提高大气中微子L/E分析灵敏度的贝叶斯方法
A Bayesian technique for improving the sensitivity of the atmospheric neutrino L/E analysis
摘要：
本文概述了一种提高大气中微子振荡测量精度的方法。这些振荡的一个实验特征是观测到的$ν_μ$带电电流相互作用速率的不足，其振荡依赖于$L_ν/E_ν$，其中$L_ν$是中微子传播距离，$E_ν$是中微子能量。对于包含的顶点大气中微子相互作用，$L_ν/E_ν$的分辨率显着变化，从事件到事件。通过将关于$L_ν/E_ν$分辨率的信息结合到振荡分析中，可以提高振荡测量的精度。在这里提出的分析中，贝叶斯技术被用来估计观测到的大气中微子的事件的基础上的$L_ν/E_ν$分辨率。通过在振荡分析中将事件分离到$L_ν/E_ν$分辨率的箱中，可以实现振荡灵敏度的显著改进。
英文摘要：
This paper outlines a method for improving the precision of atmospheric neutrino oscillation measurements. One experimental signature for these oscillations is an observed deficit in the rate of $ν_μ$ charged-current interactions with an oscillatory dependence on $L_ν/E_ν$, where $L_ν$ is the neutrino propagation distance, and $E_ν$ is the neutrino energy. For contained-vertex atmospheric neutrino interactions, the $L_ν/E_ν$ resolution varies significantly from event to event. The precision of the oscillation measurement can be improved by incorporating information on $L_ν/E_ν$ resolution into the oscillation analysis. In the analysis presented here, a Bayesian technique is used to estimate the $L_ν/E_ν$ resolution of observed atmospheric neutrinos on an event-by-event basis. By separating the events into bins of $L_ν/E_ν$ resolution in the oscillation analysis, a significant improvement in oscillation sensitivity can be achieved.
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