Prospects of light sterile neutrino searches in long-baseline neutrino oscillations

Prospects of light sterile neutrino searches in long-baseline neutrino oscillations
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长基线中微子振荡中轻惰性中微子搜索的前景

DOI:
10.1007/jhep06(2020)094
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发表时间:
2019-11
期刊:
JHEP
影响因子:
--
通讯作者:
Chun Liu
Chun Liu
中科院分区:
其他
文献类型:
--
作者:
Yakefu Reyimuaji;Chun Liu

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考虑三个活性中微子和一个轻惰性中微子的框架,讨论了真空和物质中的中微子振荡概率。我们详细研究了重相位不变量和CP不对称可观测量,并研究了长基线中微子实验(例如DUNE、NOνA和T2HK)中的四中微子振荡。结果表明,物质效应在一定能量范围内显着提高了电子中微子和电子反中微子出现通道的振荡概率,而物质效应对CP不对称性分析没有产生明显的变化。此外,有惰性中微子和没有惰性中微子的结果之间的分离并不那么显着,并且也受到CP破坏相的影响。比较这三个实验的结果,它们都有相似的特征,然而,DUNE 中振荡概率的大小和间隔要大一些。
The neutrino oscillation probabilities in vacuum and matter are discussed, considering the framework of three active and one light sterile neutrinos. We study in detail the rephasing invariants and CP asymmetry observables, and investigate the four-neutrino oscillations in long-baseline neutrino experiments, such as DUNE, NOνA and T2HK. Our results show that the matter effect enhances quite a significantly the oscillation probabilities of electron neutrino and electron antineutrino appearance channels within a certain energy range, while no considerable change arises in the CP asymmetry analysis due to the matter effect. Moreover, separation between the results with and without the sterile neutrino is not so significant and that is also affected by CP-violating phases. Comparing the results for these three experiments, all of them have similar features, nevertheless, sizes and separations of the oscillation probabilities in DUNE are bit larger.
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