The electric dipole moment in a model for neutrino mass, dark matter and baryon asymmetry of the Universe
Abstract The electric dipole moment is examined in a three-loop neutrino mass model with dark matter originally proposed in Aoki et al. [Phys. Rev. Lett. 102 (2009) 051805]. The model contains a CP-violating phase in the Higgs potential which plays an important role in electroweak baryogenesis and i...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2025-06-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP06(2025)036 |
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| Summary: | Abstract The electric dipole moment is examined in a three-loop neutrino mass model with dark matter originally proposed in Aoki et al. [Phys. Rev. Lett. 102 (2009) 051805]. The model contains a CP-violating phase in the Higgs potential which plays an important role in electroweak baryogenesis and is thus expected to explain the baryon asymmetry of the Universe simultaneously. However, such a CP-violating phase is severely constrained by the measurements of the electron electric dipole moment (eEDM), and a suppression mechanism for the eEDM is necessary to explain the observed baryon asymmetry while avoiding the constraint. In this paper, we examine neutrino mass, lepton-flavor-violating processes, dark matter, and the eEDM in the model. We show that the eEDM can be suppressed by destructive interference between the CP-violating phases in the Higgs sector and the dark sector with large CP-violating phases. We propose some benchmark scenarios including O(1) CP-violating phases where tiny neutrino mass and dark matter can be explained while avoiding all current experimental and theoretical constraints. These CP-violating phases are expected to be large enough to generate the observed baryon asymmetry in the electroweak baryogenesis scenario. |
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| ISSN: | 1029-8479 |