Latest results from the CUORE experiment

被引：0
|
作者：
Campani, A. [1 ,2 ]
机构：
[1] Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy
[2] INFN, Sez Genova, I-16146 Genoa, Italy
来源：
NUOVO CIMENTO C-COLLOQUIA AND COMMUNICATIONS IN PHYSICS | 2021年 / 44卷 / 06期
基金：
欧盟地平线“2020”; 美国国家科学基金会;
关键词：
D O I：
10.1393/ncc/i2021-21180-8
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The Cryogenic Underground Observatory for Rare Events (CUORE) is a tonne-scale experiment located at the Laboratori Nazionali del Cran Sasso that exploits . the bolometric technique to search for neutrinoless double beta (0 nu beta beta) decay of Te-130. Its detector consists of an array of 988 natural TeO2 crystals grouped into 19 towers. With a total active mass of 742 kg (similar to 206 kg of Te-130), CUORE is kept at a very low temperature (similar to 10 mK) by means of a powerful custom made dilution refrigerator. Data taking started at the beginning of 2017. Following several optimization campaigns in 2018 and early 2019, CUORE is currently in stable operating mode. After a brief introduction on the 0 nu beta beta decay mechanism and the CUORE detector, we focus on the second CUORE 0 nu beta beta result attained with an accumulated exposure of 372.5 kg . yr and a median exclusion sensitivity of 1.7. 10(25) yr. No evidence of 0 nu beta beta signal was observed and a lower limit of 3.2 .10(25) yr at the 90% Credibility Interval (C.I.) on the Te-130 half-life for this process was set. Finally, we discuss a new measurement of the Te-130 2 nu beta beta half-life obtained with an improved model of CUORE background and present the CUORE future perspectives.
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页数：6
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