Light sterile neutrino sensitivity at the nuSTORM facility
Light sterile neutrino sensitivity at the nuSTORM facility
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DOI：
10.1103/physrevd.89.071301
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发表时间：
2014-04-09
影响因子：
5
通讯作者：
Winter, W.
中科院分区：
文献类型：
--
作者：
Adey, D.;Agarwalla, S. K.;Winter, W.
一个能够从储存的µ子束的衰变中发射电子束和Muon中微子的设施，有可能明确地解决在短基线中微子振荡实验中出现的轻不育中微子的证据问题，以及从拟合到宇宙学数据对中微子有效数量的估计。在这篇文章中，我们证明了nuSTORM装置，存储了3.8GeV/c+/-10%的Muon，将能够进行决定性的Muon中微子出现搜索不育中微子，并测试LSND和MiniBooNE实验信号的10 sigma灵敏度，即使对系统不确定性的保守估计也是如此。这项实验将极大地增加我们的知识，即轻的稀有中微子对来自原始氦产生的丰富的有效中微子口味的数量的贡献，以及来自宇宙微波背景对中微子能量密度的限制。同时进行的Muon中微子消失分析是对外观搜索的补充，这将有助于各种稀有中微子模型的测试。
A facility that can deliver beams of electron and muon neutrinos from the decay of a stored muon beam has the potential to unambiguously resolve the issue of the evidence for light sterile neutrinos that arises in short-baseline neutrino oscillation experiments and from estimates of the effective number of neutrino flavors from fits to cosmological data. In this paper, we show that the nuSTORM facility, with stored muons of 3.8 GeV/c +/- 10%, will be able to carry out a conclusive muon neutrino appearance search for sterile neutrinos and test the LSND and MiniBooNE experimental signals with 10 sigma sensitivity, even assuming conservative estimates for the systematic uncertainties. This experiment would add greatly to our knowledge of the contribution of light sterile neutrinos to the number of effective neutrino flavors from the abundance of primordial helium production and from constraints on neutrino energy density from the cosmic microwave background. The appearance search is complemented by a simultaneous muon neutrino disappearance analysis that will facilitate tests of various sterile neutrino models.