Status of the CUORE and results from the CUORE-0 neutrinoless double beta decay experiments

Sisti, M.; Artusa, D. R.; Avignone, F. T.; Azzolini, O.; Balata, M.; Banks, Thomas; Bari, G.; Beeman, J. W.; Bellini, F.; Bersani, A.; Biassoni, M.; Brofferio, C.; Bucci, C.; Cai, X. Z.; Camacho, A.; Caminata, A.; Canonica, L.; Cao, X. G.; Capelli, S.; Cappelli, L.; Carbone, L.; Cardani, L.; Casali, N.; Cassina, L.; Chiesa, D.; Chott, N.; Clemenza, M.; Copello, S.; Cosmelli, C.; Cremonesi, O.; Creswick, R. J.; Cushman, J. S.; Dafinei, I.; Dally, A.; Datskov, V.; Dell’Oro, S.; Deninno, M. M.; Domizio, S. Di; Vacri, M. L. Di; Drobizhev, A.; Ejzak, L.; Fang, Deqing; Farach, Horácio A.; Faverzani, M.; Fernandes, G.; Ferri, E.; Ferroni, F.; Fiorini, E.; Franceschi, M. A.; Freedman, S. J.; Fujikawa, B. K.; Giachero, A.; Gironi, L.; Giuliani, A.; Gorla, P.; Gotti, C.; Gutierrez, T. D.; Haller, E. E.; Han, K.; Heeger, K. M.; Hennings‐Yeomans, R.; Hickerson, K. P.; Huang, H. Z.; Kadel, R.W.; Keppel, G.; Kolomensky, Yu. G.; Li, Y.L.; Ligi, C.; Lim, K. E.; Liu, X.; Ma, Yugang; Maiano, C.; Maino, M.; Martínez, M.; Maruyama, R.; Mei, Y.; Moggi, N.; Morganti, S.; Napolitano, T.; Nastasi, M.; Nisi, S.; Nones, C.; Norman, E. B.; Nucciotti, A.; O’Donnell, T.; Orio, F.; Orlandi, D.; Ouellet, J. L.; Pagliarone, C.; Pallavicini, M.; Palmieri, V.; Pattavina, L.; Pavan, M.; Pedretti, M.; Pessina, G.; Pettinacci, V.; Piperno, G.; Pira, C.; Pirro, S.; Pozzi, S.; Previtali, E.; Rosenfeld, C.; Rusconi, C.; Sala, Elena; Sangiorgio, S.; Scielzo, N. D.; Smith, Alan Р.; Taffarello, L.; Tenconi, M.; Terranova, F.; Tian, W. D.; Tomei, C.; Trentalange, S.; Ventura, G.; Vignati, M.; Wang, B.S.; Wang, H.W.; Wielgus, L.; Wilson, J. R.; Winslow, L. A.; Wise, T.; Woodcraft, A.; Zanotti, L.; Zarra, C.; Zhang, G.Q.; Zhu, B. X.; Zucchelli, S.

doi:10.48550/arxiv.1502.03653

Cited by 1 publication

(1 citation statement)

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“…Research on neutrinoless double beta decay is a key approach to answer whether neutrinos are Majorana particles and whether the total lepton number is conserved in nature; in addition, 0νββ provides direct information about the absolute neutrino mass scale [1]. Several experiments using different 0νββ isotopes are already running (or are about to begin) to explore the best strategy for 0νββ searches, for example, the 76 Ge-based GERDA experiment [2], the 136 Xe-based EXO-200 experiment [3], the 130 Te-based CUORE experiment [4], the 76 Ge-based MAJORANA experiment [5] and the 136 Xe-based PandaX-III experiment [6]. One formidable challenge of these experimental approaches is their capability to control the backgrounds to the required extremely low levels [1].…”

Section: Introductionmentioning

confidence: 99%

3-D topological signatures and a new discrimination method for single-electron events and 0 νββ events in CdZnTe: A Monte Carlo simulation study

Zeng

Cang

et al. 2017

Nuclear Instruments and Methods in Physics Research Section A:

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In neutrinoless double beta (0νββ) decay experiments, the diversity of topological signatures of different particles provides an important tool to distinguish double beta events from background events and reduce background rates. Aiming at suppressing the single-electron backgrounds which are most challenging, several groups have established Monte Carlo simulation packages to study the topological characteristics of single-electron events and 0νββ events and develop methods to differentiate them. In this paper, applying the knowledge of graph theory, a new topological signature called REF track (Refined Energy-Filtered track) is proposed and proven to be an accurate approximation of the real particle trajectory. Based on the analysis of the energy depositions along the REF track of single-electron events and 0νββ events, the REF energy deposition models for both events are proposed to indicate the significant differences between them. With these differences, this paper presents a new discrimination method, which, in the Monte Carlo simulation, achieved a single-electron rejection factor of 93.8 ± 0.3 (stat.)% as well as a 0νββ efficiency of 85.6 ± 0.4 (stat.)% with optimized parameters in CdZnTe.

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