학술논문
Final results on the 0νββ decay half-life limit of 100Mo from the CUPID-Mo experiment
Document Type
article
Author
Augier, C; Barabash, AS; Bellini, F; Benato, G; Beretta, M; Bergé, L; Billard, J; Borovlev, Yu A; Cardani, L; Casali, N; Cazes, A; Chapellier, M; Chiesa, D; Dafinei, I; Danevich, FA; De Jesus, M; de Marcillac, P; Dixon, T; Dumoulin, L; Eitel, K; Ferri, F; Fujikawa, BK; Gascon, J; Gironi, L; Giuliani, A; Grigorieva, VD; Gros, M; Helis, DL; Huang, HZ; Huang, R; Imbert, L; Johnston, J; Juillard, A; Khalife, H; Kleifges, M; Kobychev, VV; Kolomensky, Yu G; Konovalov, SI; Loaiza, P; Ma, L; Makarov, EP; Mariam, R; Marini, L; Marnieros, S; Navick, X-F; Nones, C; Norman, EB; Olivieri, E; Ouellet, JL; Pagnanini, L; 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; Sanglard, V; Scarpaci, JA; Schmidt, B; Shen, Y; Shlegel, VN; Singh, V; Tomei, C; Tretyak, VI; Umatov, VI; Vagneron, L; Velázquez, M; Welliver, B; Winslow, L; Xue, M; Yakushev, E; Zarytskyy, M; Zolotarova, AS
Source
European Physical Journal C. 82(11)
Subject
Language
Abstract
The CUPID-Mo experiment to search for 0νββ decay in 100Mo has been recently completed after about 1.5 years of operation at Laboratoire Souterrain de Modane (France). It served as a demonstrator for CUPID, a next generation 0νββ decay experiment. CUPID-Mo was comprised of 20 enriched Li 2100MoO 4 scintillating calorimeters, each with a mass of ∼ 0.2 kg, operated at ∼ 20 mK. We present here the final analysis with the full exposure of CUPID-Mo (100Mo exposure of 1.47 kg × year) used to search for lepton number violation via 0νββ decay. We report on various analysis improvements since the previous result on a subset of data, reprocessing all data with these new techniques. We observe zero events in the region of interest and set a new limit on the 100Mo 0νββ decay half-life of T1/20ν> 1.8 × 10 24 year (stat. + syst.) at 90% CI. Under the light Majorana neutrino exchange mechanism this corresponds to an effective Majorana neutrino mass of 〈 mββ〉