Measurement of the tau neutrino cross section in atmospheric neutrino oscillations with Super-Kamiokande
Measurement of the tau neutrino cross section in atmospheric neutrino oscillations with Super-Kamiokande
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DOI：
10.1103/physrevd.98.052006
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发表时间：
2017-11
影响因子：
5
通讯作者：
Z. Li;K. Abe;C. Bronner;Y. Hayato;M. Ikeda;K. Iyogi;J. Kameda;Y. Kato;Y. Kishimoto;L. Marti
中科院分区：
文献类型：
--
作者：
Z. Li;K. Abe;C. Bronner;Y. Hayato;M. Ikeda;K. Iyogi;J. Kameda;Y. Kato;Y. Kishimoto;L. Marti
利用5326天的大气中微子数据，在Super-Kamiokande实验中进行了大气τ中微子出现的搜索。Super-Kamiokande在正常中微子等级的假设下测量τ的归一化为1.47±0.32，相对于中微子振荡的统一预期。结果排除了无tau蛋白出现的假设，显著性水平为4.6σ。在Super-Kamiokande实验中，τ中微子流平均的τ中微子总截面为（0.94±0.20）×10-38 cm ~ 2。测量结果与标准模型的预测一致，在1.5σ内一致。
Using 5326 days of atmospheric neutrino data, a search for atmospheric tau neutrino appearance has been performed in the Super-Kamiokande experiment. Super-Kamiokande measures the tau normalization to be 1.47±0.32 under the assumption of normal neutrino hierarchy, relative to the expectation of unity with neutrino oscillation. The result excludes the hypothesis of no-tau appearance with a significance level of 4.6σ. The inclusive charged-current tau neutrino cross section averaged by the tau neutrino flux at Super-Kamiokande is measured to be (0.94±0.20)×10-38 cm2. The measurement is consistent with the Standard Model prediction, agreeing to within 1.5σ.