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arXiv 2405.05554hep-ex
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反应堆中微子液氙相干弹性散射实验

Reactor neutrino liquid xenon coherent elastic scattering experiment

Chang Cai, Guocai Chen, Jiangyu Chen, Rundong Fang, Fei Gao, Xiaoran Guo, Jiheng Guo, Tingyi He, Chengjie Jia, Gaojun Jin, Yipin Jing, Gaojun Ju, Yang Lei, Jiay… 展开作者

Chang Cai, Guocai Chen, Jiangyu Chen, Rundong Fang, Fei Gao, Xiaoran Guo, Jiheng Guo, Tingyi He, Chengjie Jia, Gaojun Jin, Yipin Jing, Gaojun Ju, Yang Lei, Jiayi Li, Kaihang Li, Meng Li, Minhua Li, Shengchao Li, Siyin Li, Tao Li, Qing Lin, Jiajun Liu, Minghao Liu, Sheng Lv, Guang Luo, Jian Ma, Chuanping Shen, Mingzhuo Song, Lijun Tong, Xiaoyu Wang, Wei Wang, Xiaoping Wang, Zihu Wang, Yuehuan Wei, Liming Weng, Xiang Xiao, Lingfeng Xie, Dacheng Xu, Jijun Yang, Litao Yang, Long Yang, Jingqiang Ye, Jiachen Yu, Qian Yue, Yuyong Yue, Bingwei Zhang, Shuhao Zhang, Yifei Zhao, Chenhui Zhu

AI总结:

本文提出基于液氙时间投影室的反应堆中微子实验RELICS,通过蒙特卡罗模拟优化设计并评估其在低动量转移下探测CEvNS、约束弱混合角及非标准中微子相互作用的潜力。

摘要:

相干弹性中微子-原子核散射(CEvNS)为超出标准模型(BSM)物理中的中微子性质提供了独特的探针。反应堆中微子液氙相干散射实验(RELICS)是一项拟议中的反应堆中微子项目,采用液氙时间投影室(LXeTPC)技术,旨在研究反中微子在氙原子核上的CEvNS过程。本工作基于蒙特卡罗(MC)模拟对实验设计进行了研究与优化。为了实现足够低的CEvNS探测能量阈值,RELICS采用仅电离分析通道。大电离信号之后延迟电子的高发射率是主要本底,导致CEvNS搜索中的分析阈值为120光电子。第二大本底,即宇宙线中子引起的核反冲,通过被动水屏蔽进行抑制。利用距离热功率为3 GW的反应堆堆芯25 m处、曝光量为32 kg*yr的条件,探索了RELICS的物理潜力。在120至300 PE的能量范围内,考虑到液氙响应和探测器相关效应,对应的平均核反冲能量为0.63至1.36 keV,我们预期得到4639.7个CEvNS事例和1687.8个本底事例。研究了RELICS在低动量转移下对弱混合角的灵敏度。我们的研究表明,与当前最佳结果相比,RELICS能够进一步改善对非标准中微子相互作用(NSI)的限制。

英文摘要:

Coherent elastic neutrino-nucleus scattering (CEvNS) provides a unique probe for neutrino properties Beyond the Standard Model (BSM) physics. REactor neutrino LIquid xenon Coherent Scattering experiment (RELICS), a proposed reactor neutrino program using liquid xenon time projection chamber (LXeTPC) technology, aims to investigate the CEvNS process of antineutrinos off xenon atomic nuclei. In this work, the design of the experiment is studied and optimized based on Monte Carlo (MC) simulations. To achieve a sufficiently low energy threshold for CEvNS detection, an ionization-only analysis channel is adopted for RELICS. A high emission rate of delayed electrons after a big ionization signal is the major background, leading to an analysis threshold of 120 photo-electrons in the CEvNS search. The second largest background, nuclear recoils induced by cosmic-ray neutrons, is suppressed via a passive water shield. The physics potential of RELICS is explored with a 32 kg*yr exposure at a baseline of 25 m from a reactor core with a 3 GW thermal power. In an energy range of 120 to 300 PE, corresponding to an average nuclear recoil from 0.63 to 1.36 keV considering the liquid xenon response and detector-related effect, we expect 4639.7 CEvNS and 1687.8 background events. The sensitivity of RELICS to the weak mixing angle is investigated at a low momentum transfer. Our study shows that RELICS can further improve the constraints on the non-standard neutrino interaction (NSI) compared to the current best results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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