论文标题
$^{100} $ mo的$0νβ$衰减的最终结果来自cupid-mo实验
Final results on the $0νββ$ decay half-life limit of $^{100}$Mo from the CUPID-Mo experiment
论文作者
论文摘要
在Laboratoire Souterrain de Modane（法国）运营约1。5年后，最近完成了$^{100} $ MO的丘比特-MO实验，以$^{100} $ MO搜索0 $νβ.$衰减。它是丘比特的演示者，下一代0 $νβ$衰减实验。 Cupid-Mo由20个富集的Li $ _2 $$^{100} $ MOO $ _4 $闪烁的热量表组成，每个质量为$ \ sim $ 0.2千克，以$ \ sim $ 20 mk的价格运行。我们在这里提出了最终分析，并通过cupid-mo（$^{100} $ mo暴露于1.47 kg $ \ times $ yr），用于通过0 $ν-β$ decay搜索Lepton数字违规。我们报告了以前的数据子集以来的各种分析改进，并使用这些新技术重新处理所有数据。我们观察到感兴趣区域中的零事件，并对$^{100} $ MO 0 $νββ$ decay $ t^{0ν{0ν} _ {1/2}> 1.8 \ times 10^{24} $年（Stat。在轻度的主要中微子交换机制下，这对应于$ \左<m_ {ββ} \ right> <（0.28 $ - $ 0.49）$ eV的有效主要中微子质量，取决于使用的核基质元素。
The CUPID-Mo experiment to search for 0$νββ$ decay in $^{100}$Mo has been recently completed after about 1.5 years of operation at Laboratoire Souterrain de Modane (France). It served as a demonstrator for CUPID, a next generation 0$νββ$ decay experiment. CUPID-Mo was comprised of 20 enriched Li$_2$$^{100}$MoO$_4$ scintillating calorimeters, each with a mass of $\sim$ 0.2 kg, operated at $\sim$20 mK. We present here the final analysis with the full exposure of CUPID-Mo ($^{100}$Mo exposure of 1.47 kg$\times$yr) used to search for lepton number violation via 0$νββ$ decay. We report on various analysis improvements since the previous result on a subset of data, reprocessing all data with these new techniques. We observe zero events in the region of interest and set a new limit on the $^{100}$Mo 0$νββ$ decay half-life of $T^{0ν}_{1/2} > 1.8 \times 10^{24}$ year (stat.+syst.) at 90% CI. Under the light Majorana neutrino exchange mechanism this corresponds to an effective Majorana neutrino mass of $\left<m_{ββ}\right> < (0.28$--$0.49)$ eV, dependent upon the nuclear matrix element utilized.
