Anatomy of nuclear matrix elements for neutrinoless double-beta decay
Nuclear Theory
2008-11-26 v3
Abstract
We show that, within the Quasiparticle Random Phase Approximation (QRPA) and the renormalized QRPA (RQRPA) based on the Bonn CD nucleon-nucleon interaction, the competition between the pairing and the neutron-proton particle-particle and particle-hole interactions causes contributions to the neutrinoless double-beta decay matrix element to nearly vanish at internucleon distances of more than 2 or 3 fermis. As a result, the matrix element is more sensitive to short-range/high-momentum physics than one naively expects. We analyze various ways of treating that physics and quantify the uncertainty it produces in the matrix elements, with three different treatments of short-range correlations.
Keywords
Cite
@article{arxiv.0710.2055,
title = {Anatomy of nuclear matrix elements for neutrinoless double-beta decay},
author = {Fedor Simkovic and Amand Faessler and Vadim Rodin and Petr Vogel and Jonathan Engel},
journal= {arXiv preprint arXiv:0710.2055},
year = {2008}
}
Comments
Version to appear in Phys. Rev. C