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).
Azzolini, O., Barrera, M., Beeman, J., Bellini, F., Beretta, M., Biassoni, M., et al. (2018). Search of the neutrino-less double beta decay of 82 Se into the excited states of 82 Kr with CUPID-0. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 78(11) [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
Beretta, M.;Biassoni, M.;Brofferio, C.;Canonica, L.;Capelli, S.;Carniti, P.;Cassina, L.;Clemenza, M.;Cremonesi, O.;Gironi, L.;Gotti, C.;Nastasi, M.;Pagnanini, L.;Pattavina, L.;Pavan, M.;Pessina, G.;Pozzi, S.;Previtali, E.;Puiu, A.;
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).
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Azzolini2018_Article_SearchOfTheNeutrino-lessDouble.pdf
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