heterotic string theoryJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:6e425fa6-f729-4bfd-85bd-f2ee005d3777EnglishJisc Publications RouterSpringer2025Agrawal, PNee, MReig, MWe study the coupling of axions to gauge bosons in heterotic string theory. The axion-gauge boson couplings in the low energy 4d theory are derived by matching mixed anomalies between higher-form global symmetries and the zero-form gauge symmetry in the 10d theory. When the standard model gauge group is embedded in a single simple group in the 10d theory — as is the case for almost all heterotic models studied in the literature — the ratio of the axion-photon coupling to the axion mass is bounded above by the QCD line. This bound is relevant for a large number of axion searches which have sensitivity to axion parameter space above this line. The discovery of an axion in these searches will rule out a large class of heterotic models, making such a signal challenging to explain within heterotic string theory. |
| spellingShingle | Agrawal, P Nee, M Reig, M Axion couplings in heterotic string theory |
| title | Axion couplings in heterotic string theory |
| title_full | Axion couplings in heterotic string theory |
| title_fullStr | Axion couplings in heterotic string theory |
| title_full_unstemmed | Axion couplings in heterotic string theory |
| title_short | Axion couplings in heterotic string theory |
| title_sort | axion couplings in heterotic string theory |
| work_keys_str_mv | AT agrawalp axioncouplingsinheteroticstringtheory AT neem axioncouplingsinheteroticstringtheory AT reigm axioncouplingsinheteroticstringtheory |