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Fiorillo, G.K. Giovanetti, G. Korga, G. Testera, G. Zuzel, H.O. Back, I.F.M. Albuquerque, I. Machulin, J. Maricic, K. Pelczar, L. Pandola, M. Ave Pernas, M. Cadeddu, M. Cadoni, M. Caravati, M. Carlini, M. Gromov, M. Gulino, M. Kuss, M. La Commara, M. Lai, M. Lissia, M. Morrocchi, M.M. Wojcik, M. Pallavicini, M. Razeti, M. Rescigno, M. Skorokhvatov, M. Wada, N. Canci, N. Cargioli, O. Lychagina, O. Samoylov, O. Smirnov, P. Musico, P. Pralavorio, R. Milincic, R. Santorelli, R. Tartaglia, S. Bussino, S. Chashin, S. Davini, S. De Cecco, S.M. Mari, S. Pordes, S. Sanfilippo, S. Stracka, S. Westerdale, T. Alexander, V. Ippolito, V. Pesudo, W.M. Bonivento, Y. Suvorov, Y. Wang","submitted_at":"2026-07-13T12:30:13Z","abstract_excerpt":"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. 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