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New Limit for Neutrinoless Double-Beta Decay of ^{100}Mo from the CUPID-Mo Experiment.

  • Author(s): Armengaud, E;
  • Augier, C;
  • Barabash, AS;
  • Bellini, F;
  • Benato, G;
  • Benoît, A;
  • Beretta, M;
  • Bergé, L;
  • Billard, J;
  • Borovlev, Yu A;
  • Bourgeois, Ch;
  • Brudanin, VB;
  • Camus, P;
  • Cardani, L;
  • Casali, N;
  • Cazes, A;
  • Chapellier, M;
  • Charlieux, F;
  • Chiesa, D;
  • de Combarieu, M;
  • Dafinei, I;
  • Danevich, FA;
  • De Jesus, M;
  • Dixon, T;
  • Dumoulin, L;
  • Eitel, K;
  • 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;
  • Loaiza, P;
  • Ma, L;
  • Makarov, EP;
  • de Marcillac, P;
  • Mariam, R;
  • Marini, L;
  • Marnieros, S;
  • Misiak, D;
  • Navick, X-F;
  • Nones, C;
  • Norman, EB;
  • 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;
  • Pozzi, S;
  • Previtali, E;
  • Redon, Th;
  • Rojas, A;
  • Rozov, S;
  • Rusconi, C;
  • Sanglard, V;
  • Scarpaci, JA;
  • Schäffner, K;
  • Schmidt, B;
  • Shen, Y;
  • Shlegel, VN;
  • Siebenborn, B;
  • Singh, V;
  • Tomei, C;
  • Tretyak, VI;
  • Umatov, VI;
  • Vagneron, L;
  • Velázquez, M;
  • Welliver, B;
  • Winslow, L;
  • Xue, M;
  • Yakushev, E;
  • Zarytskyy, M;
  • Zolotarova, AS;
  • CUPID-Mo Collaboration
  • et al.
Abstract

The CUPID-Mo experiment at the Laboratoire Souterrain de Modane (France) is a demonstrator for CUPID, the next-generation ton-scale bolometric 0νββ experiment. It consists of a 4.2 kg array of 20 enriched Li_{2}^{100}MoO_{4} scintillating bolometers to search for the lepton-number-violating process of 0νββ decay in ^{100}Mo. With more than one year of operation (^{100}Mo exposure of 1.17  kg×yr for physics data), no event in the region of interest and, hence, no evidence for 0νββ is observed. We report a new limit on the half-life of 0νββ decay in ^{100}Mo of T_{1/2}>1.5×10^{24}  yr at 90% C.I. The limit corresponds to an effective Majorana neutrino mass ⟨m_{ββ}⟩<(0.31-0.54)  eV, dependent on the nuclear matrix element in the light Majorana neutrino exchange interpretation.

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