Benchmark neutrinoless double-beta decay matrix elements in a light nucleus
Abstract
We compute nuclear matrix elements of neutrinoless double-beta decay mediated by light Majorana-neutrino exchange in the A = 6 system. The goal is to benchmark two many-body approaches, the No-Core Shell Model and the Multi-Reference In-Medium Similarity Renormalization Group. We use the SRG-evolved chiral N3LO-EM500 potential for the nuclear interaction, and make the approximation that isospin is conserved. We compare the results of the two approaches as a function of the cutoff on the many-body basis space. Although differences are seen in the predicted nuclear radii, the ground-state energies and neutrinoless double-beta decay matrix elements produced by the two approaches show significant agreement. We discuss the implications for calculations in heavier nuclei.
Cite
@article{arxiv.1909.06501,
title = {Benchmark neutrinoless double-beta decay matrix elements in a light nucleus},
author = {R. A. M. Basili and J. M. Yao and J. Engel and H. Hergert and M. Lockner and P. Maris and J. P. Vary},
journal= {arXiv preprint arXiv:1909.06501},
year = {2020}
}
Comments
12 pages, 3 figures, 2 tables