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

Augier, C.; Barabash, A. S.; 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, F. A.; De Jesus, M.; Marcillac, P. de; Dixon, T.; Dumoulin, L.; ... mehr

Abstract:

The CUPID-Mo experiment to search for 0νββ decay in $^{100}$Mo 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$_2^{100}$MoO$_4$ 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 ($^{100}$Mo 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 $^{100}$Mo 0νββ decay half-life of T$^{0ν}_{1/2}$ >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 ⟨m$_{ββ}$⟩ < (0.28−0.49) eV, dependent upon the nuclear matrix element utilized.


Verlagsausgabe §
DOI: 10.5445/IR/1000152778
Veröffentlicht am 03.02.2023
Originalveröffentlichung
DOI: 10.1140/epjc/s10052-022-10942-5
Scopus
Zitationen: 34
Web of Science
Zitationen: 29
Dimensions
Zitationen: 41
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Astroteilchenphysik (IAP)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 15.11.2022
Sprache Englisch
Identifikator ISSN: 1434-6052
KITopen-ID: 1000152778
HGF-Programm 51.13.01 (POF IV, LK 01) Neutrinophysik und Dunkle Materie
Erschienen in The European Physical Journal C
Verlag Springer-Verlag
Band 82
Heft 11
Seiten Art.-Nr.: 1033
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Vorab online veröffentlicht am 17.02.2022
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