Systematic study of nuclear matrix elements in neutrinoless double- β decay with a beyond-mean-field covariant density functional theory

J. M. Yao, L. S. Song, K. Hagino, P. Ring, J. Meng

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78 Citations (Scopus)

Abstract

We report a systematic study of nuclear matrix elements (NMEs) in neutrinoless double-β decays with a state-of-the-art beyond-mean-field covariant density functional theory. The dynamic effects of particle-number and angular-momentum conservations as well as quadrupole shape fluctuations are taken into account with projections and generator coordinate method for both initial and final nuclei. The full relativistic transition operator is adopted to calculate the NMEs. The present systematic studies show that in most of the cases there is a much better agreement with the previous nonrelativistic calculation based on the Gogny force than in the case of the nucleus Nd150 found by Song et al. [Phys. Rev. C 90, 054309 (2014)PRVCAN0556-281310.1103/PhysRevC.90.054309]. In particular, we find that the total NMEs can be well approximated by the pure axial-vector coupling term with a considerable reduction of the computational effort.

Original languageEnglish
Article number024316
JournalPhysical Review C - Nuclear Physics
Volume91
Issue number2
DOIs
Publication statusPublished - 2015 Feb 18

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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