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Radiative type-I seesaw neutrino masses
Journal
Physical Review D
ISSN
2470-0029
Date Issued
2019-12-09
Abstract
We discuss a radiative type-I seesaw. In these models, the radiative generation of Dirac neutrino
masses allows to explain the smallness of the observed neutrino mass scale for rather light right-handed
neutrino masses in a type-I seesaw. We first present the general idea in a model independent way. This
allows us to estimate the typical scale of right-handed neutrino mass as a function of the number of
loops. We then present two example models, one at one-loop and another one at two-loop, in which
we discuss neutrino masses and lepton flavour violating constraints in more detail. For the two-loop
example, right-handed neutrino masses must lie below 100 GeV, thus making this class of models
testable in heavy neutral lepton searches.
masses allows to explain the smallness of the observed neutrino mass scale for rather light right-handed
neutrino masses in a type-I seesaw. We first present the general idea in a model independent way. This
allows us to estimate the typical scale of right-handed neutrino mass as a function of the number of
loops. We then present two example models, one at one-loop and another one at two-loop, in which
we discuss neutrino masses and lepton flavour violating constraints in more detail. For the two-loop
example, right-handed neutrino masses must lie below 100 GeV, thus making this class of models
testable in heavy neutral lepton searches.
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