New Direct Limit on Neutrinoless Double Beta Decay Half-Life of Te128 with CUORE
New Direct Limit on Neutrinoless Double Beta Decay Half-Life of Te128 with CUORE
复制标题
使用 CUORE 对 Te128 的无中微子双 Beta 衰变半衰期进行新的直接限制
DOI：
10.1103/physrevlett.129.222501
复制
发表时间：
2022
影响因子：
8.6
通讯作者：
Biassoni, M.
中科院分区：
文献类型：
--
作者：
Adams, D. Q.;Alduino, C.;Alfonso, K.;Avignone, F. T.;Azzolini, O.;Bari, G.;Bellini, F.;Benato, G.;Beretta, M.;Biassoni, M.
意大利INFN实验室的低温地下稀有事件天文台(CUORE)是一项寻找无中微子双β()衰变的实验。它的主要目标是研究这种衰变，但它的吨级质量和低本底使CuORE对其他稀有过程也很敏感。在这封信中，我们介绍了我们在寻找天然同位素丰度第二高的Te同位素衰变方面的第一个结果。我们没有找到这种衰变的证据，并且使用贝叶斯分析，我们为(90%可信区间)的衰变半衰期设定了一个下限。这代表了对这种同位素半衰期的最严格限制，比以前的直接搜索结果提高了30倍以上，并首次超过了地球化学实验的结果。
The Cryogenic Underground Observatory for Rare Events (CUORE) at Laboratori Nazionali del Gran Sasso of INFN in Italy is an experiment searching for neutrinoless double beta () decay. Its main goal is to investigate this decay in, but its ton-scale mass and low background make CUORE sensitive to other rare processes as well. In this Letter, we present our first results on the search fordecay of, the Te isotope with the second highest natural isotopic abundance. We find no evidence for this decay, and using a Bayesian analysis we set a lower limit on thedecay half-life of(90% CI). This represents the most stringent limit on the half-life of this isotope, improving by over a factor of 30 the previous direct search results, and exceeding those from geochemical experiments for the first time.