T2K振荡分析的细节

Proceedings of The 21st international workshop on neutrinos from accelerators — PoS(NuFact2019) Pub Date : 2020-06-11 DOI:10.22323/1.369.0037

C. Bronner

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引用次数: 2

摘要

在T2K中研究中微子振荡，通过比较远探测器的观测数据和不同假设的预测来进行统计推断。这些预测是利用实验模型做出的，该模型由一组模型和模拟数据构建而成，用于预测到达探测器的中微子通量，并描述中微子相互作用以及探测器的响应。利用对应于在中微子模式下1.49$\乘以10^{21}$质子对靶(POT)和在反中微子模式下1.63 $\乘以10^{21}$ POT的数据，T2K在2$\sigma$水平上排除了中微子振荡中CP对称性守恒。与其中一个样本中的预测相比，观察到的事件的过量对这一结果有很大的贡献，并且发现在5个分析样本中的1个中观察到这种过量的p值介于5.8%和11.3%之间，这取决于所假设的振荡参数的值。

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Details of T2K Oscillation Analysis

Neutrino oscillations are studied in T2K by comparing the observed data at the far detector to the predictions for different hypotheses to make statistical inferences. The predictions are made using a model of the experiment, constructed from a set of models and simulations tuned to data to predict the neutrino flux reaching the detectors, and describe neutrino interactions as well as the detectors response. Using data corresponding to an exposure of 1.49$\times 10^{21}$ proton on targets (POT) in neutrino mode, and 1.63 $\times 10^{21}$ POT in anti-neutrino mode, T2K excluded conservation of CP symmetry in neutrino oscillation at the 2$\sigma$ level. An excess of observed events compared to the predictions in one of the samples has a strong contribution to this result, and it was found that the p-value to observe such an excess in 1 of the 5 analysis samples was between 5.8\% and 11.3\% depending on the values of the oscillation parameters assumed.

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来源期刊

Proceedings of The 21st international workshop on neutrinos from accelerators — PoS(NuFact2019)

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