Final results on neutrino oscillation parameters from the OPERA experiment in the CNGS beam

Final results on neutrino oscillation parameters from the OPERA experiment in the CNGS beam
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CNGS 束中 OPERA 实验的中微子振荡参数的最终结果

DOI:
10.1103/physrevd.100.051301
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发表时间:
2019
期刊:
影响因子:
5
通讯作者:
H. Shibuya et al. (OPERA Collaboration)
H. Shibuya et al. (OPERA Collaboration)
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
N. Agafonova;T. Fukuda;T. Matsuo;S. Mikado;S. Ogawa;H. Shibuya et al. (OPERA Collaboration)

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OPERA实验已经最终观察到介子中微子CNGS束中tau中微子的出现。利用OPERA探测器的能力,可以分离出高纯度的带电电流弱中微子相互作用样品,以及中性电流弱相互作用样品。本文首次利用完整数据集对三味中微子振荡模型进行了验证,并在该模型框架内推导出了轻无菌中微子存在的约束条件。首次使用tau和电子中微子外观通道来验证无菌中微子假说。LSND和MiniBooNE实验允许的无菌中微子参数空间的很大一部分在90% C.L.被排除,特别是MiniBooNE结合中微子和反中微子数据得到的最佳拟合值被显著地排除。
The OPERA experiment has conclusively observed the appearance of tau neutrinos in the muon neutrino CNGS beam. Exploiting the OPERA detector capabilities, it was possible to isolate high purity samples of,andcharged current weak neutrino interactions, as well as neutral current weak interactions. In this paper, the full dataset is used for the first time to test the three-flavor neutrino oscillation model and to derive constraints on the existence of a light sterile neutrino within the framework of theneutrino model. For the first time, tau and electron neutrino appearance channels are jointly used to test the sterile neutrino hypothesis. A significant fraction of the sterile neutrino parameter space allowed by LSND and MiniBooNE experiments is excluded at 90% C.L. In particular, the best-fit values obtained by MiniBooNE combining neutrino and antineutrino data are excluded atsignificance.
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