Radiative neutrino masses and exotic right-handed neutrinos

TL;DR

This paper extends the Standard Model with multiple Higgs doublets and symmetries to generate neutrino masses radiatively, analyzing scalar spectra, leptonic mixing, and rare decays, including a supersymmetric version.

Contribution

It introduces a novel multi-Higgs extension with global B-L and Z2 symmetries, providing detailed mass spectra and phenomenological implications for neutrino masses and lepton flavor violation.

Findings

Scalar potential is stable and bounded from below.

Calculated scalar and lepton mass spectra consistent with observed mixing.

Model predicts effects on magnetic dipole moments and rare decays.

Abstract

We consider an extension of the standard electroweak model with three Higgs doublets and global $B-L$ and $\mathbb{Z}_2$ symmetries. Two of the scalar doublets are inert due to the $\mathbb{Z}_2$ symmetry. We calculated all the mass spectra in the scalar and lepton sectors and accommodate the leptonic mixing matrix as well. We also include an analysis of the scalar sector, showing that the potential is limited from below, and we obtain the masses of the scalar sector. Furthermore we consider the effects of the model on the anaomalous magnetic dipole of charged leptons and the $\mu\to e\gamma$ decay. We also present the SUSY version of the model with global $B-L$.