论文标题
Majoraana示威者在$^{76} $ ge中寻找中准less的最终结果
Final Result of the MAJORANA DEMONSTRATOR's Search for Neutrinoless Double-$β$ Decay in $^{76}$Ge
论文作者
论文摘要
Majoraana示威者使用$^{76} $ ge的中性s $ $β$衰减（$0νββ$），使用在低背景屏蔽层中真空低温器中操作的模块化阵列。阵列以高达40.4千克的检测器（27.2 kg富集至$ \ sim $ 88 \％$^{76} $ ge）运行。从这些测量值中，演示者积累了64.5千克的活跃暴露。在2039 kev $ q_ {ββ} $（0.12 \％）的世界领先能源分辨率为2.52 kev fwhm时，我们将$^{76} $ ge in $^{76} $ ge in $ t_ {1/2}}> 8.3 \ 8.3 \ times10^\ times10^{25} $ yr（90）设置了半寿命限制为$^{76} $ ge。这提供了$（113-269）$ MEV（90 \％c.l.）的$ m_ {ββ} $的上限范围，具体取决于核基质元素的选择。
The MAJORANA DEMONSTRATOR searched for neutrinoless double-$β$ decay ($0νββ$) of $^{76}$Ge using modular arrays of high-purity Ge detectors operated in vacuum cryostats in a low-background shield. The arrays operated with up to 40.4 kg of detectors (27.2 kg enriched to $\sim$88\% in $^{76}$Ge). From these measurements, the DEMONSTRATOR has accumulated 64.5 kg yr of enriched active exposure. With a world-leading energy resolution of 2.52 keV FWHM at the 2039 keV $Q_{ββ}$ (0.12\%), we set a half-life limit of $0νββ$ in $^{76}$Ge at $T_{1/2}>8.3\times10^{25}$ yr (90\% C.L.). This provides a range of upper limits on $m_{ββ}$ of $(113-269)$ meV (90\% C.L.), depending on the choice of nuclear matrix elements.
