Search for Electron Antineutrino Appearance in a Long-Baseline Muon Antineutrino Beam
Search for Electron Antineutrino Appearance in a Long-Baseline Muon Antineutrino Beam
复制标题
寻找长基线 μ 子反中微子束中电子反中微子的出现
DOI：
10.1103/physrevlett.124.161802
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发表时间：
2020
影响因子：
8.6
通讯作者：
Abe K et al. (T2K Collaboration)
中科院分区：
文献类型：
--
作者：
D.Suzuki;et al.;Abe K et al. (T2K Collaboration)
电子反中微子外观测量的T2 K实验中的加速器产生的反中微子束，使用额外的中微子束操作来约束参数的Pontecorvo-Maki-Nakagawa-Sakata（PMNS）混合矩阵。T2 K观测到15个候选电子反中微子事件，背景预期为9.3个事件。包括从观测事件的运动学分布的信息，没有电子反中微子外观的假设是不赞成的一个意义和数据和PMNS预测之间没有差异被found.A补充分析，引入一个额外的自由参数，允许非PMNS值的电子中微子和反中微子外观也发现数据和PMNS预测之间没有差异。
Electron antineutrino appearance is measured by the T2K experiment in an accelerator-produced antineutrino beam, using additional neutrino beam operation to constrain parameters of the Pontecorvo-Maki-Nakagawa-Sakata (PMNS) mixing matrix. T2K observes 15 candidate electron antineutrino events with a background expectation of 9.3 events. Including information from the kinematic distribution of observed events, the hypothesis of no electron antineutrino appearance is disfavored with a significance ofand no discrepancy between data and PMNS predictions is found. A complementary analysis that introduces an additional free parameter which allows non-PMNS values of electron neutrino and antineutrino appearance also finds no discrepancy between data and PMNS predictions.