CUPID-0 is the first pilot experiment of CUPID, a next-generation project searching for neutrinoless double beta decay. In its first scientific run, CUPID-0 operated 26 ZnSe cryogenic calorimeters coupled to light detectors in the underground Laboratori Nazionali del Gran Sasso. In this work, we analyzed a ZnSe exposure of 11.34 kg year to search for the neutrinoless double beta decay of 70Zn and for the neutrinoless positron-emitting electron capture of 64Zn. We found no evidence for these decays and set 90% credible interval limits of T1/20νββ(70Zn) > 1.6 10 21 year and T1/20νECβ+(64Zn) > 1.2× 10 22 year, surpassing by more than one order of magnitude the previous experimental results (Belli et al. in J Phys G 38(11):115107, https://doi.org/10.1088/0954-3899/38/11/115107, 2011).
Search for neutrinoless double beta decay of 64 Zn and 70 Zn with CUPID-0 / Azzolini, O., Beeman, J.W., Bellini, F., Beretta, M., Biassoni, M., Brofferio, C., Bucci, C., Capelli, S., Cardani, L., Celi, E., Carniti, P., Casali, N., Chiesa, D., Clemenza, M., Cremonesi, O., Cruciani, A., D'Addabbo, A., Dafinei, I., Domizio, S.D., Ferroni, F., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 80:8(2020). [10.1140/epjc/s10052-020-8280-4]
Search for neutrinoless double beta decay of 64 Zn and 70 Zn with CUPID-0
Bellini F.;Casali N.;Vignati M.;
2020
Abstract
CUPID-0 is the first pilot experiment of CUPID, a next-generation project searching for neutrinoless double beta decay. In its first scientific run, CUPID-0 operated 26 ZnSe cryogenic calorimeters coupled to light detectors in the underground Laboratori Nazionali del Gran Sasso. In this work, we analyzed a ZnSe exposure of 11.34 kg year to search for the neutrinoless double beta decay of 70Zn and for the neutrinoless positron-emitting electron capture of 64Zn. We found no evidence for these decays and set 90% credible interval limits of T1/20νββ(70Zn) > 1.6 10 21 year and T1/20νECβ+(64Zn) > 1.2× 10 22 year, surpassing by more than one order of magnitude the previous experimental results (Belli et al. in J Phys G 38(11):115107, https://doi.org/10.1088/0954-3899/38/11/115107, 2011).| File | Dimensione | Formato | |
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