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New Limit for Neutrinoless Double-Beta Decay of ¹⁰⁰Mo from the CUPID-Mo Experiment

CUPID-Mo Collaboration; Armengaud, E.; Augier, C.; Barabash, A. S.; Bellini, F.; Benato, G.; Benoît, A.; Beretta, M.; Bergé, L.; Billard, J.; Borovlev, Yu. A.; Bourgeois, Ch.; Brudanin, V. B.; Camus, P.; Cardani, L.; Casali, N.; Cazes, A.; Chapellier, M.; Charlieux, F.; Chiesa, D.; de Combarieu, M.; ... mehr

Abstract (englisch):
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$_{\beta \beta}$⟩<(0.31–0.54)  eV, dependent on the nuclear matrix element in the light Majorana neutrino exchange interpretation.

DOI: 10.1103/PhysRevLett.126.181802
Zugehörige Institution(en) am KIT Institut für Astroteilchenphysik (IAP)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 03.05.2021
Sprache Englisch
Identifikator ISSN: 0031-9007, 1079-7114
KITopen-ID: 1000132322
HGF-Programm 51.03.05 (POF III, LK 01) Dunkle Materie
Erschienen in Physical review letters
Verlag American Physical Society (APS)
Band 126
Heft 18
Seiten Article no: 181802
Vorab online veröffentlicht am 26.11.2020
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