Search for double-beta decay of $$\mathrm {^{130}Te}$$ to the $$0^+$$ states of $$\mathrm {^{130}Xe}$$ with CUORE
Search for double-beta decay of $$\mathrm {^{130}Te}$$ to the $$0^+$$ states of $$\mathrm {^{130}Xe}$$ with CUORE
复制标题
使用 CUORE 搜索 $$mathrm {^{130}Te}$$ 到 $$mathrm {^{130}Xe}$$ 的 $$0^ $$ 状态的双贝塔衰变
DOI：
10.1140/epjc/s10052-021-09317-z
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Branca, A.
中科院分区：
文献类型：
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作者：
Adams, D. Q.;Alduino, C.;Alfonso, K.;Avignone, F. T.;Azzolini, O.;Bari, G.;Bellini, F.;Benato, G.;Biassoni, M.;Branca, A.
CUORE实验是在同位素中寻找违反无中微子双β衰变（）的轻子数的大型辐射热测量阵列。在这项工作中，我们提出了对双β衰变（DBD）的两个搜索的最新结果：衰变和标准模型允许的双中微子双β衰变（）。这两项搜索都是基于372.5 kgyr的辐射。受激Xe核在终态发出的去激发伽马射线产生一个独特的特征，可以在低背景下通过研究两个或多个测热计中的同步事件来寻找。在这方面，CUORE晶体的紧密排列构成了显著的优势。在给定搜索的90%可信区间（ci）中，估计了衰减和衰减的中位数限制设置灵敏度。没有观察到任何一种衰减模式的显著证据，并且在ci上存在贝叶斯下界。在衰变上得到的半衰期为：对于模态和对于模态。这代表了对te到激发态的DBD的最严格限制，并在一定程度上改进了先前对该过程的结果。
The CUORE experiment is a large bolometric array searching for the lepton number violating neutrino-less double beta decay () in the isotope. In this work we present the latest results on two searches for the double beta decay (DBD) ofto the firstexcited state of: thedecay and the Standard Model-allowed two-neutrinos double beta decay (). Both searches are based on a 372.5 kgyr TeOexposure. The de-excitation gamma rays emitted by the excited Xe nucleus in the final state yield a unique signature, which can be searched for with low background by studying coincident events in two or more bolometers. The closely packed arrangement of the CUORE crystals constitutes a significant advantage in this regard. The median limit setting sensitivities at 90% Credible Interval (C.I.) of the given searches were estimated asfor thedecay andfor thedecay. No significant evidence for either of the decay modes was observed and a Bayesian lower bound atC.I. on the decay half lives is obtained as:for themode andfor themode. These represent the most stringent limits on the DBD ofTe to excited states and improve by a factorthe previous results on this process.