Significant neutrinoless double beta decay with quasi-Dirac neutrinos

TL;DR

This paper explores how light quasi-Dirac neutrinos could produce observable neutrinoless double beta decay signals within a realistic model that links neutrino masses and decay processes to Peccei-Quinn symmetry breaking.

Contribution

It introduces a model where neutrinoless double beta decay and neutrino masses are simultaneously generated through Peccei-Quinn symmetry breaking, highlighting a novel connection.

Findings

Neutrinoless double beta decay can be significant with quasi-Dirac neutrinos.

The model links neutrino mass generation to Peccei-Quinn symmetry breaking.

Potential experimental signals consistent with the model are discussed.

Abstract

A significant signal of neutrinoless double beta decay can be consistent with the existence of light quasi-Dirac neutrinos. To demonstrate this possibility, we consider a realistic model where the neutrino masses and the neutrinoless double beta decay can be simultaneously generated after a Peccei-Quinn symmetry breaking.