Journal Article

Search of the neutrino-less double beta decay of \\^{82}\\ Se into the excited states of \\^{82}\\ Kr with CUPID-0

Bucci, C, Cruciani, A, S Di Domizio, Gotti, C, Pessina, G, Previtali, E, Azzolini, O, Puiu, A, Cardani, L, Pattavina, L, Bossio, E, Nisi, S, Clemenza, M, Vignati, M, Carniti, P, Casali, N, Beretta, M, Nastasi, M, Dafinei, I, Bellini, F, Brofferio, C, Canonica, L, Nagorny, S, Schäffner, K, Nones, C, Pozzi, S, Martinez, M, Pallavicini, M, Ferroni, F, Tomei, C, Pagnanini, L, Palmieri, V, A D’Addabbo, Biassoni, M, Pavan, M, Barrera, M T, Gironi, L, Zolotarova, A, Morganti, S, Capelli, S, Giuliani, A, Pirro, S, Beeman, J W, Keppel, G, Orlandi, D, Gorla, P, Pettinacci, V, Cremonesi, O, Cassina, L, Rusconi, C

2018

Overview

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 \\[^{82}\\]Se 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 \\[^{82}\\]Se into the 0\\[_1^+\\], 2\\[_1^+\\] and 2\\[_2^+\\] excited states of \\[^{82}\\]Kr with an exposure of 5.74 kg\\[\\cdot \\]yr (2.24\\[\\times \\]10\\[^{25}\\] emitters\\[\\cdot \\]yr). We found no evidence of the decays and set the most stringent limits on the widths of these processes: \\[\\varGamma \\](\\[^{82}\\]Se \\[\\rightarrow ^{82}\\]Kr\\[_{0_1^+}\\])8.55\\[\\times \\]10\\[^{-24}\\] yr\\[^{-1}\\], \\[\\varGamma \\] (\\[^{82}\\] Se \\[\\rightarrow ^{82}\\] Kr \\[_{2_1^+}\\])\\[\\,{<}\\,6.25 \\,{\\times }\\,10^{-24}\\] yr\\[^{-1}\\], \\[\\varGamma \\](\\[^{82}\\]Se \\[\\rightarrow ^{82}\\]Kr\\[_{2_2^+}\\])8.25\\[\\times \\]10\\[^{-24}\\] yr\\[^{-1}\\] (90\\[\\%\\] credible interval).

• Publisher: Springer Nature B.V
• Subject: Beta decay / Emitters / Neutrinos