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Advances in High Energy Physics
Volume 2016 (2016), Article ID 4714829, 13 pages
Research Article

Analysis of the Intermediate-State Contributions to Neutrinoless Double β Decays

Department of Physics, University of Jyvaskyla, P.O. Box 35, 40014 Jyvaskyla, Finland

Received 1 April 2016; Accepted 26 May 2016

Academic Editor: Luca Stanco

Copyright © 2016 Juhani Hyvärinen and Jouni Suhonen. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The publication of this article was funded by SCOAP3.


A comprehensive analysis of the structure of the nuclear matrix elements (NMEs) of neutrinoless double beta-minus () decays to the ground and first excited states is performed in terms of the contributing multipole states in the intermediate nuclei of transitions. We concentrate on the transitions mediated by the light (l-NMEs) Majorana neutrinos. As nuclear model we use the proton-neutron quasiparticle random-phase approximation (pnQRPA) with a realistic two-nucleon interaction based on the Bonn one-boson-exchange matrix. In the computations we include the appropriate short-range correlations, nucleon form factors, and higher-order nucleonic weak currents and restore the isospin symmetry by the isoscalar-isovector decomposition of the particle-particle proton-neutron interaction parameter .