Evidence of Single State Dominance in the Two-Neutrino Double-
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 Decay of 
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 with CUPID-0

Azzolini, O.; Beeman, J. W.; Bellini, F.; Beretta, M.; Biassoni, M.; Brofferio, C.; Bucci, C.; Capelli, S.; Cardani, L.; Carniti, P.; Casali, N.; Chiesa, D.; Clemenza, M.; Cremonesi, O.; Cruciani, A.; Dafinei, I.; Domizio, S. Di; Ferroni, F.; Gironi, L.; Giuliani, A.; Gorla, P.; Gotti, C.; Keppel, G.; Kotila, J.; Martinez, M.; Nagorny, S.; Nastasi, M.; Nisi, S.; Nones, C.; Orlandi, D.; Pagnanini, L.; Pallavicini, M.; Pattavina, L.; Pavan, M.; Pessina, G.; Pettinacci, V.; Pirro, S.; Pozzi, S.; Previtali, E.; Puiu, A.; Rusconi, C.; Schäffner, K.; Tomei, C.; Vignati, M.; Zolotarova, A.

doi:10.1103/physrevlett.123.262501

Cited by 63 publications

(63 citation statements)

References 42 publications

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“…Despite the low probability for this process to happen, double beta decay has been already observed for 12 nuclei, with typical half-lives in the range of 10 18 -10 24 yr [2]. In recent times, some expera e-mail: cupid.publications@lngs.infn.it (corresponding author) b Also at Physik-Department, Technische Universität München, Garching, Germany imental techniques have reached such a high precision on the measurement of this process that today it is possible to infer important nuclear properties or even search for physics beyond the Standard Model of Particles and Fields (SM) by studying spectral distortions [3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…The combination of scintillating bolometers and high Q ββ value emitters was developed by the LUCIFER [34][35][36][37][38][39][40][41] and LUMINEU [42][43][44][45][46][47][48] projects, as well as by the AMoRE Collaboration [49]. The outcomes of LUCIFER and LUMINEU were two medium-scale demonstrators, CUPID-0 [3,4,19,[50][51][52] and CUPID-Mo [21,48,53,54] respectively. Thanks to the high collected statistics, CUPID-0 proved that the technique of scintillating bolometers allows to suppress the α background by about 3 orders of magnitude, matching the CUPID requirements.…”

Section: Introductionmentioning

confidence: 99%

“…Fig 4. Light yield measured in a LD as a function of the energy deposited in the LMO surrounded by the reflecting foil (blue) and LMO without reflector (red).…”

mentioning

confidence: 99%

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Characterization of cubic Li$$_{2}$$$$^{100}$$MoO$$_4$$ crystals for the CUPID experiment

Armatol¹,

Armengaud²,

Armstrong³

et al. 2021

Eur. Phys. J. C

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The CUPID Collaboration is designing a tonne-scale, background-free detector to search for double beta decay with sufficient sensitivity to fully explore the parameter space corresponding to the inverted neutrino mass hierarchy scenario. One of the CUPID demonstrators, CUPID-Mo, has proved the potential of enriched Li$$_{2}$$ 2 $$^{100}$$ 100 MoO$$_4$$ 4 crystals as suitable detectors for neutrinoless double beta decay search. In this work, we characterised cubic crystals that, compared to the cylindrical crystals used by CUPID-Mo, are more appealing for the construction of tightly packed arrays. We measured an average energy resolution of ($$6.7\pm 0.6$$ 6.7 ± 0.6 ) keV FWHM in the region of interest, approaching the CUPID target of 5 keV FWHM. We assessed the identification of $$\alpha $$ α particles with and without a reflecting foil that enhances the scintillation light collection efficiency, proving that the baseline design of CUPID already ensures a complete suppression of this $$\alpha $$ α -induced background contribution. We also used the collected data to validate a Monte Carlo simulation modelling the light collection efficiency, which will enable further optimisations of the detector.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Characterization of cubic Li$$_{2}$$$$^{100}$$MoO$$_4$$ crystals for the CUPID experiment

Armatol¹,

Armengaud²,

Armstrong³

et al. 2021

Eur. Phys. J. C

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“…This has the benefit that experimental searches for these effects, such as described in Refs. [5,10,31], could be adapted to our scenario.…”

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confidence: 99%

Searching for New Physics in Two-Neutrino Double Beta Decay

2020

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“…The CUPID-0 background model (BM) has been exploited also to measure the 2νDBD of 82 Se with unprecedented precision and accuracy: T 2ν 1/2 = [8.60 ± 0.03(stat) +0.19 −0.13 (stat)] × 10 19 yr [15]. In this work, we test two different nuclear models for the 2νDBD, which can be described as a sequence of two virtual β decays going through one or more states of the (A,Z+1) intermediate nucleus.…”

Section: Background Analysis and Physics Resultsmentioning

confidence: 99%

Double beta decay results from the CUPID-0 experiment

Chiesa¹,

Azzolini²,

Beeman³

et al. 2021

Proceedings of 40th International Conference on High Energy Physics — PoS(ICHEP2020)

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A convincing observation of neutrino-less double beta decay (0νDBD) relies on the possibility of operating high energy-resolution detectors in background-free conditions. Scintillating cryogenic calorimeters are one of the most promising tools to fulfill the requirements for a next-generation experiment. Several steps have been taken to demonstrate the maturity of this technique, starting from the successful experience of CUPID-0. The CUPID-0 experiment demonstrated the complete rejection of the dominant alpha background measuring the lowest counting rate in the region of interest for this technique. Furthermore, the most stringent limit on the 82 Se 0νDBD was established running 26 ZnSe crystals during two years of continuous detector operation. In this contribution we present the final results of CUPID-0 Phase I including a detailed model of the background, the measurement of the 82 Se 2νDBD half-life and the evidence that this nuclear transition is single state dominated.

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Evidence of Single State Dominance in the Two-Neutrino Double- β Decay of Se82 with CUPID-0

Cited by 63 publications

References 42 publications

Characterization of cubic Li$$_{2}$$$$^{100}$$MoO$$_4$$ crystals for the CUPID experiment

Characterization of cubic Li$$_{2}$$$$^{100}$$MoO$$_4$$ crystals for the CUPID experiment

Searching for New Physics in Two-Neutrino Double Beta Decay

Double beta decay results from the CUPID-0 experiment

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