Sensitivity of Neutrino Mass Experiments to the Cosmic Neutrino Background
Sensitivity of Neutrino Mass Experiments to the Cosmic Neutrino Background
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DOI：
10.1103/physrevd.82.062001
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发表时间：
2010-06
影响因子：
5
通讯作者：
A. Kaboth;J. Formaggio;B. Monreal
中科院分区：
文献类型：
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作者：
A. Kaboth;J. Formaggio;B. Monreal
KATRIN中微子实验是下一代氚β衰变实验，旨在测量90% C. L时电子中微子的质量优于200 meV。由于其强烈的氚源，KATRIN也可以作为中微子捕获过程的可能目标，{nu}{sub e}+{sup 3}H{yields}{sup 3}He{sup +}+e{sup -}。后一个过程没有能量阈值，对宇宙中微子背景（C{nu}B）很敏感。本文探讨了KATRIN实验对残余中微子密度的潜在敏感性。KATRIN实验对C{nu}B超密度比为2.0 × 10 {sup 9}（超过标准一致性模型预测值）（90% C. L）敏感，探讨某些推测性宇宙学模型的有效性
The KATRIN neutrino experiment is a next-generation tritium beta decay experiment aimed at measuring the mass of the electron neutrino to better than 200 meV at 90% C.L. Because of its intense tritium source, KATRIN can also serve as a possible target for the process of neutrino capture, {nu}{sub e}+{sup 3}H{yields}{sup 3}He{sup +}+e{sup -}. The latter process, possessing no energy threshold, is sensitive to the cosmic neutrino background (C{nu}B). In this paper, we explore the potential sensitivity of the KATRIN experiment to the relic neutrino density. The KATRIN experiment is sensitive to a C{nu}B overdensity ratio of 2.0x10{sup 9} over standard concordance model predictions (at 90% C.L.), addressing the validity of certain speculative cosmological models.