Atmospheric neutrino oscillation analysis with external constraints in Super-Kamiokande I-IV
Atmospheric neutrino oscillation analysis with external constraints in Super-Kamiokande I-IV
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DOI：
10.1103/physrevd.97.072001
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发表时间：
2018-04-03
影响因子：
5
通讯作者：
Minamino, A.
中科院分区：
文献类型：
--
作者：
Abe, K.;Bronner, C.;Minamino, A.
从所有四个运行周期的超级神冈优化的中微子质量层次的灵敏度的大气中微子数据的分析。基于大气中微子数据，给出了正常中微子质量等级和反中微子质量等级假设下Delta m（3）（2）（2），sin（2）theta（23），sin（2）theta（13）和（delta（cp）的置信区间。在大气中微子拟合中加入了来自反应堆数据对θ（1）（3）的额外约束，以及来自已发表的关于μ子中微子消失和电子中微子出现的分箱T2 K数据的额外约束，以增强对上述参数的约束。在90%置信水平下允许的参数范围内，基于Super-Kamiokande + T2 K组合结果，正常质量等级的支持率为91.9%至94.5%。
An analysis of atmospheric neutrino data from all four run periods of Super-Kamiokande optimized for sensitivity to the neutrino mass hierarchy is presented. Confidence intervals for Delta m(3)(2)(2), sin(2) theta(23), sin(2) theta(13) and (delta(cp) are presented for normal neutrino mass hierarchy and inverted neutrino mass hierarchy hypotheses, based on atmospheric neutrino data alone. Additional constraints from reactor data on theta(1)(3) and from published binned T2K data on muon neutrino disappearance and electron neutrino appearance are added to the atmospheric neutrino fit to give enhanced constraints on the above parameters. Over the range of parameters allowed at 90% confidence level, the normal mass hierarchy is favored by between 91.9% and 94.5% based on the combined Super-Kamiokande plus T2K result.