Unified origin of axion and monopole dark matter, and solution to the domain-wall problem
We propose a scenario in which the spontaneous breakdown of the Peccei-Quinn symmetry leads to monopole production. Both the axion and the monopole contribute to dark matter, and the Witten effect on the axion mass is a built-in feature. In the Kim-Shifman-Vainshtein-Zakharov-type axion model, seemi...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2018
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| Online Access: | http://hdl.handle.net/1721.1/117767 |
| _version_ | 1826201261714702336 |
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| author | Sato, Ryosuke Takahashi, Fuminobu Yamada, Masaki |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Sato, Ryosuke Takahashi, Fuminobu Yamada, Masaki |
| author_sort | Sato, Ryosuke |
| collection | MIT |
| description | We propose a scenario in which the spontaneous breakdown of the Peccei-Quinn symmetry leads to monopole production. Both the axion and the monopole contribute to dark matter, and the Witten effect on the axion mass is a built-in feature. In the Kim-Shifman-Vainshtein-Zakharov-type axion model, seemingly different vacua are actually connected by the hidden gauge symmetry, which makes the axionic string unstable and separate into two Alice strings. The Alice string is attached to a single domain wall due to the QCD instanton effect, solving the domain-wall problem. This is in the same spirit of the Lazarides-Shafi mechanism, although the discrete Peccei-Quinn symmetry is not embedded into the center of the original gauge symmetry. In the Dine-Fischler-Srednicki-Zhitnitsky-type axion model, the domain-wall problem is avoided by the Witten effect. If the Peccei-Quinn symmetry is explicitly broken by a small amount, monopoles acquire a tiny electric charge and become minicharged dark matter. Interestingly, the quality of the Peccei-Quinn symmetry is closely tied to darkness of dark matter. |
| first_indexed | 2024-09-23T11:49:16Z |
| format | Article |
| id | mit-1721.1/117767 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T11:49:16Z |
| publishDate | 2018 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1177672022-10-01T06:15:18Z Unified origin of axion and monopole dark matter, and solution to the domain-wall problem Sato, Ryosuke Takahashi, Fuminobu Yamada, Masaki Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Takahashi, Fuminobu We propose a scenario in which the spontaneous breakdown of the Peccei-Quinn symmetry leads to monopole production. Both the axion and the monopole contribute to dark matter, and the Witten effect on the axion mass is a built-in feature. In the Kim-Shifman-Vainshtein-Zakharov-type axion model, seemingly different vacua are actually connected by the hidden gauge symmetry, which makes the axionic string unstable and separate into two Alice strings. The Alice string is attached to a single domain wall due to the QCD instanton effect, solving the domain-wall problem. This is in the same spirit of the Lazarides-Shafi mechanism, although the discrete Peccei-Quinn symmetry is not embedded into the center of the original gauge symmetry. In the Dine-Fischler-Srednicki-Zhitnitsky-type axion model, the domain-wall problem is avoided by the Witten effect. If the Peccei-Quinn symmetry is explicitly broken by a small amount, monopoles acquire a tiny electric charge and become minicharged dark matter. Interestingly, the quality of the Peccei-Quinn symmetry is closely tied to darkness of dark matter. 2018-09-14T19:05:06Z 2018-09-14T19:05:06Z 2018-08 2018-06 2018-08-28T18:00:22Z Article http://purl.org/eprint/type/JournalArticle 2470-0010 2470-0029 http://hdl.handle.net/1721.1/117767 Sato, Ryosuke et al. "Unified origin of axion and monopole dark matter, and solution to the domain-wall problem." Physical Review D 98, 4 (August 2018): 043535 en http://dx.doi.org/10.1103/PhysRevD.98.043535 Physical Review D Creative Commons Attribution http://creativecommons.org/licenses/by/3.0 application/pdf American Physical Society American Physical Society |
| spellingShingle | Sato, Ryosuke Takahashi, Fuminobu Yamada, Masaki Unified origin of axion and monopole dark matter, and solution to the domain-wall problem |
| title | Unified origin of axion and monopole dark matter, and solution to the domain-wall problem |
| title_full | Unified origin of axion and monopole dark matter, and solution to the domain-wall problem |
| title_fullStr | Unified origin of axion and monopole dark matter, and solution to the domain-wall problem |
| title_full_unstemmed | Unified origin of axion and monopole dark matter, and solution to the domain-wall problem |
| title_short | Unified origin of axion and monopole dark matter, and solution to the domain-wall problem |
| title_sort | unified origin of axion and monopole dark matter and solution to the domain wall problem |
| url | http://hdl.handle.net/1721.1/117767 |
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