General parametrization of Majorana neutrino mass models

TL;DR

This paper introduces a universal parametrization method for Majorana neutrino mass models that enables fitting experimental data while maintaining flexibility for exploring other model predictions.

Contribution

It provides a general formula and proof for a master parametrization applicable to various neutrino mass models, facilitating comprehensive parameter scans.

Findings

The parametrization reproduces experimental neutrino data accurately.

It applies to multiple well-known neutrino mass models.

Special cases with additional Yukawa coupling conditions are discussed.

Abstract

We discuss a general formula which allows to automatically reproduce experimental data for Majorana neutrino mass models, while keeping the complete set of the remaining model parameters free for general scans, as necessary in order to provide reliable predictions for observables outside the neutrino sector. We provide a proof of this master parametrization and show how to apply it for several well-known neutrino mass models from the literature. We also discuss a list of special cases, in which the Yukawa couplings have to fulfill some particular additional conditions.