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arXiv · 1910.04178

Radiative type-I seesaw neutrino masses

Carolina Arbeláez·A. E. Cárcamo Hernández·Ricardo Cepedello·Martin Hirsch·Sergey Kovalenko
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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.

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Carolina Arbeláez, A. E. Cárcamo Hernández, Ricardo Cepedello, Martin Hirsch, Sergey Kovalenko. 2019-10-09. Radiative type-I seesaw neutrino masses. https://doi.org/10.1103/physrevd.100.115021

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