论文标题
使用第一个katrin数据搜索Kev-Scale无菌中微子
Search for keV-scale Sterile Neutrinos with first KATRIN Data
论文作者
论文摘要
在这项工作中，我们提出了Katrin实验的第一个trium-neutrino搜索，该搜索是在2018年的调试运行中获得的第一个Tritium数据。Katrin对Tritium $β$β$ -decay Spectrum进行了光谱测量，其主要目的是直接确定有效的电子抗智力抗体质量。在此调试阶段，A较低的triust活动有助于搜索无菌中微子，质量为$ 1.6 \，\ Mathrm {Kev} $。我们找不到信号，而是对无菌性的混合振幅设定了排除限制，降低至$ \ sin^2θ<5 \ cdot10^{ - 4} $（$ 95 \，\％$ c.l.），改善了当前实验室基于实验室的界限，在0.1和$ 1.0和$ 1.0和$ 1.0和$ \ $ n verniletile-neutrino质量范围内。
In this work we present a keV-scale sterile-neutrino search with the first tritium data of the KATRIN experiment, acquired in the commissioning run in 2018. KATRIN performs a spectroscopic measurement of the tritium $β$-decay spectrum with the main goal of directly determining the effective electron anti-neutrino mass. During this commissioning phase a lower tritium activity facilitated the search for sterile neutrinos with a mass of up to $1.6\, \mathrm{keV}$. We do not find a signal and set an exclusion limit on the sterile-to-active mixing amplitude of down to $\sin^2θ< 5\cdot10^{-4}$ ($95\,\%$ C.L.), improving current laboratory-based bounds in the sterile-neutrino mass range between 0.1 and $1.0\, \mathrm{keV}$.
