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nucl-ex2026
Search for two-neutrino double electron capture in Ar with the DarkSide-50 detector
50 Collaboration, P. Agnes, I. F. M. Albuquerque +83
Two-neutrino double electron capture is a rare nuclear decay where two electrons are simultaneously captured from the atomic shells and two neutrinos are emitted. We report on the…
hep-ex2026
Observation of the decays and
Belle, Belle II Collaborations, : +403
We report the first observation of the decays and , with significances of a…