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
Primary author
Prof.
Fedor Simkovic
(Comenius University and JINR Dubna)
