| THE PHYSICS OF ELEMENTARY PARTICLES AND FIELDS |
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A Search for Solar Axions and Anomalous Neutrino Magnetic Moment with the Complete PandaX-II Data |
| Xiaopeng Zhou2, Xinning Zeng1, Xuyang Ning1, Abdusalam Abdukerim1, Wei Chen1, Xun Chen1,3, Yunhua Chen4, Chen Cheng5, Xiangyi Cui6, Yingjie Fan7, Deqing Fang8, Changbo Fu8, Mengting Fu9, Lisheng Geng2,10, Karl Giboni1, Linhui Gu1, Xuyuan Guo4, Ke Han1*, Changda He1, Di Huang1, Yan Huang4, Yanlin Huang11, Zhou Huang1, Xiangdong Ji12, Yonglin Ju13, Shuaijie Li6, Huaxuan Liu13, Jianglai Liu1,6,3†, Xiaoying Lu14, Wenbo Ma1, Yugang Ma8,15, Yajun Mao9, Yue Meng1,3, Kaixiang Ni1, Jinhua Ning4, Xiangxiang Ren14, Changsong Shang4, Guofang Shen2, Lin Si1, Andi Tan12, Anqing Wang14, Hongwei Wang15,16, Meng Wang14, Qiuhong Wang15, Siguang Wang9, Wei Wang5, Xiuli Wang13, Zhou Wang1,3, Mengmeng Wu5, Shiyong Wu4, Weihao Wu1, Jingkai Xia1, Mengjiao Xiao12,17, Pengwei Xie6, Binbin Yan1, Jijun Yang1, Yong Yang1, Chunxu Yu7, Jumin Yuan14, Ying Yuan1, Dan Zhang12, Tao Zhang1, Li Zhao1, Qibin Zheng11, Jifang Zhou4, and Ning Zhou1* (PandaX-II Collaboration) |
1INPAC, School of Physics and Astronomy, Shanghai Jiao Tong University, and Shanghai Key Laboratory for Particle Physics and Cosmology, Shanghai 200240, China
2School of Physics, Beihang University, Beijing 100191, China
3Shanghai Jiao Tong University Sichuan Research Institute, Chengdu 610213, China
4Yalong River Hydropower Development Company, Ltd., 288 Shuanglin Road, Chengdu 610051, China
5School of Physics, Sun Yat-Sen University, Guangzhou 510275, China
6Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai 200240, China
7School of Physics, Nankai University, Tianjin 300071, China
8Key Laboratory of Nuclear Physics and Ion-Beam Application (MOE), Institute of Modern Physics, Fudan University, Shanghai 200433, China
9School of Physics, Peking University, Beijing 100871, China
10International Research Center for Nuclei and Particles in the Cosmos & Beijing Key Laboratory of Advanced Nuclear Materials and Physics, Beihang University, Beijing 100191, China
11School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
12Department of Physics, University of Maryland, College Park, Maryland 20742, USA
13School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
14School of Physics and Key Laboratory of Particle Physics and Particle Irradiation (MOE), Shandong University, Jinan 250100, China
15Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
16Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
17Center for High Energy Physics, Peking University, Beijing 100871, China
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| Cite this article: |
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Xiaopeng Zhou, Xinning Zeng, Xuyang Ning et al 2021 Chin. Phys. Lett. 38 011301 |
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Abstract We report a search for new physics signals using the low energy electron recoil events in the complete data set from PandaX-II, in light of the recent event excess reported by XENON1T. The data correspond to a total exposure of 100.7 ton$\cdot$day with liquid xenon. With robust estimates of the dominant background spectra, we perform sensitive searches on solar axions and neutrinos with enhanced magnetic moment. It is found that the axion-electron coupling $g_{\rm Ae} < 4.6\times 10^{-12}$ for an axion mass less than 0.1 keV/$c^2$ and the neutrino magnetic moment $\mu_{\nu} < 4.9\times 10^{-11}\mu_{\rm B}$ at 90% confidence level. The observed excess from XENON1T is within our experimental constraints.
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Received: 22 December 2020
Published: 29 December 2020
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| Fund: Supported in part by the National Key R&D Program of China (Grant No. 2016YFA0400301), the National Natural Science Foundation of China (Grant Nos. 11525522, 11775141, and 11755001), the Double First Class Plan of the Shanghai Jiao Tong University, the China Postdoctoral Science Foundation (Grant No. 2018M640036), the Office of Science and Technology, Shanghai Municipal Government (Grant Nos. 11DZ2260700, 16DZ2260200, and 18JC1410200), and the Key Laboratory for Particle Physics, Astrophysics and Cosmology, Ministry of Education, for important support. We also thank the sponsorship from the Chinese Academy of Sciences Center for Excellence in Particle Physics (CCEPP), the Hongwen Foundation in Hong Kong, and the Tencent Foundation in China. |
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