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Sensitivity Study of Neutrinoless double beta decay of LEGEND experiment

Neutrinos are one of the most abundant elementary particles in the Universe. First hypothesized by Pauli in 1929 to explain beta decay, and successfully used by Fermi to formulate a successful Beta decay theory, we still know so little about the neutrinos. M G Mayer formulated a double beta decay theory for nuclei, which could not undergo single beta decay, but two simultaneous beta decays can make them achieve more stable state. Using Majorana’s results that neutrino and anti neutrino yield exactly same beta decay results, Furry showed that there is a possibility for neutrinoless double beta decay as well. Experiments are operational and better sensitive experiments are proposed to search this rare decay to prove the nature of neutrinos and determine precise mass scales and hierarchy of neutrino states.