LEGEND: The future of neutrinoless double-beta decay search with germanium detectors
LEGEND: The future of neutrinoless double-beta decay search with germanium detectors
复制标题
图例：使用锗探测器进行无中微子双 β 衰变搜索的未来
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
A. Zsigmond
中科院分区：
文献类型：
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作者：
A. Zsigmond
对无中微子双β (0vββ)衰变的观测将建立轻子数守恒的违反和中微子的马约拉纳性质。它还将约束光-中微子交换机制中的中微子质量层次和尺度。目前使用76Ge进行0vββ衰变搜索的实验，MAJORANA演示器和GERDA在超低背景和能量分辨率方面都处于领先地位。在他们成功的基础上，LEGEND实验将进行改进的搜索，目标是达到超过1028年的半衰期灵敏度。为了实现这一目标，必须将富集锗探测器的质量增加到吨级，并进一步减小背景。LEGEND将采取分阶段的方法，第一阶段预计将于2021年开始，在意大利INFN的lng中运行约200公斤的76ge富集探测器。
The observation of neutrinoless double beta (0vββ) decay would establish both the violation of lepton number conservation and the Majorana nature of the neutrino. It will also constrain the neutrino mass hierarchy and scale in the light-neutrino exchange mechanism. The current experiments using 76Ge for 0vββ decay search, the MAJORANA DEMONSTRATOR and GERDA, lead the field in both the ultra-low background and the energy resolution achieved. Building on their success, the LEGEND experiment will conduct an improved search with the goal of reaching a half-life sensitivity beyond 1028 years. In order to achieve this goal, the enriched Ge detector mass has to be increased up to tonne-scale and the backgrounds further reduced. LEGEND will pursue a phased approach with the first phase expected to start in 2021 with about 200 kg of 76Ge-enriched detectors operating at LNGS of INFN in Italy.