Abstract

CUPID-0 is the first large mass array of enriched Zn\[^{82}\]Se scintillating low temperature calorimeters, operated at LNGS since 2017. During its first scientific runs, CUPID-0 collected an exposure of 9.95 kg year. Thanks to the excellent rejection of \[\alpha \] particles, we attained the lowest background ever measured with thermal detectors in the energy region where we search for the signature of \[^{82}\hbox {Se}\] neutrinoless double beta decay. In this work we develop a model to reconstruct the CUPID-0 background over the whole energy range of experimental data. We identify the background sources exploiting their distinctive signatures and we assess their extremely low contribution [down to \[\sim 10^{-4}\] counts/(keV kg year)] in the region of interest for \[^{82}\hbox {Se}\] neutrinoless double beta decay search. This result represents a crucial step towards the comprehension of the background in experiments based on scintillating calorimeters and in next generation projects such as CUPID.

Details

Title
Background model of the CUPID-0 experiment
Author
Azzolini, O 1 ; Beeman, J W 2 ; Bellini, F 3 ; Beretta, M 4 ; Biassoni, M 5 ; Brofferio, C 4 ; Bucci, C 6 ; Capelli, S 4 ; Cardani, L 7 ; Carniti, P 4 ; Casali, N 7 ; Chiesa, D 4   VIAFID ORCID Logo  ; Clemenza, M 4 ; Cremonesi, O 5 ; Cruciani, A 3 ; Dafinei, I 7 ; S Di Domizio 8 ; Ferroni, F 9 ; Gironi, L 4 ; Giuliani, A 10 ; Gorla, P 6 ; Gotti, C 4 ; Keppel, G 1 ; Martinez, M 11 ; Nagorny, S 12 ; Nastasi, M 4 ; Nisi, S 6 ; Nones, C 13 ; Orlandi, D 6 ; Pagnanini, L 4 ; Pallavicini, M 8 ; Pattavina, L 6 ; Pavan, M 4 ; Pessina, G 5 ; Pettinacci, V 7 ; Pirro, S 6 ; Pozzi, S 4 ; Previtali, E 4 ; Puiu, A 4 ; Rusconi, C 14 ; Schäffner, K 15 ; Tomei, C 7 ; Vignati, M 7 ; Zolotarova, A 16 

1  INFN-Laboratori Nazionali di Legnaro, Legnaro, Padova, Italy 
2  Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA 
3  Dipartimento di Fisica, Sapienza Università di Roma, Rome, Italy; INFN-Sezione di Roma, Rome, Italy 
4  Dipartimento di Fisica, Università di Milano-Bicocca, Milan, Italy; INFN-Sezione di Milano-Bicocca, Milan, Italy 
5  INFN-Sezione di Milano-Bicocca, Milan, Italy 
6  INFN-Laboratori Nazionali del Gran Sasso, Assergi, L’Aquila, Italy 
7  INFN-Sezione di Roma, Rome, Italy 
8  Dipartimento di Fisica, Università di Genova, Genoa, Italy; INFN-Sezione di Genova, Genoa, Italy 
9  INFN-Sezione di Roma, Rome, Italy; Gran Sasso Science Institute, L’Aquila, Italy 
10  CSNSM, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, Orsay, France 
11  Dipartimento di Fisica, Sapienza Università di Roma, Rome, Italy; INFN-Sezione di Roma, Rome, Italy; Fundación ARAID and Laboratorio de Física Nuclear y Astroparticulas, Universidad de Zaragoza, Zaragoza, Spain 
12  INFN-Laboratori Nazionali del Gran Sasso, Assergi, L’Aquila, Italy; Gran Sasso Science Institute, L’Aquila, Italy; Physics Department, Queen’s University, Kingston, ON, Canada 
13  IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France 
14  INFN-Laboratori Nazionali del Gran Sasso, Assergi, L’Aquila, Italy; Department of Physics and Astronomy, University of South Carolina, Columbia, SC, USA 
15  INFN-Laboratori Nazionali del Gran Sasso, Assergi, L’Aquila, Italy; Gran Sasso Science Institute, L’Aquila, Italy 
16  IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France; CSNSM, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, Orsay, France 
Pages
1-16
Publication year
2019
Publication date
Jul 2019
Publisher
Springer Nature B.V.
ISSN
14346044
e-ISSN
14346052
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1140/epjc/s10052-019-7078-8
ProQuest document ID
2256008833
Copyright
The European Physical Journal C is a copyright of Springer, (2019). All Rights Reserved., © 2019. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.