用非磁化探测器测量反中微子束的中微子分量
Measurement of the neutrino component of an anti-neutrino beam observed by a non-magnetized detector
摘要：
采用两种独立的方法测量MiniBooNE探测器观测到的反中微子模束流的中微子通量。第一种方法比较数据模拟事件率在一个高纯度的$\numu$诱导的充电电流单$\pip$（CC 1 $\pip$）样品，而第二个利用的角分布之间的差异，在$\numu$和$\numub$充电电流准弹性（CCQE）相互作用创建的μ子。这两种分析的结果都表明，对主要反中微子束的中微子通量分量的预测被高估了-CC 1 $\pip$分析表明，预测的$\numu$通量应按$0.76 \pm 0.11$缩放，而CCQE角拟合产生$0.65 \pm 0.23$。通过对重构中微子能箱的重复分析，对通量预测的能谱进行了检验，结果表明能谱形状很好地模拟了通量预测。这些分析是测量未来非磁化探测器观测到的反中微子束的中微子污染的技术的示范。
英文摘要：
Two independent methods are employed to measure the neutrino flux of the anti-neutrino-mode beam observed by the MiniBooNE detector. The first method compares data to simulated event rates in a high purity $\numu$ induced charged-current single $\pip$ (CC1$\pip$) sample while the second exploits the difference between the angular distributions of muons created in $\numu$ and $\numub$ charged-current quasi-elastic (CCQE) interactions. The results from both analyses indicate the prediction of the neutrino flux component of the pre-dominately anti-neutrino beam is over-estimated - the CC1$\pip$ analysis indicates the predicted $\numu$ flux should be scaled by $0.76 \pm 0.11$, while the CCQE angular fit yields $0.65 \pm 0.23$. The energy spectrum of the flux prediction is checked by repeating the analyses in bins of reconstructed neutrino energy, and the results show that the spectral shape is well modeled. These analyses are a demonstration of techniques for measuring the neutrino contamination of anti-neutrino beams observed by future non-magnetized detectors.
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