The 0nbb-decay nuclear matrix elements with self-consistent short-range correlations

TL;DR

This paper presents a self-consistent calculation of nuclear matrix elements for neutrinoless double beta decay using modern nucleon-nucleon potentials, highlighting differences from traditional methods and analyzing uncertainties.

Contribution

It introduces a novel self-consistent approach deriving all interactions from the same realistic potentials within the RQRPA framework.

Findings

Matrix elements are larger with traditional Jastrow correlations.

Differences among various correlation methods are quantified.

Uncertainties in matrix elements are systematically analyzed.

Abstract

A self-consistent calculation of nuclear matrix elements of the neutrinoless double beta decays (0nbb) of 76Ge, 82Se, 96Zr, 100Mo, 116Cd, 128Te, 130Te and 130Xe is presented in the framework of the renormalized quasiparticle random phase approximation (RQRPA) and the standard QRPA. The pairing and residual interactions as well as the two-nucleon short-range correlations are for the first time derived from the same modern realistic nucleon-nucleon potentials, namely from charge-dependent Bonn potential (CD-Bonn) and the Argonne V18 potential. In a comparison with the traditional approach of using the Miller-Spencer Jastrow correlations matrix elements for the 0nbb-decay are obtained, which are larger in magnitude. We analyze the differences among various two-nucleon correlations including those of the unitary correlation operator method (UCOM) and quantify the uncertainties in the calculated 0nbb-decay matrix elements.