Small Neutrino Masses from a Decoupled Singlet Scalar Field
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866913630863228928 |
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| author | Kim, Jongkuk Kim, Seong-Sik Lee, Hyun Min Padhan, Rojalin |
| author_facet | Kim, Jongkuk Kim, Seong-Sik Lee, Hyun Min Padhan, Rojalin |
| contents | We propose a unified solution with $Z_4$ discrete symmetry for small neutrino masses and stability of dark matter. The Standard Model is extended with an inert doublet scalar, a dark singlet scalar, a spurion scalar and right-handed neutrinos, which all transform nontrivially under $Z_4$. After the $Z_4$ symmetry is broken to $Z_2$ by the VEV of the spurion, much below the mass scale of the dark singlet scalar, a small lepton number violating coupling for the inert doublet is generated at tree level, so small neutrino masses are obtained at one-loops for relatively light new fields. We discuss the important roles of the $Z_4$ symmetry for neutrino masses, dark matter physics and thermal leptogenesis. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_13595 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Small Neutrino Masses from a Decoupled Singlet Scalar Field Kim, Jongkuk Kim, Seong-Sik Lee, Hyun Min Padhan, Rojalin High Energy Physics - Phenomenology We propose a unified solution with $Z_4$ discrete symmetry for small neutrino masses and stability of dark matter. The Standard Model is extended with an inert doublet scalar, a dark singlet scalar, a spurion scalar and right-handed neutrinos, which all transform nontrivially under $Z_4$. After the $Z_4$ symmetry is broken to $Z_2$ by the VEV of the spurion, much below the mass scale of the dark singlet scalar, a small lepton number violating coupling for the inert doublet is generated at tree level, so small neutrino masses are obtained at one-loops for relatively light new fields. We discuss the important roles of the $Z_4$ symmetry for neutrino masses, dark matter physics and thermal leptogenesis. |
| title | Small Neutrino Masses from a Decoupled Singlet Scalar Field |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2407.13595 |