A Measurement of Solar pp Neutrino Flux using PandaX-4T Electron Recoil Data

Xiaoying Lu,Abdusalam Abdukerim,Zihao Bo,Wei Chen,Xun Chen,Chen Cheng,Zhaokan Cheng,Xiangyi Cui,Yingjie Fan,Deqing Fang,Changbo Fu,Mengting Fu,Lisheng Geng,Karl Giboni,Linhui Gu,Xuyuan Guo,Chencheng Han,Ke Han,Changda He,Jinrong He,Di Huang,Yanlin Huang,Junting Huang,Zhou Huang,Ruquan Hou, Yu Hou,Xiangdong Ji,Yonglin Ju,Chenxiang Li,Jiafu Li,Mingchuan Li, Shuaijie Li, Tao Li,Qing Lin,Jianglai Liu, Congcong Lu,Lingyin Luo,Yunyang Luo,Wenbo Ma,Yugang Ma,Yajun Mao,Yue Meng,Xuyang Ning, Binyu Pang,Ningchun Qi,Zhicheng Qian,Xiangxiang Ren,Nasir Shaheed,Xiaofeng Shang, Xiyuan Shao,Guofang Shen,Lin Si,Wenliang Sun,Andi Tan,Yi Tao,Anqing Wang,Meng Wang,Qiuhong Wang,Shaobo Wang,Siguang Wang,Wei Wang,Xiuli Wang,Zhou Wang,Yuehuan Wei,Mengmeng Wu,Weihao Wu,Jingkai Xia,Mengjiao Xiao,Xiang Xiao,Pengwei Xie,Binbin Yan,Xiyu Yan,Jijun Yang,Yong Yang,Yukun Yao,Chunxu Yu, Ying Yuan,Zhe Yuan,Xinning Zeng,Dan Zhang,Minzhen Zhang,Peng Zhang,Shibo Zhang,Shu Zhang,Tao Zhang,Wei Zhang,Yang Zhang,Yingxin Zhang,Yuanyuan Zhang,Li Zhao,Qibin Zheng,Jifang Zhou,Ning Zhou,Xiaopeng Zhou, Yong Zhou,Yubo Zhou

arxiv（2024）

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摘要

The proton-proton (pp) fusion chain dominates the neutrino production from the Sun. The uncertainty of the predicted pp neutrino flux is at the sub-percent level, whereas that of the best measurement is 𝒪(10%). Furthermore, no direct measurement has been made via electron scattering below 165 keV recoil energy. Using the PandaX-4T commissioning data with 0.63 tonne×year of exposure, we perform the first measurement of solar pp neutrinos in the recoil energy range from 24 to 144 keV. The pp neutrino flux is measured to be (10.3 ± 3.7 (stat.)± 9.6 (syst.) )× 10^10s^-1cm^-2, consistent with Standard Solar Model and existing measurements.

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