Seesaw neutrino masses with a second Higgs doublet added

TL;DR

This paper explores an extended Standard Model with an additional Higgs doublet and right-handed neutrinos, demonstrating how one-loop corrections generate light neutrino masses consistent with oscillation data.

Contribution

It introduces a model combining a second Higgs doublet with right-handed neutrinos, analyzing neutrino mass generation via radiative corrections within the seesaw type-I framework.

Findings

Neutrino masses are generated through one-loop radiative corrections.

Model parameters are constrained by experimental neutrino oscillation data.

Both normal and inverted neutrino mass hierarchies are viable.

Abstract

We study parameters of an extended standard model. The neutrino sector is enlarged by one or two right-handed singlet fields and the Higgs sector contains one additional doublet. One-loop radiative corrections generate the mass for the light neutrino fields. The numerical analysis is performed varying the masses of heavy neutrinos and of the additional neutral Higgses. The parameters of the neutrino sector, allowing for the seesaw type-I mechanism, are restricted by experimental neutrino oscillation data. Both normal and inverted hierarchies of the light neutrino masses are discussed.