https://doi.org/10.1051/epjconf/201819402002
Two neutrino double-beta decay and effective axial-vector coupling constant
1
Comenius University, Mlynská dolina F1, SK-842 48 Bratislava, Slovakia
2
Dzhelepov Laboratory of Nuclear Problems, JINR, 141980 Dubna, Russia
3
Bogoliubov Laboratory of Theoretical Physics, JINR, 141980 Dubna, Russia
4
Czech Technical University in Prague, 128-00 Prague, Czech Republic
* e-mail: simkovic@fmph.uniba.sk
** e-mail: rastonator@gmail.com
*** e-mail: dus.stefanik@gmail.com
Published online: 14 November 2018
The theoretical and experimental study of the two-neutrino double-beta decay (2νββ-decay) is of crucial importance for reliable calculation of matrix elements governing the neutrinoless double-beta decay (0νββ-decay). That will allow to determine masses of neutrinos once the 0νββ-decay, which occurs if the neutrino is a massive Majorana particle and the total lepton number is not onserved, will be observed. Experiments studying the 2νββ-decay are currently approaching a qualitatively new level, where high-precision measurements are performed not only for half-lives but for all other observables of the process. In this context an improved formula for the 2νββ-decay is presented. Further, a novel approach for determining the effective axial-vector coupling constant is proposed.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
