Gravitational waves from a scotogenic two-loop neutrino mass model
| Autor: | Bonilla, Cesar, Hernández, A. E. Cárcamo, Gonçalves, João, N., Vishnudath K., Morais, António P., Pasechnik, Roman |
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| Rok vydání: | 2023 |
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| Druh dokumentu: | Working Paper |
| Popis: | We propose a framework to account for neutrino masses at the two-loop level. This mechanism introduces new scalars and Majorana fermions to the Standard Model. It is assumed the existence of a global $\mathrm{U(1)\times \mathcal{Z}_2}$ symmetry which after partial breaking provides the stability of the dark matter candidates of the theory. The rich structure of the potential allows for the possibility of first-order phase transitions (FOPTs) in the early Universe which can lead to the generation of primordial gravitational waves as one of the potentially observable signatures of this model. Taking into account relevant constraints from lepton flavour violation, neutrino physics as well as the trilinear Higgs couplings at next-to-leading order accuracy, we have found a wide range of possible FOPTs which are strong enough to be probed at the proposed gravitational-wave interferometer experiments such as LISA. Comment: 24 pages; 7 figures; 2 tables. v2: Additional references; v3: Missing interactions added. Extended dark matter analysis and additional discussion added; v4: Extended discussion and additional clarifications. Matches version to be published in PRD; v5: Final version. Miscellaneous changes (affliations and funding information) |
| Databáze: | arXiv |
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