Modular-symmetry-protected seesaw
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866908706536423424 |
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| author | Granelli, A. Meloni, D. Parriciatu, M. Penedo, J. T. Petcov, S. T. |
| author_facet | Granelli, A. Meloni, D. Parriciatu, M. Penedo, J. T. Petcov, S. T. |
| contents | In the presence of a finite modular flavour symmetry, fermion mass hierarchies may be generated by a slight deviation of the modulus from a symmetric point. We point out that this small parameter governing charged-lepton mass hierarchies may also be responsible for the breaking of lepton number in a symmetry-protected low-scale seesaw, sourcing active neutrino masses and the mass splitting of a pseudo-Dirac pair of heavy neutrinos. We discuss the phenomenological implications of this mechanism, including the possibility to test the considered models at future planned and proposed heavy neutral lepton searches. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_21405 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Modular-symmetry-protected seesaw Granelli, A. Meloni, D. Parriciatu, M. Penedo, J. T. Petcov, S. T. High Energy Physics - Phenomenology In the presence of a finite modular flavour symmetry, fermion mass hierarchies may be generated by a slight deviation of the modulus from a symmetric point. We point out that this small parameter governing charged-lepton mass hierarchies may also be responsible for the breaking of lepton number in a symmetry-protected low-scale seesaw, sourcing active neutrino masses and the mass splitting of a pseudo-Dirac pair of heavy neutrinos. We discuss the phenomenological implications of this mechanism, including the possibility to test the considered models at future planned and proposed heavy neutral lepton searches. |
| title | Modular-symmetry-protected seesaw |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2505.21405 |