Neutrinoless double beta decay studied with configuration mixing methods

TL;DR

This paper investigates neutrinoless double beta decay using advanced nuclear structure methods to accurately compute nuclear matrix elements, emphasizing the effects of deformation, pairing, and configuration mixing.

Contribution

It introduces the use of GCM+PNAMP methods for calculating NMEs, providing a detailed analysis of deformation and pairing effects in decay processes.

Findings

Deformation significantly influences NME calculations.

Configuration mixing impacts the accuracy of decay rate predictions.

GCM+PNAMP offers a reliable framework for nuclear matrix element evaluation.

Abstract

We study neutrinoless double beta decay of several isotopes with state-of-the-art beyond self-consistent mean field methods to compute the nuclear matrix elements (NME). Generating coordinate method with particle number and angular momentum projection (GCM+PNAMP) is used for finding mother and granddaughter states and evaluating transition operators between different nuclei. We analyze explicitly the role of the deformation, pairing and configuration mixing in the evaluation of the NME.