Analysis of cryogenic calorimeters with light and heat read-out for double beta decay searches

Abstract

The suppression of spurious events in the region of interest for neutrinoless double beta decay will play a major role in next generation experiments. The background of detectors based on the technology of cryogenic calorimeters is expected to be dominated by α particles, that could be disentangled from double beta decay signals by exploiting the difference in the emission of the scintillation light. CUPID-0, an array of enriched Zn${}^{82}$Se scintillating calorimeters, is the first large mass demonstrator of this technology. The detector started data-taking in 2017 at the Laboratori Nazionali del Gran Sasso with the aim of proving that dual read-out of light and heat allows for an efficient suppression of the α background. In this paper we describe the software tools we developed for the analysis of scintillating calorimeters and we demonstrate that this technology allows to reach an unprecedented background for cryogenic calorimeters.

arXiv comment11 pages, 9 figures

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• The CUPID-Mo experiment for neutrinoless double-beta decay: performance and prospects
• New Limit for Neutrinoless Double-Beta Decay of ${}^{100}$Mo from the CUPID-Mo Experiment
• Final result of CUPID-0 phase-I in the search for the ${}^{82}$Se Neutrinoless Double Beta Decay
• Background Model of the CUPID-0 Experiment
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• Final Result on the Neutrinoless Double Beta Decay of ${}^{82}$Se with CUPID-0
• First search for Lorentz violation in double beta decay with scintillating calorimeters
• Search of the neutrino-less double beta decay of ${}^{82}$Se into the excited states of ${}^{82}$Kr with CUPID-0
• Novel technique for the study of pile-up events in cryogenic bolometers
• Observation of a nuclear recoil peak at the 100 eV scale induced by neutron capture
• Radiopurity of a kg-scale PbWO${}_4$ cryogenic detector produced from archaeological Pb for the RES-NOVA experiment
• Search for Majoron-like particles with CUPID-0
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• The background model of the CUPID-Mo $0\nu \beta \beta$ experiment
• First data from the CUPID-Mo neutrinoless double beta decay experiment
• Na-based crystal scintillators for next-generation rare event searches
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• Background identification in cryogenic calorimeters through $\alpha -\alpha$ delayed coincidences
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• Results on ${}^{82}$Se $2\nu \beta \beta$ with CUPID-0 Phase I
• Search for Sterile Neutrinos with CUPID-0