The CUPID-Mo experiment to search for 0 nu beta beta decay in Mo-100 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 0 nu beta beta decay experiment. CUPID-Mo was comprised of 20 enriched Li-2 (MoO4)-Mo-100 scintillating calorimeters, each with a mass of similar to 0.2 kg, operated at similar to 20 mK. We present here the final analysis with the full exposure of CUPID-Mo (Mo-100 exposure of 1.47 kg x year) used to search for lepton number violation via 0 nu beta beta 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 Mo-100 0 nu beta beta decay half-life of T-1/2(0 nu) > 1.8 x 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(beta beta)> < (0.28-0.49) eV, dependent upon the nuclear matrix element utilized.
Final results on the $$0 u eta eta $$ decay half-life limit of $$^{100}$$Mo from the CUPID-Mo experiment / Augier, C., Barabash, A.S., Bellini, F., Benato, G., Beretta, M., Berg??, L., Billard, J., Borovlev, Yu.A., Cardani, L., Casali, N., Cazes, A., Chapellier, M., Chiesa, D., Dafinei, I., Danevich, F.A., De Jesus, M., De Marcillac, P., Dixon, T., Dumoulin, L., Eitel, K., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 82:11(2022). [10.1140/epjc/s10052-022-10942-5]
Final results on the $$0 u eta eta $$ decay half-life limit of $$^{100}$$Mo from the CUPID-Mo experiment
F. Bellini;
2022
Abstract
The CUPID-Mo experiment to search for 0 nu beta beta decay in Mo-100 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 0 nu beta beta decay experiment. CUPID-Mo was comprised of 20 enriched Li-2 (MoO4)-Mo-100 scintillating calorimeters, each with a mass of similar to 0.2 kg, operated at similar to 20 mK. We present here the final analysis with the full exposure of CUPID-Mo (Mo-100 exposure of 1.47 kg x year) used to search for lepton number violation via 0 nu beta beta 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 Mo-100 0 nu beta beta decay half-life of T-1/2(0 nu) > 1.8 x 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(beta beta)> < (0.28-0.49) eV, dependent upon the nuclear matrix element utilized.| File | Dimensione | Formato | |
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Bellini_ CUPID-Mo-experiment_2022.pdf
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Bellini_CUPID-Mo-experiment_2022.pdf
accesso aperto
Note: Articolo completo
Tipologia:
Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza:
Creative commons
Dimensione
2.55 MB
Formato
Adobe PDF
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2.55 MB | Adobe PDF |
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