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Title: Neutrinoless double-beta decay in covariant density functional theory

We use covariant density functional theory beyond mean field in order to describe neutrinoless double-beta decay in a fully relativistic way. The dynamic effects of particle-number and angular-momentum conservations as well as shape fluctuations of quadrupole character are taken into account within the generator coordinate method for both initial and final nuclei. The calculations are based on the full relativistic transition operator. The nuclear matrix elements (NME’s) for a large number of possible transitions are investigated. The results are compared with various non-relativistic calculations, in particular also with the density functional theory based on the Gogny force. We find that the non-relativistic approximation is justified and that the total NME’s can be well approximated by the pure axial-vector coupling term. This corresponds to a considerable reduction of the computational effort.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [4] ;  [3] ;  [4] ;  [2] ;  [5]
  1. Physik-Department der Technischen Universität München, D-85748 Garching (Germany)
  2. (China)
  3. Department of Physics, Tohoku University, Sendai 980-8578 (Japan)
  4. State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking Univ., Beijing 100871 (China)
  5. (South Africa)
Publication Date:
OSTI Identifier:
22492478
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1681; Journal Issue: 1; Conference: Nuclear Structure and Dynamics '15: 3. international nuclear physics conference on nuclear structure and dynamics, Portoroz (Slovenia), 14-19 Jun 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANGULAR MOMENTUM; APPROXIMATIONS; COMPARATIVE EVALUATIONS; DENSITY FUNCTIONAL METHOD; DOUBLE BETA DECAY; FLUCTUATIONS; GENERATOR-COORDINATE METHOD; MEAN-FIELD THEORY; NUCLEAR MATRIX; NUCLEI; RELATIVISTIC RANGE; VECTORS