Three-loop Neutrino Mass Model with Doubly Charged Particles from Iso-Doublets

TL;DR

This paper introduces a three-loop neutrino mass model with dark matter candidates, explaining small neutrino masses without super heavy particles and predicting distinctive collider signatures from doubly charged scalars.

Contribution

The model uniquely generates neutrino masses at three loops with TeV-scale particles and links to dark matter and muon g-2 anomaly explanations.

Findings

Neutrino masses explained without super heavy particles.

Doubly charged scalars produce distinctive collider signatures.

Muon g-2 anomaly can be explained by new particle loops.

Abstract

We propose a new type of a three-loop induced neutrino mass model with dark matter candidates which are required for the neutrino mass generation. The smallness of neutrino masses can be naturally explained without introducing super heavy particles, namely, much heavier than a TeV scale and quite small couplings as compared to the gauge couplings. We find that as a bonus, the anomaly of the muon anomalous magnetic moment can simultaneously be explained by loop effects of new particles. In our model, there are doubly charged scalar bosons and leptons from isospin doublet fields which give characteristic collider signatures. In particular, the doubly charged scalar bosons can decay into the same-sign dilepton with its chirality of both right-handed or left- and right-handed. This can be a smoking gun signature to identify our model and be useful to distinguish other models with doubly charged scalar bosons at collider experiments.