论文标题

Cuore实验的新结果

New results from the CUORE experiment

论文作者

Giachero, A., Adams, D. Q., Alduino, C., Alfonso, K., Avignone III, F. T., Azzolini, O., Bari, G., Bellini, F., Benato, G., Biassoni, M., Branca, A., Brofferio, C., Bucci, C., Camilleri, J., Caminata, A., Campani, A., Canonica, L., Cao, X. G., Capelli, S., Cappelli, L., Cardani, L., Carniti, P., Casali, N., Celi, E., Chiesa, D., Clemenza, M., Copello, S., Cosmelli, C., Cremonesi, O., Creswick, R. J., D'Addabbo, A., Dafinei, I., Davis, C. J., Dell'Oro, S., Di Domizio, S., Dompè, V., Fang, D. Q., Fantini, G., Faverzani, M., Ferri, E., Ferroni, F., Fiorini, E., Franceschi, M. A., Freedman, S. J., Fu, S. H., Fujikawa, B. K., Gironi, L., Giuliani, A., Gorla, P., Gotti, C., Gutierrez, T. D., Han, K., Heeger, K. M., Huang, R. G., Huang, H. Z., Johnston, J., Keppel, G., Kolomensky, Yu. G., Ligi, C., Ma, L., Ma, Y. G., Marini, L., Maruyama, R. H., Mayer, D., Mei, Y., Moggi, N., Morganti, S., Napolitano, T., Nastasi, M., Nikkel, J., Nones, C., Norman, E. B., Nucciotti, A., Nutini, I., O'Donnell, T., Ouellet, J. L., Pagan, S., Pagliarone, C. E., Pagnanini, L., Pallavicini, M., Pattavina, L., Pavan, M., Pessina, G., Pettinacci, V., Pira, C., Pirro, S., Pozzi, S., Previtali, E., Puiu, A., Rosenfeld, C., Rusconi, C., Sakai, M., Sangiorgio, S., Schmidt, B., Scielzo, N. D., Sharma, V., Singh, V., Sisti, M., Speller, D., Surukuch, P. T., Taffarello, L., Terranova, F., Tomei, C., Vetter, K., Vignati, M., Wagaarachchi, S. L., Wang, B. S., Welliver, B., Wilson, J., Wilson, K., Winslow, L. A., Zimmermann, S., Zucchelli, S.

论文摘要

罕见事件的低温地下观测站(Cuore)是第一个低温实验,寻找中准less double-beta($0νβ$)衰变,它已经能够达到一顿量表。该探测器位于意大利的实验室Nazionali del Gran Sasso,由988 TEO $ _2 $晶体组成,该晶体以19座塔的紧凑型圆柱结构排列。在2016年8月探测器建设完成后,Cuore于2017年以大约10 mk的基本温度开始了其首次物理数据运行。在2018年进行了多次优化活动之后,Cuore目前处于稳定的操作模式。在2019年,Cuore发布了2 \ TextSuperScript {nd}搜索$0νβ$的结果,其teo $ _2 $暴露于372.5 kg $ \ cdot $ yr和中位数排除敏感性,对$^{130} $ te $0νββ$ decay的中位数敏感性。我们没有发现$0νβ$衰减的证据,并设置了90 \%c.i。 (可信度间隔)$ 3.2 \ cdot 10^{25} $ yr $^{130} $ te $0νββ$ decay半衰期的贝叶斯下限。在这项工作中,我们介绍了Cuore搜索$0νββ$的当前状态,并回顾了检测器性能。最后,我们给出了Cuore背景模型的更新以及$^{130} $ TE的测量值两个中微子双β($2νββ$)衰减的半衰期。

The Cryogenic Underground Observatory for Rare Events (CUORE) is the first cryogenic experiment searching for neutrinoless double-beta ($0νββ$) decay that has been able to reach the one-ton scale. The detector, located at the Laboratori Nazionali del Gran Sasso in Italy, consists of an array of 988 TeO$_2$ crystals arranged in a compact cylindrical structure of 19 towers. Following the completion of the detector construction in August 2016, CUORE began its first physics data run in 2017 at a base temperature of about 10 mK. Following multiple optimization campaigns in 2018, CUORE is currently in stable operating mode. In 2019, CUORE released its 2\textsuperscript{nd} result of the search for $0νββ$ with a TeO$_2$ exposure of 372.5 kg$\cdot$yr and a median exclusion sensitivity to a $^{130}$Te $0νββ$ decay half-life of $1.7\cdot 10^{25}$ yr. We find no evidence for $0νββ$ decay and set a 90\% C.I. (credibility interval) Bayesian lower limit of $3.2\cdot 10^{25}$ yr on the $^{130}$Te $0νββ$ decay half-life. In this work, we present the current status of CUORE's search for $0νββ$, as well as review the detector performance. Finally, we give an update of the CUORE background model and the measurement of the $^{130}$Te two neutrino double-beta ($2νββ$) decay half-life.

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