Analysis of the Intermediate-State Contributions to Neutrinoless Double β− Decays
Hyvärinen, J., & Suhonen, J. (2016). Analysis of the Intermediate-State Contributions to Neutrinoless Double β− Decays. Advances in High Energy Physics, 2016, 4714829. doi:10.1155/2016/4714829
Published inAdvances in High Energy Physics
© 2016 J. Hyvarinen and J. Suhonen. This is an open access article distributed under the Creative Commons Attribution License. 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 (0]𝛽−𝛽−) decays to the 0+ ground and first excited states is performed in terms of the contributing multipole states in the intermediate nuclei of 0]𝛽−𝛽− 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 𝐺 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 𝑔pp.