Measurement of Solar pp Neutrino Flux using Electron Recoil Data from PandaX-4T Commissioning Run

PandaX Collaboration,Xiaoying Lu,Abdusalam Abdukerim,Zihao Bo,Wei Chen,Xun Chen,Yunhua Chen,Chen Cheng,Zhaokan Cheng,Xiangyi Cui,Yingjie Fan,Deqing Fang,Lisheng Geng,Karl Giboni,Xuyuan Guo,Chencheng Han,Ke Han,Changda He,Jinrong He,Di 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,Manbin Shen,Lin Si,Wenliang Sun,Yi Tao,Anqing Wang,Meng Wang,Qiuhong Wang,Shaobo Wang,Siguang Wang,Wei Wang,Xiuli Wang,Xu Wang,Zhou Wang,Yuehuan Wei,Mengmeng Wu,Weihao Wu, Yuan Wu,Mengjiao Xiao,Xiang Xiao, Kaizhi Xiong,Binbin Yan,Xiyu Yan,Yong Yang,Chunxu Yu,Ying Yuan,Zhe Yuan, Youhui Yun,Xinning Zeng,Minzhen Zhang,Peng Zhang,Shibo Zhang,Shu Zhang,Tao Zhang,Wei Zhang,Yang Zhang,Yingxin Zhang,Yuanyuan Zhang,Li Zhao,Jifang Zhou,Ning Zhou,Xiaopeng Zhou,Yubo Zhou, Zhizhen Zhou

arxiv（2024）

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Abstract

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%). In this paper, we present the first result to measure the solar pp neutrinos in the electron recoil energy range from 24 to 144 keV, using the PandaX-4T commissioning data with 0.63 tonne×year exposure. The pp neutrino flux is determined to be (8.0 ± 3.9 (stat)± 10.0 (syst) )× 10^10s^-1cm^-2, consistent with Standard Solar Model and existing measurements, corresponding to a flux upper limit of 23.3× 10^10s^-1cm^-2 at 90% C.L..

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