https://doi.org/10.1140/epjc/s10052-019-7578-6
Regular Article - Experimental Physics
The CUPID-Mo experiment for neutrinoless double-beta decay: performance and prospects
1
IRFU, CEA, Université Paris-Saclay, 91191, Gif-sur-Yvette, France
2
Univ Lyon, Université Lyon 1, CNRS/IN2P3, IP2I-Lyon, 69622, Villeurbanne, France
3
National Research Centre Kurchatov Institute, Institute of Theoretical and Experimental Physics, 117218, Moscow, Russia
4
Dipartimento di Fisica, Sapienza Università di Roma, P.le Aldo Moro 2, 00185, Rome, Italy
5
INFN, Sezione di Roma, P.le Aldo Moro 2, 00185, Rome, Italy
6
Department of Physics, University of California, Berkeley, CA, 94720, USA
7
CNRS-Néel, 38042, Grenoble Cedex 9, France
8
Dipartimento di Fisica, Università di Milano-Bicocca, 20126, Milan, Italy
9
INFN, Sezione di Milano-Bicocca, 20126, Milan, Italy
10
CSNSM, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, 91405, Orsay, France
11
Nikolaev Institute of Inorganic Chemistry, 630090, Novosibirsk, Russia
12
LAL, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, 91898, Orsay, France
13
Laboratory of Nuclear Problems, JINR, 141980, Dubna, Moscow region, Russia
14
IRAMIS, CEA, Université Paris-Saclay, 91191, Gif-sur-Yvette, France
15
Institute for Nuclear Research, Kiev, 03028, Ukraine
16
Karlsruhe Institute of Technology, Institut für Kernphysik, 76021, Karlsruhe, Germany
17
Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
18
DISAT, Università dell’Insubria, 22100, Como, Italy
19
Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Fudan University, Shanghai, 200433, People’s Republic of China
20
Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
21
Karlsruhe Institute of Technology, Institut für Prozessdatenverarbeitung und Elektronik, 76021, Karlsruhe, Germany
22
Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
23
INFN, Laboratori Nazionali del Gran Sasso, 67100, Assergi, AQ, Italy
24
Physik Department, Technische Universität München, 85748, Garching, Germany
25
Department of Modern Physics, University of Science and Technology of China, Hefei, 230027, People’s Republic of China
26
Department of Physics and Astronomy, University of South Carolina, Columbia, SC, 29208, USA
27
Université Grenoble Alpes, CNRS, Grenoble INP, SIMAP, 38402, Saint Martin d’Héres, France
* e-mail: andrea.giuliani@csnsm.in2p3.fr
Received:
12
September
2019
Accepted:
20
December
2019
Published online:
18
January
2020
CUPID-Mo is a bolometric experiment to search for neutrinoless double-beta decay (
) of 
. In this article, we detail the CUPID-Mo detector concept, assembly and installation in the Modane underground laboratory, providing results from the first datasets. The CUPID-Mo detector consists of an array of 20 -enriched 0.2 kg 
crystals operated as scintillating bolometers at 
. The crystals are complemented by 20 thin Ge optical bolometers to reject 
events by the simultaneous detection of heat and scintillation light. We observe a good detector uniformity and an excellent energy resolution of 5.3 keV (6.5 keV) FWHM at 2615 keV, in calibration (physics) data. Light collection ensures the rejection of particles at a level much higher than 99.9% – with equally high acceptance for 
/
events – in the region of interest for
. We present limits on the crystals’ radiopurity: 
of 
and 
of 
. We discuss the science reach of CUPID-Mo, which can set the most stringent half-life limit on the
decay in half-a-year’s livetime. The achieved results show that CUPID-Mo is a successful demonstrator of the technology developed by the LUMINEU project and subsequently selected for the CUPID experiment, a proposed follow-up of CUORE, the currently running first tonne-scale bolometric experiment.
© The Author(s), 2020
