Speaker
Description
A big question in particle physics is whether neutrinos are Dirac or Majorana fermions. Apart from neutrinoless double beta decay ($0\nu\beta\beta$-decay), macroscopic neutrinoless double beta decay (MDBD) is one of the reactions whose observation implies the existence of Majorana neutrinos. MDBD is the longer version of $0\nu\beta\beta$-decay with regard to the interaction distance of neutrino exchange. One advantage of MDBD is the considerably large number of possible types of isotopes compared with $0\nu\beta\beta$-decay. In our work, MDBD rates for all possible choices of the isotopes (from atomic number = 1 to 100) are computed through a systematic procedure. We compare our results with $0\nu\beta\beta$-decay rates and earlier works on MDBD. For some isotopes, MDBD rates are as good as the ones of $0\nu\beta\beta$-decay. Furthermore, we discuss how to distinguish MDBD signals from backgrounds via temporal and spatial correlations. Our results show MDBD is a worthwhile candidate to figure out this mystery in neutrino physics.