Tri-direct CP in the Littlest Seesaw playground
Abstract We discuss spontaneously broken CP symmetry in two right-handed neutrino models based on the idea of having a different residual flavour symmetry, together with a different residual CP symmetry, associated with each of the two right-handed neutrinos. The charged lepton sector also has a dif...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-12-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP12(2018)003 |
| _version_ | 1828178305972436992 |
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| author | Gui-Jun Ding Stephen F. King Cai-Chang Li |
| author_facet | Gui-Jun Ding Stephen F. King Cai-Chang Li |
| author_sort | Gui-Jun Ding |
| collection | DOAJ |
| description | Abstract We discuss spontaneously broken CP symmetry in two right-handed neutrino models based on the idea of having a different residual flavour symmetry, together with a different residual CP symmetry, associated with each of the two right-handed neutrinos. The charged lepton sector also has a different residual flavour symmetry. In such a tri-direct CP approach, we show that the combination of the three residual flavour and two residual CP symmetries provides a new way of fixing the parameters. To illustrate the approach, we revisit the Littlest Seesaw (LSS) model based on S 4 and then propose new variants which have not so far appeared in the literature, with different predictions for each variant. We analyse numerically the predictions of the new variants, and then propose an explicit model which can realise one of the successful benchmark points, based on the atmospheric flavon vacuum alignment (1, ω 2, ω) and the solar flavon vacuum alignment (1, −7/2, −7/2). |
| first_indexed | 2024-04-12T05:14:08Z |
| format | Article |
| id | doaj.art-bd28c69a831d4d399d236dbce8d82f45 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-04-12T05:14:08Z |
| publishDate | 2018-12-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-bd28c69a831d4d399d236dbce8d82f452022-12-22T03:46:41ZengSpringerOpenJournal of High Energy Physics1029-84792018-12-0120181213210.1007/JHEP12(2018)003Tri-direct CP in the Littlest Seesaw playgroundGui-Jun Ding0Stephen F. King1Cai-Chang Li2Interdisciplinary Center for Theoretical Study and Department of Modern Physics, University of Science and Technology of ChinaPhysics and Astronomy, University of SouthamptonInterdisciplinary Center for Theoretical Study and Department of Modern Physics, University of Science and Technology of ChinaAbstract We discuss spontaneously broken CP symmetry in two right-handed neutrino models based on the idea of having a different residual flavour symmetry, together with a different residual CP symmetry, associated with each of the two right-handed neutrinos. The charged lepton sector also has a different residual flavour symmetry. In such a tri-direct CP approach, we show that the combination of the three residual flavour and two residual CP symmetries provides a new way of fixing the parameters. To illustrate the approach, we revisit the Littlest Seesaw (LSS) model based on S 4 and then propose new variants which have not so far appeared in the literature, with different predictions for each variant. We analyse numerically the predictions of the new variants, and then propose an explicit model which can realise one of the successful benchmark points, based on the atmospheric flavon vacuum alignment (1, ω 2, ω) and the solar flavon vacuum alignment (1, −7/2, −7/2).http://link.springer.com/article/10.1007/JHEP12(2018)003Discrete SymmetriesNeutrino Physics |
| spellingShingle | Gui-Jun Ding Stephen F. King Cai-Chang Li Tri-direct CP in the Littlest Seesaw playground Journal of High Energy Physics Discrete Symmetries Neutrino Physics |
| title | Tri-direct CP in the Littlest Seesaw playground |
| title_full | Tri-direct CP in the Littlest Seesaw playground |
| title_fullStr | Tri-direct CP in the Littlest Seesaw playground |
| title_full_unstemmed | Tri-direct CP in the Littlest Seesaw playground |
| title_short | Tri-direct CP in the Littlest Seesaw playground |
| title_sort | tri direct cp in the littlest seesaw playground |
| topic | Discrete Symmetries Neutrino Physics |
| url | http://link.springer.com/article/10.1007/JHEP12(2018)003 |
| work_keys_str_mv | AT guijunding tridirectcpinthelittlestseesawplayground AT stephenfking tridirectcpinthelittlestseesawplayground AT caichangli tridirectcpinthelittlestseesawplayground |