Minimal Radiative Neutrino Mass Mechanism for Inverse Seesaw Models

TL;DR

This paper proposes a minimal one-loop radiative mechanism within inverse seesaw models that generates small Majorana neutrino masses directly linked to right-handed neutrino masses, avoiding new scalar or gauge fields.

Contribution

It introduces a novel, economical one-loop radiative neutrino mass generation mechanism directly proportional to right-handed Majorana masses in inverse seesaw models.

Findings

The mechanism produces small neutrino masses consistent with observations.

It does not require non-standard scalar or gauge fields.

The model simplifies the neutrino mass generation process.

Abstract

We study a minimal one-loop radiative mechanism for generating small Majorana neutrino masses in inverse seesaw extensions of the Standard Model with two singlet fermions per family. The new feature of this radiative mechanism is that the one-loop induced left-handed neutrino mass matrix is directly proportional to the Majorana mass matrix of the right-handed neutrinos. This is a very economical scenario without necessitating the existence of non-standard scalar or gauge fields.