Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published May 2006 | public
Journal Article

Uncertainties in the 0νββ-decay nuclear matrix elements

Abstract

The nuclear matrix elements M^(0ν) of the neutrinoless double-beta decay (0νββ) of most nuclei with known 2νββ-decay rates are systematically evaluated using the Quasiparticle Random Phase Approximation (QRPA) and Renormalized QRPA (RQRPA). The experimental 2νββ-decay rate is used to adjust the most relevant parameter, the strength of the particle-particle interaction. With such procedure the M^(0ν) values become essentially independent of single-particle basis size, the axial vector quenching factor, etc. Theoretical arguments in favor of the adopted way of determining the interaction parameters are presented. It is suggested that most of the spread among the published M^(0ν)'s can be ascribed to the choices of implicit and explicit parameters, inherent to the QRPA method.

Additional Information

© 2006 Springer, Part of Springer Science+Business Media. Received 30 March 2006. The work of F. Š. and V. R. was supported in part by the Deutsche Forschungsgemeinschaft (grants 436 SLK 17/298, TU 7/134-1 and FA67/28-2, respectively). We thank also the EU ILIAS project under the contract RII3-CT-2004-506222. The work of P. V. was supported by the U.S. DOE, Stanford University, SLAC, and KIPAC.

Additional details

Created:
August 19, 2023
Modified:
October 23, 2023