Sterile neutrino at the Deep Underground Neutrino Experiment
Sterile neutrino at the Deep Underground Neutrino Experiment
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DOI：
10.1103/physrevd.92.073012
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发表时间：
2015-07
影响因子：
5
通讯作者：
J. Berryman;A. Gouvea;K. Kelly;A. Kobach
中科院分区：
文献类型：
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作者：
J. Berryman;A. Gouvea;K. Kelly;A. Kobach
我们研究了深地下中微子实验（DUNE）探测第四种中微子质量本征态的存在及其影响的潜力。我们研究了第四个质量本征态与标准模型的三个活动中微子的混合，包括新的cp不变性违反源的影响，在很大范围内的新质量平方差，从低于10^-5 eV^2到高于1 eV^2。DUNE对先前未探索的混合角-质量平方差参数空间区域非常敏感。如果存在第四个中微子，在参数空间的某些区域，DUNE能够测量新的振荡参数（有些非常精确），并清楚地识别两个独立的cp不变性破坏源。最后，我们使用了有四个中微子质量特征态的假设，以确定DUNE在多大程度上可以测试三个质量中微子范式的极限。通过这种方式，我们简要地探讨了光无菌中微子是否可以作为其他原则上未知的现象的代理，这些现象可能在长基线中微子振荡实验中表现出来。
We investigate the potential for the Deep Underground Neutrino Experiment (DUNE) to probe the existence and effects of a fourth neutrino mass-eigenstate. We study the mixing of the fourth mass-eigenstate with the three active neutrinos of the Standard Model, including the effects of new sources of CP-invariance violation, for a wide range of new mass-squared differences, from lower than 10^-5 eV^2 to higher than 1 eV^2. DUNE is sensitive to previously unexplored regions of the mixing angle - mass-squared difference parameter space. If there is a fourth neutrino, in some regions of the parameter space, DUNE is able to measure the new oscillation parameters (some very precisely) and clearly identify two independent sources of CP-invariance violation. Finally, we use the hypothesis that there are four neutrino mass-eigenstates in order to ascertain how well DUNE can test the limits of the three-massive-neutrinos paradigm. In this way, we briefly explore whether light sterile neutrinos can serve as proxies for other, in principle unknown, phenomena that might manifest themselves in long-baseline neutrino oscillation experiments.