Radiative neutrino masses from order-4 CP symmetry
Abstract Generalized CP symmetry of order 4 (CP4) is surprisingly powerful in shaping scalar and quark sectors of multi-Higgs models. Here, we extend this framework to the neutrino sector. We build two simple Majorana neutrino mass models with unbroken CP4, which are analogous to Ma’s scotogenic mod...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-02-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | http://link.springer.com/article/10.1007/JHEP02(2018)025 |
| _version_ | 1828846420834123776 |
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| author | Igor P. Ivanov |
| author_facet | Igor P. Ivanov |
| author_sort | Igor P. Ivanov |
| collection | DOAJ |
| description | Abstract Generalized CP symmetry of order 4 (CP4) is surprisingly powerful in shaping scalar and quark sectors of multi-Higgs models. Here, we extend this framework to the neutrino sector. We build two simple Majorana neutrino mass models with unbroken CP4, which are analogous to Ma’s scotogenic model. Both models use three Higgs doublets and two or three right-handed (RH) neutrinos. The minimal CP4 symmetric scotogenic model uses only two RH neutrinos, leads to three non-zero light neutrino masses, and contains a built-in mechanism to further suppress them via phase alignment. With three RH neutrinos, one generates a type I seesaw mass matrix of rank 1, which is then corrected by the same scotogenic mechanism, naturally leading to two neutrino mass scales with mild hierarchy. These minimal CP4-based constructions emerge as a primer for introducing additional symmetry structures and exploring their phenomenological consequences. |
| first_indexed | 2024-12-12T21:48:35Z |
| format | Article |
| id | doaj.art-336e3ee9cb944e02acfea2aecee020cb |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-12T21:48:35Z |
| publishDate | 2018-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-336e3ee9cb944e02acfea2aecee020cb2022-12-22T00:10:51ZengSpringerOpenJournal of High Energy Physics1029-84792018-02-012018211310.1007/JHEP02(2018)025Radiative neutrino masses from order-4 CP symmetryIgor P. Ivanov0CFTP, Instituto Superior Técnico, Universidade de LisboaAbstract Generalized CP symmetry of order 4 (CP4) is surprisingly powerful in shaping scalar and quark sectors of multi-Higgs models. Here, we extend this framework to the neutrino sector. We build two simple Majorana neutrino mass models with unbroken CP4, which are analogous to Ma’s scotogenic model. Both models use three Higgs doublets and two or three right-handed (RH) neutrinos. The minimal CP4 symmetric scotogenic model uses only two RH neutrinos, leads to three non-zero light neutrino masses, and contains a built-in mechanism to further suppress them via phase alignment. With three RH neutrinos, one generates a type I seesaw mass matrix of rank 1, which is then corrected by the same scotogenic mechanism, naturally leading to two neutrino mass scales with mild hierarchy. These minimal CP4-based constructions emerge as a primer for introducing additional symmetry structures and exploring their phenomenological consequences.http://link.springer.com/article/10.1007/JHEP02(2018)025Discrete SymmetriesNeutrino PhysicsBeyond Standard Model |
| spellingShingle | Igor P. Ivanov Radiative neutrino masses from order-4 CP symmetry Journal of High Energy Physics Discrete Symmetries Neutrino Physics Beyond Standard Model |
| title | Radiative neutrino masses from order-4 CP symmetry |
| title_full | Radiative neutrino masses from order-4 CP symmetry |
| title_fullStr | Radiative neutrino masses from order-4 CP symmetry |
| title_full_unstemmed | Radiative neutrino masses from order-4 CP symmetry |
| title_short | Radiative neutrino masses from order-4 CP symmetry |
| title_sort | radiative neutrino masses from order 4 cp symmetry |
| topic | Discrete Symmetries Neutrino Physics Beyond Standard Model |
| url | http://link.springer.com/article/10.1007/JHEP02(2018)025 |
| work_keys_str_mv | AT igorpivanov radiativeneutrinomassesfromorder4cpsymmetry |