Predictive Model for Radiatively Induced Neutrino Masses and Mixings with Dark Matter

TL;DR

This paper proposes a minimal extension to the standard model where a new scalar doublet generates small neutrino masses radiatively and provides a dark matter candidate, with testable predictions for particle physics experiments.

Contribution

It introduces a novel minimal model that explains neutrino masses and dark matter without heavy right-handed neutrinos, using a scalar doublet and three-loop radiative mechanisms.

Findings

Neutrino masses are generated at three-loop level.

The model predicts specific neutrino mixing angles.

Distinct signals for dark matter and collider experiments are expected.

Abstract

A minimal extension of the standard model to naturally generate small neutrino masses and provide a dark matter candidate is proposed. The dark matter particle is part of a new scalar doublet field that plays a crucial role in radiatively generating neutrino masses. The symmetry that stabilizes the dark matter also suppresses neutrino masses to appear first at three-loop level. Without the need of right-handed neutrinos or other very heavy new fields, this offers an attractive explanation of the hierarchy between the electroweak and neutrino mass scales. The model has distinct verifiable predictions for the neutrino masses, flavor mixing angles, colliders and dark matter signals.