Dai-Freed anomaly in the standard model and topological inflation
Abstract When we impose discrete symmetries in the standard model we have Dai-Freed global anomalies. However, interestingly if we introduce three right-handed neutrinos we can have an anomaly-free discrete Z 4 gauge symmetry. This Z 4 symmetry should be spontaneously broken down to the Z 2 symmetry...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-11-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP11(2023)106 |
| _version_ | 1827277333557411840 |
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| author | Masahiro Kawasaki Tsutomu T. Yanagida |
| author_facet | Masahiro Kawasaki Tsutomu T. Yanagida |
| author_sort | Masahiro Kawasaki |
| collection | DOAJ |
| description | Abstract When we impose discrete symmetries in the standard model we have Dai-Freed global anomalies. However, interestingly if we introduce three right-handed neutrinos we can have an anomaly-free discrete Z 4 gauge symmetry. This Z 4 symmetry should be spontaneously broken down to the Z 2 symmetry to generate the heavy Majorana masses for the right-handed neutrinos. We show that this symmetry breaking naturally generates topological inflation, which is consistent with the CMB observations at present and predicts a significant tensor mode with scalar-tensor ratio r > 0.03. The right-handed neutrinos play an important role in reheating processes. The reheating temperature is as high as ∼ 108 GeV, and non-thermal leptogenesis successfully takes place. |
| first_indexed | 2024-03-10T22:22:50Z |
| format | Article |
| id | doaj.art-0b067c03cbaf47ec81197381f7d0ed8f |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-04-24T07:19:10Z |
| publishDate | 2023-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-0b067c03cbaf47ec81197381f7d0ed8f2024-04-21T11:06:15ZengSpringerOpenJournal of High Energy Physics1029-84792023-11-0120231111010.1007/JHEP11(2023)106Dai-Freed anomaly in the standard model and topological inflationMasahiro Kawasaki0Tsutomu T. Yanagida1ICRR, University of TokyoTsung-Dao Lee Institute and School of Physics and Astronomy, Shanghai Jiao Tong UniversityAbstract When we impose discrete symmetries in the standard model we have Dai-Freed global anomalies. However, interestingly if we introduce three right-handed neutrinos we can have an anomaly-free discrete Z 4 gauge symmetry. This Z 4 symmetry should be spontaneously broken down to the Z 2 symmetry to generate the heavy Majorana masses for the right-handed neutrinos. We show that this symmetry breaking naturally generates topological inflation, which is consistent with the CMB observations at present and predicts a significant tensor mode with scalar-tensor ratio r > 0.03. The right-handed neutrinos play an important role in reheating processes. The reheating temperature is as high as ∼ 108 GeV, and non-thermal leptogenesis successfully takes place.https://doi.org/10.1007/JHEP11(2023)106Cosmology of Theories BSMBaryo-and LeptogenesisEarly Universe Particle PhysicsAnomalies in Field and String Theories |
| spellingShingle | Masahiro Kawasaki Tsutomu T. Yanagida Dai-Freed anomaly in the standard model and topological inflation Journal of High Energy Physics Cosmology of Theories BSM Baryo-and Leptogenesis Early Universe Particle Physics Anomalies in Field and String Theories |
| title | Dai-Freed anomaly in the standard model and topological inflation |
| title_full | Dai-Freed anomaly in the standard model and topological inflation |
| title_fullStr | Dai-Freed anomaly in the standard model and topological inflation |
| title_full_unstemmed | Dai-Freed anomaly in the standard model and topological inflation |
| title_short | Dai-Freed anomaly in the standard model and topological inflation |
| title_sort | dai freed anomaly in the standard model and topological inflation |
| topic | Cosmology of Theories BSM Baryo-and Leptogenesis Early Universe Particle Physics Anomalies in Field and String Theories |
| url | https://doi.org/10.1007/JHEP11(2023)106 |
| work_keys_str_mv | AT masahirokawasaki daifreedanomalyinthestandardmodelandtopologicalinflation AT tsutomutyanagida daifreedanomalyinthestandardmodelandtopologicalinflation |