A1 Journal article (refereed)
The background model of the CUPID-Mo 0νββ experiment (2023)

Augier, C., Barabash, A. S., Bellini, F., Benato, G., Beretta, M., Bergé, L., Billard, J., Borovlev, Y. A., Cardani, L., Casali, N., Cazes, A., Celi, E., Chapellier, M., Chiesa, D., Dafinei, I., Danevich, F. A., De Jesus, M., de Marcillac, P., Dixon, T., . . . Zolotarova A., S. (2023). The background model of the CUPID-Mo 0νββ experiment. European Physical Journal C, 83, Article 675. https://doi.org/10.1140/epjc/s10052-023-11830-2

JYU authors or editors

Publication details

All authors or editors: Augier, C.; Barabash, A. S.; Bellini, F.; Benato, G.; Beretta, M.; Bergé, L.; Billard, J.; Borovlev, Yu. A.; Cardani, L.; Casali, N.; et al.

Journal or series: European Physical Journal C

ISSN: 1434-6044

eISSN: 1434-6052

Publication year: 2023

Publication date: 28/07/2023

Volume: 83

Article number: 675

Publisher: Springer

Publication country: Germany

Publication language: English

DOI: https://doi.org/10.1140/epjc/s10052-023-11830-2

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/89912

Web address of parallel published publication (pre-print): https://arxiv.org/abs/2305.01402

Abstract

Abstract CUPID-Mo, located in the Laboratoire Souter rain de Modane (France), was a demonstrator for the next generation 0νββ decay experiment, CUPID. It consisted of an array of 20 enriched Li2 100MoO4 bolometers and 20 Ge light detectors and has demonstrated that the technology of scintillating bolometers with particle identification capabilities is mature. Furthermore, CUPID-Mo can inform and validate the background prediction for CUPID. In this paper, we present a detailed model of the CUPID-Mo backgrounds. This model is able to describe well the features of the experimental data and enables studies of the 2νββ decay and other processes with high precision. We also measure the radio-purity of the Li2 100MoO4 crystals which are found to be sufficient for the CUPID goals. Finally, we also obtain a background index in the region of interest of 3.7 +0.9 −0.8 (stat)+1.5 −0.7 (syst)×10−3 counts/ΔEFWHM/moliso/year, the lowest in a bolometric 0νββ decay experiment.

Keywords: particle physics; nuclear physics

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Ministry reporting: Yes

Reporting Year: 2023

Preliminary JUFO rating: 2