Sensitivity of next-generation tritium beta-decay experiments for keV-scale sterile neutrinos
Sensitivity of next-generation tritium beta-decay experiments for keV-scale sterile neutrinos
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DOI：
10.1088/1475-7516/2015/02/020
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发表时间：
2014-09
影响因子：
6.4
通讯作者：
S. Mertens;S. Mertens;T. Lasserre;S. Groh;G. Drexlin;F. Glück;A. Huber;A. Poon;M. Steidl;N. Steinbrink;C. Weinheimer
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文献类型：
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作者：
S. Mertens;S. Mertens;T. Lasserre;S. Groh;G. Drexlin;F. Glück;A. Huber;A. Poon;M. Steidl;N. Steinbrink;C. Weinheimer
本文研究了氚β衰变实验对keV级无菌中微子的灵敏度。keV质量范围内的残余无菌中微子可以对宇宙的冷暗物质和暖暗物质含量做出贡献。这项工作表明，一个类似于正在建设中的KATRIN实验的大规模氚β衰变实验，可以达到sin 2 θ <$10 −8的活性-无菌中微子混合的统计灵敏度。研究了氚β衰变谱理论修正中的不确定性对测量灵敏度的影响，发现不确定性对测量灵敏度没有显著影响。它表明，控制不相关的系统效应将是在这样的实验中的主要挑战之一。
We investigate the sensitivity of tritium β-decay experiments for keV-scale sterile neutrinos. Relic sterile neutrinos in the keV mass range can contribute both to the cold and warm dark matter content of the universe. This work shows that a large-scale tritium beta-decay experiment, similar to the KATRIN experiment that is under construction, can reach a statistical sensitivity of the active-sterile neutrino mixing of sin2θ ∼ 10−8. The effect of uncertainties in the known theoretical corrections to the tritium β-decay spectrum were investigated, and found not to affect the sensitivity significantly. It is demonstrated that controlling uncorrelated systematic effects will be one of the main challenges in such an experiment.