Monodromic transparency of axion domain walls
Abstract We revisit the study of light interacting with QCD axion domain walls from the perspective of the non-linear axion coupling to photons, g a F F ~ $$ g(a)F\overset{\sim }{F} $$ , which encodes the effects related to the breaking of the axion shift symmetry including the well-known mixing wit...
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| Language: | English |
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SpringerOpen
2025-05-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP05(2025)013 |
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| author | Simone Blasi |
| author_facet | Simone Blasi |
| author_sort | Simone Blasi |
| collection | DOAJ |
| description | Abstract We revisit the study of light interacting with QCD axion domain walls from the perspective of the non-linear axion coupling to photons, g a F F ~ $$ g(a)F\overset{\sim }{F} $$ , which encodes the effects related to the breaking of the axion shift symmetry including the well-known mixing with meson states. As the axion makes an O $$ \mathcal{O} $$ (1) excursion of its fundamental period around strings and domain walls, the standard linear coupling to photons is generally insufficient to accurately describe the interaction of light with the defects, and one needs to consider the full structure of g(a). We take this into account in evaluating the friction experienced by axion domain walls moving in a thermal bath of photons, as well as in deriving the birefringent properties of the walls. This clarifies some results in the literature dealing with a special cancellation that takes place for the QCD axion with the electromagnetic and color anomaly as predicted by minimal Grand Unified Theories. |
| format | Article |
| id | doaj-art-4643a1205fbd497abe12f9f90122a8d7 |
| institution | DOAJ |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-4643a1205fbd497abe12f9f90122a8d72025-08-20T03:10:38ZengSpringerOpenJournal of High Energy Physics1029-84792025-05-012025512010.1007/JHEP05(2025)013Monodromic transparency of axion domain wallsSimone Blasi0Deutsches Elektronen-Synchrotron DESYAbstract We revisit the study of light interacting with QCD axion domain walls from the perspective of the non-linear axion coupling to photons, g a F F ~ $$ g(a)F\overset{\sim }{F} $$ , which encodes the effects related to the breaking of the axion shift symmetry including the well-known mixing with meson states. As the axion makes an O $$ \mathcal{O} $$ (1) excursion of its fundamental period around strings and domain walls, the standard linear coupling to photons is generally insufficient to accurately describe the interaction of light with the defects, and one needs to consider the full structure of g(a). We take this into account in evaluating the friction experienced by axion domain walls moving in a thermal bath of photons, as well as in deriving the birefringent properties of the walls. This clarifies some results in the literature dealing with a special cancellation that takes place for the QCD axion with the electromagnetic and color anomaly as predicted by minimal Grand Unified Theories.https://doi.org/10.1007/JHEP05(2025)013Axions and ALPsEarly Universe Particle Physics |
| spellingShingle | Simone Blasi Monodromic transparency of axion domain walls Journal of High Energy Physics Axions and ALPs Early Universe Particle Physics |
| title | Monodromic transparency of axion domain walls |
| title_full | Monodromic transparency of axion domain walls |
| title_fullStr | Monodromic transparency of axion domain walls |
| title_full_unstemmed | Monodromic transparency of axion domain walls |
| title_short | Monodromic transparency of axion domain walls |
| title_sort | monodromic transparency of axion domain walls |
| topic | Axions and ALPs Early Universe Particle Physics |
| url | https://doi.org/10.1007/JHEP05(2025)013 |
| work_keys_str_mv | AT simoneblasi monodromictransparencyofaxiondomainwalls |