Neutrinoless double beta decay in the minimal type-I seesaw model: How the enhancement or cancellation happens?

TL;DR

This paper analyzes how right-handed neutrinos in the minimal type-I seesaw model can either enhance or cancel the effective neutrino mass in neutrinoless double beta decay, affecting experimental bounds.

Contribution

It provides a detailed analysis of the conditions under which RHNs cause enhancement or cancellation of the effective neutrino mass in neutrinoless double beta decay.

Findings

Both enhancement and cancellation effects are possible within the model.

Parameter space bounds can be derived from experimental effective neutrino mass measurements.

The nuclear matrix element dependence influences the neutrino mass contributions.

Abstract

We discuss the contribution of right-handed neutrinos (RHNs) to the effective neutrino mass of the neutrinoless double beta decay within the minimal type-I seesaw model using the intrinsic seesaw relation of neutrino mass and mixing parameters and the relative mass dependence of the nuclear matrix elements. In the viable parameter space, we find the possibilities of both the enhancement and cancellation to the effective neutrino mass from RHNs. The bounds on the parameter space of the RHNs can be determined with the effective neutrino mass extracted from neutrinoless double beta decay experiments.