The CUPID-0 experiment searches for double beta decay using cryogenic calorimeters with double (heat and light) read-out. The detector, consisting of 24 ZnSe crystals 95% enriched in 82Se and two natural ZnSe crystals, started data-taking in 2017 at Laboratori Nazionali del Gran Sasso. We present the search for the neutrino-less double beta decay of 82Se into the 01+, 21+ and 22+ excited states of 82Kr with an exposure of 5.74 kg· yr (2.24× 1025 emitters· yr). We found no evidence of the decays and set the most stringent limits on the widths of these processes: Γ(82Se → 82Kr01+)8.55× 10- 24 yr- 1, Γ (82 Se → 82 Kr 21+)<6.25×10-24 yr- 1, Γ(82Se → 82Kr22+)8.25× 10- 24 yr- 1 (90% credible interval).
Search of the neutrino-less double beta decay of 82 Se into the excited states of 82 Kr with CUPID-0 / Azzolini, O.; Barrera, M. T.; Beeman, J. W.; Bellini, F.; Beretta, M.; Biassoni, M.; Bossio, E.; Brofferio, C.; Bucci, C.; Canonica, L.; Capelli, S.; Cardani, L.; Carniti, P.; Casali, N.; Cassina, L.; Clemenza, M.; Cremonesi, O.; Cruciani, A.; D’Addabbo, A.; Dafinei, I.; Domizio, S. Di; Ferroni, F.; Gironi, L.; Giuliani, A.; Gorla, P.; Gotti, C.; Keppel, G.; Martinez, M.; Morganti, S.; Nagorny, S.; Nastasi, M.; Nisi, S.; Nones, C.; Orlandi, D.; Pagnanini, L.; Pallavicini, M.; Palmieri, V.; 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.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 78:11(2018). [10.1140/epjc/s10052-018-6340-9]
Search of the neutrino-less double beta decay of 82 Se into the excited states of 82 Kr with CUPID-0
Bellini, F.;Bossio, E.;Cardani, L.;Casali, N.;Cruciani, A.;Dafinei, I.;Ferroni, F.;Martinez, M.;Vignati, M.;
2018
Abstract
The CUPID-0 experiment searches for double beta decay using cryogenic calorimeters with double (heat and light) read-out. The detector, consisting of 24 ZnSe crystals 95% enriched in 82Se and two natural ZnSe crystals, started data-taking in 2017 at Laboratori Nazionali del Gran Sasso. We present the search for the neutrino-less double beta decay of 82Se into the 01+, 21+ and 22+ excited states of 82Kr with an exposure of 5.74 kg· yr (2.24× 1025 emitters· yr). We found no evidence of the decays and set the most stringent limits on the widths of these processes: Γ(82Se → 82Kr01+)8.55× 10- 24 yr- 1, Γ (82 Se → 82 Kr 21+)<6.25×10-24 yr- 1, Γ(82Se → 82Kr22+)8.25× 10- 24 yr- 1 (90% credible interval).| File | Dimensione | Formato | |
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