Neutrino masses and mixed dark matter from doublet and singlet scalars
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| Main Authors: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866909692316352512 |
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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 consider the extension of the Standard Model with an inert scalar doublet, three right-handed neutrinos, and singlet scalar fields, $φ$ and $S$. In this model, neutrino masses are zero in the limit of the unbroken $Z_4$ discrete symmetry. We show that when the singlet scalar field $φ$ gets a VEV, the $Z_4$ symmetry is broken to $Z_2$, and neutrino masses are generated at one-loops due to the mixings between the neutral components of the inert scalar doublet and the singlet scalar field $S$. There is a dark matter candidate from the lightest neutral scalar field, which is a mixture of the inert scalar doublet and the singlet scalar field $S$, in general. The $Z_4$ breaking mass terms are constrained by electroweak precision data and direct detection (DD) bounds for dark matter, favoring small mixings or almost degenerate masses for the DM scalars. As a result, we discuss the implications of the results for small neutrino masses and DD-safe dark matter. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_00121 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Neutrino masses and mixed dark matter from doublet and singlet scalars Kim, Jongkuk Kim, Seong-Sik Lee, Hyun Min Padhan, Rojalin High Energy Physics - Phenomenology We consider the extension of the Standard Model with an inert scalar doublet, three right-handed neutrinos, and singlet scalar fields, $φ$ and $S$. In this model, neutrino masses are zero in the limit of the unbroken $Z_4$ discrete symmetry. We show that when the singlet scalar field $φ$ gets a VEV, the $Z_4$ symmetry is broken to $Z_2$, and neutrino masses are generated at one-loops due to the mixings between the neutral components of the inert scalar doublet and the singlet scalar field $S$. There is a dark matter candidate from the lightest neutral scalar field, which is a mixture of the inert scalar doublet and the singlet scalar field $S$, in general. The $Z_4$ breaking mass terms are constrained by electroweak precision data and direct detection (DD) bounds for dark matter, favoring small mixings or almost degenerate masses for the DM scalars. As a result, we discuss the implications of the results for small neutrino masses and DD-safe dark matter. |
| title | Neutrino masses and mixed dark matter from doublet and singlet scalars |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2505.00121 |