论文标题
MUON淋浴顶点重建带有波形信息在Juno中
Muon shower vertex reconstruction with waveform information in JUNO
论文作者
论文摘要
江门地下中微子天文台（JUNO）是目前在中国专用的地下实验室中建造的20 k顿液体闪烁体检测器。它是一个多功能地下实验，具有物理计划，包括中微子质量层次结构测定，中微子振荡参数的精确度量，太阳能，大气，地理 - 中微子的测量以及其他重要的中微子物理学搜索。通过测量相关的正电子和中子信号，通过抗β衰减来检测到电子抗神经。在此检测通道中，宇宙射线MUON诱导的放射性同位素是主要背景，尤其是与宇宙基础背景相关的背景（$^{9} $ li/$^{8} $ He和快速中子）。它们主要是通过显示大约10 \％un uns的muons来产生的。考虑到$^{9} $ li/$^{8} $ he背景与时间和空间上的父穆恩相关，因此沿Muon Track的淋浴的顶点重建有助于拒绝$^{9} $^{9} $ li/$ li/$^{8} $的背景。基于波形仿真分析，我们知道PMT中波形输出中的多峰值主要是由这些淋浴引起的。已经研究了基于检测器仿真的淋浴顶点重建的MUON事件的波形分析和初步结果。
The Jiangmen Underground Neutrino Observatory (JUNO) is a 20 kton liquid scintillator detector currently being built in a dedicated underground laboratory in China. It is a multi-purpose underground experiment with a physics program including neutrino mass hierarchy determination, precision measurement of neutrino oscillation parameters, measurement of solar, atmospheric, geo-neutrinos and other important neutrino physics searches. Electron anti-neutrinos are detected via the inverse beta decay by measuring the correlated positron and neutron signals. In this detection channel cosmic ray muon induced radioactive isotopes are the main background, especially those connected to cosmogenic backgrounds ($^{9}$Li/$^{8}$He and fast neutrons). They are predominantly produced by showing muons which account for about 10\% of all muons. Considering that the $^{9}$Li/$^{8}$He background is correlated with the parent muon in time and space, the vertex reconstruction of showers along the muon track is helpful to reject the backgrounds of $^{9}$Li/$^{8}$He and other isotopes. Based on the waveform simulation analysis, we know that the multi-peaks in waveform output by PMTs are mainly caused by these showers. Waveform analysis of muon events and preliminary results of shower vertex reconstruction based on detector simulation have been studied.
