The CUPID-Mo experiment to search for 0 $$$$\nu \beta \beta $$$$ decay in $$$$^{100}$$$$ Mo has been recently completed after about 1.5 years of operation at Laboratoire Souterrain de Modane (France). It served as a demonstrator for CUPID, a next generation 0 $$$$\nu \beta \beta $$$$ decay experiment. CUPID-Mo was comprised of 20 enriched $$$$\hbox {Li}_{{2}}$$$$ $$$$^{100}$$$$ $$$$\hbox {MoO}_4$$$$ scintillating calorimeters, each with a mass of $$$$\sim 0.2$$$$ kg, operated at $$$$\sim 20$$$$ mK. We present here the final analysis with the full exposure of CUPID-Mo ( $$$$^{100}$$$$ Mo exposure of 1.47 $$$$\hbox {kg} \times \hbox {year}$$$$ ) used to search for lepton number violation via 0 $$$$\nu \beta \beta $$$$ decay. We report on various analysis improvements since the previous result on a subset of data, reprocessing all data with these new techniques. We observe zero events in the region of interest and set a new limit on the $$$$^{100}$$$$ Mo 0 $$$$\nu \beta \beta $$$$ decay half-life of $$$$T_{1/2}^{0\nu }$$$$ $$$$> {1.8}\times 10^{24}$$$$ year (stat. + syst.) at 90% CI. Under the light Majorana neutrino exchange mechanism this corresponds to an effective Majorana neutrino mass of $$$$\left$$$$ $$$$<~{(0.28{-}0.49)} $$$$ eV, dependent upon the nuclear matrix element utilized.
Augier, C., et al. "Final results on the $$0\nu \beta \beta $$ decay half-life limit of $$^{100}$$Mo from the CUPID-Mo experiment." European Physical Journal. C, Particles and Fields (Online), vol. 82, no. 11, Nov. 2022. https://doi.org/10.1140/epjc/s10052-022-10942-5
Augier, C., Barabash, A. S., Bellini, F., Benato, G., Beretta, M., Bergé, L., Billard, J., Borovlev, Yu. A., Cardani, L., Casali, N., Cazes, A., Chapellier, M., Chiesa, D., Dafinei, I., Danevich, F. A., De Jesus, M., de Marcillac, P., Dixon, T., ... Zolotarova, A. S. (2022). Final results on the $$0\nu \beta \beta $$ decay half-life limit of $$^{100}$$Mo from the CUPID-Mo experiment. European Physical Journal. C, Particles and Fields (Online), 82(11). https://doi.org/10.1140/epjc/s10052-022-10942-5
Augier, C., Barabash, A. S., Bellini, F., et al., "Final results on the $$0\nu \beta \beta $$ decay half-life limit of $$^{100}$$Mo from the CUPID-Mo experiment," European Physical Journal. C, Particles and Fields (Online) 82, no. 11 (2022), https://doi.org/10.1140/epjc/s10052-022-10942-5
@article{osti_1898240,
author = {Augier, C. and Barabash, A. S. and Bellini, F. and Benato, G. and Beretta, M. and Bergé, L. and Billard, J. and Borovlev, Yu. A. and Cardani, L. and Casali, N. and others},
title = {Final results on the $$0\nu \beta \beta $$ decay half-life limit of $$^{100}$$Mo from the CUPID-Mo experiment},
annote = {Abstract The CUPID-Mo experiment to search for 0 $$\nu \beta \beta $$ ν β β decay in $$^{100}$$ 100 Mo has been recently completed after about 1.5 years of operation at Laboratoire Souterrain de Modane (France). It served as a demonstrator for CUPID, a next generation 0 $$\nu \beta \beta $$ ν β β decay experiment. CUPID-Mo was comprised of 20 enriched $$\hbox {Li}_{{2}}$$ Li 2 $$^{100}$$ 100 $$\hbox {MoO}_4$$ MoO 4 scintillating calorimeters, each with a mass of $$\sim 0.2$$ ∼ 0.2 kg, operated at $$\sim 20$$ ∼ 20 mK. We present here the final analysis with the full exposure of CUPID-Mo ( $$^{100}$$ 100 Mo exposure of 1.47 $$\hbox {kg} \times \hbox {year}$$ kg × year ) used to search for lepton number violation via 0 $$\nu \beta \beta $$ ν β β decay. We report on various analysis improvements since the previous result on a subset of data, reprocessing all data with these new techniques. We observe zero events in the region of interest and set a new limit on the $$^{100}$$ 100 Mo 0 $$\nu \beta \beta $$ ν β β decay half-life of $$T_{1/2}^{0\nu }$$ T 1 / 2 0 ν $$> {1.8}\times 10^{24}$$ > 1.8 × 10 24 year (stat. + syst.) at 90% CI. Under the light Majorana neutrino exchange mechanism this corresponds to an effective Majorana neutrino mass of $$\left$$ m β β $$ ( 0.28 - 0.49 ) eV, dependent upon the nuclear matrix element utilized. },
doi = {10.1140/epjc/s10052-022-10942-5},
url = {https://www.osti.gov/biblio/1898240},
journal = {European Physical Journal. C, Particles and Fields (Online)},
issn = {ISSN 1434-6052},
number = {11},
volume = {82},
place = {Germany},
publisher = {Springer Science + Business Media},
year = {2022},
month = {11}}
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 412, Issue 2-3https://doi.org/10.1016/S0168-9002(98)00458-6