Neutrino mass mechanisms in 3-3-1 models: A short review

TL;DR

This review discusses how light neutrino masses can be generated within 3-3-1 gauge models, highlighting mechanisms compatible with the models' structure and energy constraints, including the inverse seesaw.

Contribution

It provides a comparative analysis of neutrino mass generation mechanisms in minimal and right-handed neutrino 3-3-1 models, emphasizing the natural fit of the inverse seesaw.

Findings

Light neutrinos require alternative mechanisms below 5 TeV.

In right-handed neutrino models, mechanisms generate both left- and right-handed neutrinos.

Inverse seesaw mechanism naturally fits within the 3-3-1 model with right-handed neutrinos.

Abstract

In this paper we review some mechanisms that provide light neutrinos in the framework of 3-3-1 gauge models without exotic leptons. In regard to the minimal 3-3-1 model, we call the attention to the fact that the perturbative regime of the model goes until 5 TeV. This requires alternative mechanisms in order to generate light neutrinos. In this review we discuss two mechanisms capable of generating light neutrinos in the framework of the minimal 3-3-1 model. In regard to the 3-3-1 model with right-handed neutrinos, we call the attention to the fact that in it mechanisms that generate light left-handed neutrinos also generate light right-handed neutrinos. Finally, we call the attention to the fact that the 3-3-1 model with right-handed neutrinos accommodate naturally the inverse seesaw mechanism.