论文标题
与Cuore的Neut New直接限制$^{128} $ te的中性β衰减半衰期
New direct limit on neutrinoless double beta decay half-life of $^{128}$Te with CUORE
论文作者
论文摘要
意大利INFN的实验室Nazionali del Gran Sasso的稀有事件的低温地下观测站是一个寻找中性s中性beta(0 $νββ$)衰减的实验。它的主要目的是在$^{130} $ te中调查这种衰变,但其量表质量和低背景也使Cuore对其他稀有过程敏感。在这项工作中,我们提出了第一个结果,以搜索$^{128} $ te的\ nbb衰减,这是具有第二高自然同位素丰度的Te同位素。我们找不到这种衰变的证据,使用贝叶斯分析,我们对$^{128} $ te \ nbb衰减的半寿命T $ _ {1/2}> 3.6 \ times 10^{24} $ yr(90 \%CI)设置了下限。这代表了该同位素的半衰期最严格的限制,提高了先前直接搜索结果的因素30,并首次超过了地球化学实验的搜索结果。
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 (0$νββ$) decay. Its main goal is to investigate this decay in $^{130}$Te, but its ton-scale mass and low background make CUORE sensitive to other rare processes as well. In this work, we present our first results on the search for \nbb decay of $^{128}$Te, 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 the $^{128}$Te \nbb decay half-life of T$_{1/2} > 3.6 \times 10^{24}$ yr (90\% CI). This represents the most stringent limit on the half-life of this isotope, improving by over a factor 30 the previous direct search results, and exceeding those from geochemical experiments for the first time.