New results from the CUORE experiment


الملخص بالإنكليزية

The Cryogenic Underground Observatory for Rare Events (CUORE) is the first cryogenic experiment searching for neutrinoless double-beta ($0 ubetabeta$) 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 2textsuperscript{nd} result of the search for $0 ubetabeta$ with a TeO$_2$ exposure of 372.5 kg$cdot$yr and a median exclusion sensitivity to a $^{130}$Te $0 ubetabeta$ decay half-life of $1.7cdot 10^{25}$ yr. We find no evidence for $0 ubetabeta$ decay and set a 90% C.I. (credibility interval) Bayesian lower limit of $3.2cdot 10^{25}$ yr on the $^{130}$Te $0 ubetabeta$ decay half-life. In this work, we present the current status of CUOREs search for $0 ubetabeta$, 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 ($2 ubetabeta$) decay half-life.

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