A holographic perspective on the axion quality problem
Abstract The axion provides a compelling solution to the strong CP problem as well as a candidate for the dark matter of the universe. However, the axion solution relies on the spontaneous breaking of a global U(1)PQ symmetry, which is also explicitly violated by quantum gravity. To preserve the axi...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2020-01-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP01(2020)188 |
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| _version_ | 1823863470004633600 |
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| author | Peter Cox Tony Gherghetta Minh D. Nguyen |
| author_facet | Peter Cox Tony Gherghetta Minh D. Nguyen |
| author_sort | Peter Cox |
| collection | DOAJ |
| description | Abstract The axion provides a compelling solution to the strong CP problem as well as a candidate for the dark matter of the universe. However, the axion solution relies on the spontaneous breaking of a global U(1)PQ symmetry, which is also explicitly violated by quantum gravity. To preserve the axion solution, gravitational violations of the U(1)PQ symmetry must be suppressed to sufficiently high order. We present a simple, geometric solution of the axion quality problem by modelling the axion with a bulk complex scalar field in a slice of AdS5, where the U(1)PQ symmetry is spontaneously broken in the bulk but explicitly broken on the UV brane. By localising the axion field towards the IR brane, gravitational violations of the PQ symmetry on the UV brane are sufficiently sequestered. This geometric solution is holographically dual to 4D strong dynamics where the global U(1)PQ is an accidental symmetry to sufficiently high order. |
| format | Article |
| id | doaj-art-7eb18a4a84c5499ba2d82358f9d82c36 |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-7eb18a4a84c5499ba2d82358f9d82c362025-02-09T12:06:24ZengSpringerOpenJournal of High Energy Physics1029-84792020-01-012020112010.1007/JHEP01(2020)188A holographic perspective on the axion quality problemPeter Cox0Tony Gherghetta1Minh D. Nguyen2School of Physics, The University of MelbourneSchool of Physics and Astronomy, University of MinnesotaSchool of Physics and Astronomy, University of MinnesotaAbstract The axion provides a compelling solution to the strong CP problem as well as a candidate for the dark matter of the universe. However, the axion solution relies on the spontaneous breaking of a global U(1)PQ symmetry, which is also explicitly violated by quantum gravity. To preserve the axion solution, gravitational violations of the U(1)PQ symmetry must be suppressed to sufficiently high order. We present a simple, geometric solution of the axion quality problem by modelling the axion with a bulk complex scalar field in a slice of AdS5, where the U(1)PQ symmetry is spontaneously broken in the bulk but explicitly broken on the UV brane. By localising the axion field towards the IR brane, gravitational violations of the PQ symmetry on the UV brane are sufficiently sequestered. This geometric solution is holographically dual to 4D strong dynamics where the global U(1)PQ is an accidental symmetry to sufficiently high order.https://doi.org/10.1007/JHEP01(2020)188Beyond Standard ModelField Theories in Higher DimensionsGlobal Symmetries |
| spellingShingle | Peter Cox Tony Gherghetta Minh D. Nguyen A holographic perspective on the axion quality problem Journal of High Energy Physics Beyond Standard Model Field Theories in Higher Dimensions Global Symmetries |
| title | A holographic perspective on the axion quality problem |
| title_full | A holographic perspective on the axion quality problem |
| title_fullStr | A holographic perspective on the axion quality problem |
| title_full_unstemmed | A holographic perspective on the axion quality problem |
| title_short | A holographic perspective on the axion quality problem |
| title_sort | holographic perspective on the axion quality problem |
| topic | Beyond Standard Model Field Theories in Higher Dimensions Global Symmetries |
| url | https://doi.org/10.1007/JHEP01(2020)188 |
| work_keys_str_mv | AT petercox aholographicperspectiveontheaxionqualityproblem AT tonygherghetta aholographicperspectiveontheaxionqualityproblem AT minhdnguyen aholographicperspectiveontheaxionqualityproblem AT petercox holographicperspectiveontheaxionqualityproblem AT tonygherghetta holographicperspectiveontheaxionqualityproblem AT minhdnguyen holographicperspectiveontheaxionqualityproblem |