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〉 <(0.28-0.49) eV, dependent upon the nuclear matrix element utilized.

Augier, C., Barabash, A., Bellini, F., Benato, G., Beretta, M., Berge, L., et al. (2022). Final results on the 0 νββ decay half-life limit of 100 Mo from the CUPID-Mo experiment. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 82(11) [10.1140/epjc/s10052-022-10942-5].

Final results on the 0 νββ decay half-life limit of 100 Mo from the CUPID-Mo experiment

Beretta M.;Chiesa D.;Gironi L.;Pagnanini L.;Pavan M.;Pessina G.;Pozzi S.;Previtali E.;
2022

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〉 <(0.28-0.49) eV, dependent upon the nuclear matrix element utilized.
Articolo in rivista - Articolo scientifico
double beta decay, neutrino
English
Augier, C., Barabash, A., Bellini, F., Benato, G., Beretta, M., Berge, L., et al. (2022). Final results on the 0 νββ decay half-life limit of 100 Mo from the CUPID-Mo experiment. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 82(11) [10.1140/epjc/s10052-022-10942-5].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/401020
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