The Cryogenic Underground Observatory for Rare Events (CUORE) is a large-scale cryogenic experiment searching for neutrinoless double-beta decay (0νββ) in Te130. The CUORE detector is made of natural tellurium, providing the possibility of rare event searches on isotopes other than Te130. In this work we describe a search for neutrinoless positron-emitting electron capture (β+EC) decay in Te120 with a total TeO2 exposure of 355.7 kg yr, corresponding to 0.2405 kg yr of Te120. Albeit 0νββ with two final-state electrons represents the most promising channel, the emission of a positron and two 511-keV γ's make 0νβ+EC decay signature extremely clear. To fully exploit the potential offered by the detector modularity we include events with different topology and perform a simultaneous fit of five selected signal signatures. Using blinded data we extract a median exclusion sensitivity of 3.4×1022 yr at 90% credibility interval (C.I.). After unblinding we find no evidence of 0νβ+EC signal and set a 90% C.I. Bayesian lower limit of 2.9×1022 yr on Te120 half-life. This result improves by an order of magnitude the existing limit from the combined analysis of CUORE-0 and Cuoricino.

Adams, D., Alduino, C., Alfonso, K., Avignone, F., Azzolini, O., Bari, G., et al. (2022). Search for neutrinoless β+ EC decay of Te 120 with CUORE. PHYSICAL REVIEW C, 105(6) [10.1103/PhysRevC.105.065504].

Search for neutrinoless β+ EC decay of Te 120 with CUORE

Biassoni M.;Branca A.;Brofferio C.;Capelli S.;Carniti P.;Chiesa D.;Cremonesi O.;Dell'oro S.;Faverzani M.;Fiorini E.;Giachero A.;Gianvecchio A.;Gironi L.;Gotti C.;Nastasi M.;Nucciotti A.;Nutini I.;Pavan M.;Pessina G.;Pozzi S.;Previtali E.;Sisti M.;Terranova F.;
2022

Abstract

The Cryogenic Underground Observatory for Rare Events (CUORE) is a large-scale cryogenic experiment searching for neutrinoless double-beta decay (0νββ) in Te130. The CUORE detector is made of natural tellurium, providing the possibility of rare event searches on isotopes other than Te130. In this work we describe a search for neutrinoless positron-emitting electron capture (β+EC) decay in Te120 with a total TeO2 exposure of 355.7 kg yr, corresponding to 0.2405 kg yr of Te120. Albeit 0νββ with two final-state electrons represents the most promising channel, the emission of a positron and two 511-keV γ's make 0νβ+EC decay signature extremely clear. To fully exploit the potential offered by the detector modularity we include events with different topology and perform a simultaneous fit of five selected signal signatures. Using blinded data we extract a median exclusion sensitivity of 3.4×1022 yr at 90% credibility interval (C.I.). After unblinding we find no evidence of 0νβ+EC signal and set a 90% C.I. Bayesian lower limit of 2.9×1022 yr on Te120 half-life. This result improves by an order of magnitude the existing limit from the combined analysis of CUORE-0 and Cuoricino.
Si
Articolo in rivista - Articolo scientifico
Scientifica
Te-120; Double Beta Decay; Cryo-detectors
English
D. Q. Adams et al. (CUORE Collaboration)
Adams, D., Alduino, C., Alfonso, K., Avignone, F., Azzolini, O., Bari, G., et al. (2022). Search for neutrinoless β+ EC decay of Te 120 with CUORE. PHYSICAL REVIEW C, 105(6) [10.1103/PhysRevC.105.065504].
Adams, D; Alduino, C; Alfonso, K; Avignone, F; Azzolini, O; Bari, G; Bellini, F; Benato, G; Beretta, M; Biassoni, M; Branca, A; Brofferio, C; Bucci, C; Camilleri, J; Caminata, A; Campani, A; Canonica, L; Cao, X; Capelli, C; Capelli, S; Cappelli, L; Cardani, L; Carniti, P; Casali, N; Celi, E; Chiesa, D; Clemenza, M; Copello, S; Cremonesi, O; Creswick, R; D'Addabbo, A; Dafinei, I; Del Corso, F; Dell'Oro, S; Di Domizio, S; Di Lorenzo, S; Dompe, V; Fang, D; Fantini, G; Faverzani, M; Ferri, E; Ferroni, F; Fiorini, E; Franceschi, M; Freedman, S; Fu, S; Fujikawa, B; Ghislandi, S; Giachero, A; Gianvecchio, A; Gironi, L; Giuliani, A; Gorla, P; Gotti, C; Gutierrez, T; Han, K; Hansen, E; Heeger, K; Huang, R; Huang, H; Johnston, J; Keppel, G; Kolomensky, Y; Kowalski, R; Ligi, C; Liu, R; Ma, L; Ma, Y; Marini, L; Maruyama, R; Mayer, D; Mei, Y; Morganti, S; Napolitano, T; Nastasi, M; Nikkel, J; Nones, C; Norman, E; Nucciotti, A; Nutini, I; O'Donnell, T; Olmi, M; Ouellet, J; Pagan, S; Pagliarone, C; Pagnanini, L; Pallavicini, M; Pattavina, L; Pavan, M; Pessina, G; Pettinacci, V; Pira, C; Pirro, S; Pozzi, S; Previtali, E; Puiu, A; Quitadamo, S; Ressa, A; Rosenfeld, C; Sakai, M; Sangiorgio, S; Schmidt, B; Scielzo, N; Sharma, V; Singh, V; Sisti, M; Speller, D; Surukuchi, P; Taffarello, L; Terranova, F; Tomei, C; Vetter, K; Vignati, M; Wagaarachchi, S; Wang, B; Welliver, B; Wilson, J; Wilson, K; Winslow, L; Zimmermann, S; Zucchelli, S
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10281/392588
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