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Armengaud, E; Augier, C; Barabash, AS; Bellini, F; Benato, G; Benoît, A; Beretta, M; Bergé, L; Billard, J; Borovlev, Yu A; Bourgeois, Ch; Briere, M; Brudanin, V; Camus, P; Cardani, L; Casali, N; Cazes, A; Chapellier, M; Charlieux, F; Combarieu, M de; Dafinei, I; Danevich, FA; Jesus, M De; Dumoulin, L; Eitel, K; Elkhoury, E; Ferri, F; Fujikawa, BK; Gascon, J; Gironi, L; Giuliani, A; Grigorieva, VD; Gros, M; Guerard, E; Helis, DL; Huang, HZ; Huang, R; Johnston, J; Juillard, A; Khalife, H; Kleifges, M; Kobychev, VV; Kolomensky, Yu G; Konovalov, SI; Leder, A; Kotila, J; Loaiza, P; Ma, L; Makarov, EP; Marcillac, P de; Marini, L; Marnieros, S; Misiak, D; Navick, X-F; Nones, C; Novati, V; Olivieri, E; Ouellet, JL; Pagnanini, L; Pari, P; Pattavina, L; Paul, B; Pavan, M; Peng, H; Pessina, G; Pirro, S; Poda, DV; Polischuk, OG; Previtali, E; Redon, Th; Rozov, S; Rusconi, C; Sanglard, V; Schäffner, K; Schmidt, B; Shen, Y; Shlegel, VN; Siebenborn, B; Singh, V; Tomei, C; Tretyak, VI; Umatov, VI; Vagneron, L; Velázquez, M; Weber, M; Welliver, B; Winslow, L; Xue, M; Yakushev, E; Zolotarova, AS
The European physical journal. C, Particles and fields, 07/2020, Letnik: 80, Številka: 7Journal Article
We report the measurement of the two-neutrino double-beta ($2\nu\beta\beta$) decay of $^{100}$Mo to the ground state of $^{100}$Ru using lithium molybdate (\crystal) scintillating bolometers. The detectors were developed for the CUPID-Mo program and operated at the EDELWEISS-III low background facility in the Modane underground laboratory. From a total exposure of $42.235$ kg$\times$d, the half-life of $^{100}$Mo is determined to be $T_{1/2}^{2\nu}=7.12^{+0.18}_{-0.14}\,\mathrm{(stat.)}\pm0.10\,\mathrm{(syst.)}\times10^{18}$ years. This is the most accurate determination of the $2\nu\beta\beta$ half-life of $^{100}$Mo to date. We also confirm, with the statistical significance of $>3\sigma$, that the single-state dominance model of the $2\nu\beta\beta$ decay of $^{100}$Mo is favored over the high-state dominance model.
