Charged lepton flavor violating processes in the Grimus-Neufeld model
Abstract Charged Lepton Flavour Violating (cLFV) decays constrain the relationship between the neutrino and the scalar sectors of the Grimus-Neufeld model (GNM), an appealing minimal model of neutrino masses. It turns out, that in the scenario, where the seesaw scale is lower than the electroweak on...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2022-09-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP09(2022)174 |
| _version_ | 1811208745262252032 |
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| author | Vytautas Dūdėnas Thomas Gajdosik Uladzimir Khasianevich Wojciech Kotlarski Dominik Stöckinger |
| author_facet | Vytautas Dūdėnas Thomas Gajdosik Uladzimir Khasianevich Wojciech Kotlarski Dominik Stöckinger |
| author_sort | Vytautas Dūdėnas |
| collection | DOAJ |
| description | Abstract Charged Lepton Flavour Violating (cLFV) decays constrain the relationship between the neutrino and the scalar sectors of the Grimus-Neufeld model (GNM), an appealing minimal model of neutrino masses. It turns out, that in the scenario, where the seesaw scale is lower than the electroweak one, cLFV is completely defined by the new Yukawa interactions between the additional single heavy Majorana neutrino, the second Higgs doublet and the lepton doublets. Therefore, we derive a useful parameterization for the Yukawa couplings which reproduces by construction the correct PMNS matrix and the correct neutrino masses for both Normal and Inverted ordering at one-loop level. We embed this scenario in the FlexibleSUSY spectrum-generator generator to perform parameter scans. Focusing on the tiny seesaw scale, we show that current μ → eγ limits provide significant constraints on the scalar sector, and we evaluate the impact of future cLFV τ-decay searches for the cases of discovery or non-discovery. The tiny seesaw scale makes the neutrino sector and the cLFV processes in the GNM similar to the scotogenic and the scoto-seesaw models, so we provide constraints for these models as well. |
| first_indexed | 2024-04-12T04:27:50Z |
| format | Article |
| id | doaj.art-8f455260f8f344968851947e735274f1 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-04-12T04:27:50Z |
| publishDate | 2022-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-8f455260f8f344968851947e735274f12022-12-22T03:48:02ZengSpringerOpenJournal of High Energy Physics1029-84792022-09-012022913710.1007/JHEP09(2022)174Charged lepton flavor violating processes in the Grimus-Neufeld modelVytautas Dūdėnas0Thomas Gajdosik1Uladzimir Khasianevich2Wojciech Kotlarski3Dominik Stöckinger4Institute of Theoretical Physics and Astronomy, Faculty of Physics, Vilnius UniversityInstitute of Theoretical Physics and Astronomy, Faculty of Physics, Vilnius UniversityInstitut für Kern- und Teilchenphysik, TU DresdenNational Centre for Nuclear ResearchInstitut für Kern- und Teilchenphysik, TU DresdenAbstract Charged Lepton Flavour Violating (cLFV) decays constrain the relationship between the neutrino and the scalar sectors of the Grimus-Neufeld model (GNM), an appealing minimal model of neutrino masses. It turns out, that in the scenario, where the seesaw scale is lower than the electroweak one, cLFV is completely defined by the new Yukawa interactions between the additional single heavy Majorana neutrino, the second Higgs doublet and the lepton doublets. Therefore, we derive a useful parameterization for the Yukawa couplings which reproduces by construction the correct PMNS matrix and the correct neutrino masses for both Normal and Inverted ordering at one-loop level. We embed this scenario in the FlexibleSUSY spectrum-generator generator to perform parameter scans. Focusing on the tiny seesaw scale, we show that current μ → eγ limits provide significant constraints on the scalar sector, and we evaluate the impact of future cLFV τ-decay searches for the cases of discovery or non-discovery. The tiny seesaw scale makes the neutrino sector and the cLFV processes in the GNM similar to the scotogenic and the scoto-seesaw models, so we provide constraints for these models as well.https://doi.org/10.1007/JHEP09(2022)174Lepton Flavour Violation (charged)Specific BSM Phenomenology |
| spellingShingle | Vytautas Dūdėnas Thomas Gajdosik Uladzimir Khasianevich Wojciech Kotlarski Dominik Stöckinger Charged lepton flavor violating processes in the Grimus-Neufeld model Journal of High Energy Physics Lepton Flavour Violation (charged) Specific BSM Phenomenology |
| title | Charged lepton flavor violating processes in the Grimus-Neufeld model |
| title_full | Charged lepton flavor violating processes in the Grimus-Neufeld model |
| title_fullStr | Charged lepton flavor violating processes in the Grimus-Neufeld model |
| title_full_unstemmed | Charged lepton flavor violating processes in the Grimus-Neufeld model |
| title_short | Charged lepton flavor violating processes in the Grimus-Neufeld model |
| title_sort | charged lepton flavor violating processes in the grimus neufeld model |
| topic | Lepton Flavour Violation (charged) Specific BSM Phenomenology |
| url | https://doi.org/10.1007/JHEP09(2022)174 |
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