Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 8, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP08(2020)067
Keywords
Beyond Standard Model; Neutrino Physics
Categories
Funding
- Spanish grant (MINECO/AEI/FEDER, UE) [FPA2017-85216-P]
- MINECO through the Ramon y Cajal contract [RYC2018-025795-I]
- Spanish grant (Generalitat Valenciana) [SEJI/2018/033, PROMETEO/2018/165]
- Spanish grant (Red Consolider MultiDark) [FPA2017-90566-REDC]
- [FPU15/03158]
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We study charged lepton flavor violation for the three most popular 3-loop Majorana neutrino mass models. We call these models minimal since their particle content correspond to the minimal sets for which genuine 3-loop models can be constructed. In all the three minimal models the neutrino mass matrix is proportional to some powers of Standard Model lepton masses, providing additional suppression factors on top of the expected loop suppression. To correctly explain neutrino masses, therefore large Yukawa couplings are needed in these models. We calculate charged lepton flavor violating observables and find that the three minimal models survive the current constraints only in very narrow regions of their parameter spaces.
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