论文标题
搜索$^{64} $ Zn和$^{70} $ Zn的$^{64}
Search for Neutrino-less Double Beta Decay of $^{64}$Zn and $^{70}$Zn with CUPID-0
论文作者
论文摘要
Cupid-0是Cupid的第一个试点实验，Cupid是一个下一代项目，寻找无中微子的双β衰减。 Cupid-0在第一次科学运行中操作了26个ZnSe低温量热量器与地下实验室Nazionali del Gran Sasso中的光检测器结合在一起。在这项工作中，我们分析了11.34千克$ \ times $ yr的ZNSE暴露，以搜索$^{70} $ Zn的无中微子双β衰减，以及用于$^{64} $ Zn的无中微子positrino-pociTron-positron-positron-emittron-ext。我们没有发现这些衰变的证据，并设置90 $ \％$可信的间隔限制为$ {\ rm t} _ {1/2}^{0νββ}（^{70} {70} {\ rm zn}）> 1.6 \ times> 1.6 \ times 10^{21}}} $ yr和$ yr和$ yr和$ {\ rm t} {1/ β+}（^{64} {\ rm zn}）> 1.2 \ times 10^{22} $ yr，超过几乎两个数量级，先前的实验结果
CUPID-0 is the first pilot experiment of CUPID, a next-generation project searching for neutrino-less double beta decay. In its first scientific run, CUPID-0 operated 26 ZnSe cryogenic calorimeters coupled to light detectors in the underground Laboratori Nazionali del Gran Sasso. In this work, we analyzed a ZnSe exposure of 11.34 kg$\times$yr to search for the neutrino-less double beta decay of $^{70}$Zn and for the neutrino-less positron-emitting electron capture of $^{64}$Zn. We found no evidence for these decays and set 90$\%$ credible interval limits of ${\rm T}_{1/2}^{0νββ}(^{70}{\rm Zn}) > 1.6 \times 10^{21}$ yr and ${\rm T}_{1/2}^{0νEC β+}(^{64}{\rm Zn}) > 1.2 \times 10^{22}$ yr, surpassing by almost two orders of magnitude the previous experimental results
