Speaker
Prof.
Fedor Simkovic
(Comenius University and JINR Dubna)
Description
The present-day results of the calculation of the 0νββ-decay nuclear matrix elements are discussed. The progress in the calculation of the double beta decay NMES within the QRPA is presented. A connection between the 2νββ-decay and 0νββ-decay matrix elements is analyzed. An impact of the quenching of the axial-vector coupling constant on double-beta decay processes is investigated and a novel approach to determine the quenched value of axial-vector coupling constant is proposed. The question is addressed whether light and heavy neutrino contributions to 0νββ-decay are experimentally distinguishable. In that context the “interpolating formula” for the 0νββ-decay is revisited. Several simplified benchmark scenarios within left-right symmetric models are considered and the conditions for the dominance of the light or heavy neutrino mass mechanisms are analyzed
Author
Prof.
Fedor Simkovic
(Comenius University and JINR Dubna)