A Simple Realization of the Inverse Seesaw Mechanism

TL;DR

This paper demonstrates how the inverse seesaw mechanism can be naturally realized within the 3-3-1 model with right-handed neutrinos, providing insights into neutrino mass generation and lepton flavor violation.

Contribution

It introduces a simple framework using the 3-3-1 model to implement the inverse seesaw mechanism, addressing the smallness of the $5$ parameter and estimating related lepton flavor violation rates.

Findings

The inverse seesaw mechanism can be embedded in the 3-3-1 model.

The smallness of the $5$ parameter is explained within this framework.

Predicted branching ratio for $0 ightarrow e0 ightarrow 0 ext{e} ext{e}$ is estimated.

Abstract

Differently from the canonical seesaw mechanism, which is grounded in grand unified theories, the inverse seesaw mechanism lacks a special framework that realizes it naturally. In this work we advocate that the 3-3-1 model with right-handed neutrinos has such an appropriate framework to accommodate the inverse seesaw mechanism. We also provide an explanation for the smallness of the $\mu$ parameter and estimate the branching ratio for the rare lepton flavor violation process $\mu \rightarrow e\gamma$.