论文标题
在地球表面附近的LARTPC中,高性能中微子检测具有微生子检测器
High-performance Generic Neutrino Detection in a LArTPC near the Earth's Surface with the MicroBooNE Detector
论文作者
论文摘要
大型液体氩时间投影室(LARTPC)在中微子振荡实验中越来越多地采用,因为它们通过在完全活跃的体积中的跟踪和量热法的结合结合了其出色的成像能力。在地球表面或附近的活动LARTPC中微子检测器(例如微酮实验)提出了独特的分析挑战,因为宇宙射线μ子的大量通量和电离电子的缓慢漂移。我们提出了一种新型的基于电线的高性能通用中微子检测技术,该技术在微酮中实现。宇宙射线背景减少了1.4 $ \ times10^{5} $,在选定的中微子候选事件中导致9.7 \%的宇宙污染,可见的能量大于200〜MEV,而中微子信号效率大于200 〜MEV,对于$ c相互作用的$ν_μ$ n versent $ c相互作用,则保留为88.4 \%。与现有的重建算法相比,这显着提高了性能,标志着实现LARTPC中微子振荡实验的科学目标的一个重要里程碑。
Large Liquid Argon Time Projection Chambers (LArTPCs) are being increasingly adopted in neutrino oscillation experiments because of their superb imaging capabilities through the combination of both tracking and calorimetry in a fully active volume. Active LArTPC neutrino detectors at or near the Earth's surface, such as the MicroBooNE experiment, present a unique analysis challenge because of the large flux of cosmic-ray muons and the slow drift of ionization electrons. We present a novel Wire-Cell-based high-performance generic neutrino-detection technique implemented in MicroBooNE. The cosmic-ray background is reduced by a factor of 1.4$\times10^{5}$ resulting in a 9.7\% cosmic contamination in the selected neutrino candidate events, for visible energies greater than 200~MeV, while the neutrino signal efficiency is retained at 88.4\% for $ν_μ$ charged-current interactions in the fiducial volume in the same energy region. This significantly improved performance compared to existing reconstruction algorithms, marks a major milestone toward reaching the scientific goals of LArTPC neutrino oscillation experiments operating near the Earth's surface.