Tracking the baryon junction in heavy-ion collisions

Double-beta decay (DBD) is an actively studied process due to its potential to provide insights into the nuclear structure of involved nuclei, the properties of neutrinos, and to test models beyond the Standard Model of particle physics. In my talk I will present new statistical methods for assessing the values and the uncertainties of the nuclear matrix elements for neutrinoless double beta decays, two neutrino double beta decays, two neutrino double electron capture, and neutrinoless double electron capture. The analyses are made within the traditional shell model approach. Examples for 48Ca, 82Se, 124Xe, and 136Xe will be provided.