Reactor neutrino liquid xenon coherent elastic scattering experiment

作者：Chang Cai, Guocai Chen, Jiangyu Chen, Rundong Fang, Fei Gao, Xiaoran Guo, Ji-Heng Guo, Tingyi He, Chengjie Jia, Gaojun Jin, Yipin Jing, Gaojun Ju, Lei Yang, Jiayi Li, K. Li, Meng Li, Minhua Li, S. Li, Siyin Li, T. Li, Qing Lin, Jiajun Liu, Minghao Liu, Shuyao Lv, Guang Luo, Jian Ma, Chuanping Shen, Mingzhuo Song, Lijun Tong, Xiaoyu Wang, Wei Wang, Xiao-Ping Wang, Zihu Wang, Y. Wei, Liming Weng, Xiang Xiao, Lingfeng Xie, Dacheng Xu, Jijun Yang, Litao Yang, Long Yang, Ye J, Jiachen Yu, Yue Qian, Yuyong Yue, Bingwei Zhang, Shuhao Zhang, Yifei Zhao, Chenhui Zhu · 发表于：Physical review. D/Physical review. D. · 年份：2024 · DOI：10.1103/physrevd.110.072011 · 被引用次数：17 · 研究领域：Neutrino Physics Research、Dark Matter and Cosmic Phenomena、Astrophysics and Cosmic Phenomena

Coherent elastic neutrino-nucleus scattering ( CE ν NS ) provides a unique probe for neutrino properties beyond the Standard Model physics. The reactor neutrino liquid xenon coherent scattering experiment (RELICS), a proposed reactor neutrino program using liquid xenon time projection chamber technology, aims to investigate the CE ν NS process of antineutrinos off xenon atomic nuclei. In this work, the design of the experiment is studied and optimized based on Monte Carlo simulations. To achieve a sufficiently low-energy threshold for CE ν NS 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 photoelectrons in the CE ν NS 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 30 kg · yr exposure at a baseline of 25 m from a reactor core with a 3 GW thermal power. In an energy range of 120–300 photoelectrons, 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 CE ν NS 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 RE...