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  • Detailed studies of \(^{100}\)Mo two-neutrino double beta decay in NEMO-3
    NEMO-3 Collaboration; Arnold, R; Augier, C; Barabash, A S; Basharina-Freshville, A; Blot, S; Bongrand, M; Boursette, D; Brudanin, V; Busto, J; Caffrey, A J; Calvez, S; Cascella, M; Cerna, C; Cesar, J P; Chapon, A; Chauveau, E; Chopra, A; Dawson, L; Duchesneau, D; Durand, D; Dvornický, R; Egorov, V; Eurin, G; Evans, J J; Fajt, L; Filosofov, D; Flack, R; Garrido, X; Girard-Carillo, C; Gómez, H; Guillon, B; Hodák, R; Huber, A; Hubert, P; Hugon, C; Kochetov, O; Konovalov, S I; Kovalenko, V; Lalanne, D; Lang, K; Lemière, Y; T Le Noblet; Liptak, Z; Liu, X R; Loaiza, P; Lutter, G; Mamedov, F; Marquet, C; Mauger, F; Minotti, A; Morgan, B; Mott, J; Nemchenok, I; Nomachi, M; Nova, F; Nowacki, F; Oliviéro, G; Pahlka, R B; Patrick, C; Perrot, F; Pin, A; Piquemal, F; Povinec, P; Přidal, P; Ramachers, Y A; Remoto, A; Reyss, J L; Riddle, C L; Rukhadze, E; Saakyan, R; Salamatin, A; Salazar, R; Sarazin, X; Sedgbeer, J; Yu Shitov; Simard, L; Šimkovic, F; Smetana, A; Smolek, K; Smolnikov, A; Söldner-Rembold, S; Soulé, B; Štekl, I; Suhonen, J; Sutton, C S; Szklarz, G; Tedjditi, H; Thomas, J; Timkin, V; Torre, S; Tretyak, Vl I; Tretyak, V I; Umatov, V I; Vanushin, I; Vilela, C; Vorobel, V; Waters, D; Xie, F; Žukauskas, A

    arXiv.org, 05/2019
    Paper, Journal Article

    The full data set of the NEMO-3 experiment has been used to measure the half-life of the two-neutrino double beta decay of \(^{100}\)Mo to the ground state of \(^{100}\)Ru, \(T_{1/2} = \left 6.81 \pm 0.01\,\left(\mbox{stat}\right) ^{+0.38}_{-0.40}\,\left(\mbox{syst}\right) \right \times10^{18}\) y. The two-electron energy sum, single electron energy spectra and distribution of the angle between the electrons are presented with an unprecedented statistics of \(5\times10^5\) events and a signal-to-background ratio of ~80. Clear evidence for the Single State Dominance model is found for this nuclear transition. Limits on Majoron emitting neutrinoless double beta decay modes with spectral indices of n=2,3,7, as well as constraints on Lorentz invariance violation and on the bosonic neutrino contribution to the two-neutrino double beta decay mode are obtained.

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