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Enhanced electron–positron pair production by frequency chirping in one-and two-color laser pulse fields

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Chinese Physics B 2017年第2期26卷 48-55页

作者： nuriman abdukerim zi-liang li bai-song xie College of Nuclear Science and Technology Beijing Normal University Beijing 100875 China School of Physics and Technology Xinjiang University Urumqi 830046 China School of Science China University of Mining and Technology Beijing 100083 China Beijing Radiation Center Beijing 100875 China

Enhanced electron–positron pair production by frequency chirping in one- and two-color laser pulse fields is investigated by solving the quantum Vlasov equation. A small frequency chirp shifts the momentum spectrum along the momentum axis. The positive and negative frequency chirp parameters play the same role in increasing the pair number density. The sign change of the frequency chirp parameter at the moment t = 0 leads the pulse shape and momentum spectrum to be symmetric, and the number density to be increased. The number density of produced pairs in the two-color pulse field is much higher than that in the one-color pulse field and the larger frequency chirp pulse field dominates more strongly. In the two-color pulse fields, the relation between the frequency ratio of two colors and the number density is not sensitive to the parameters of small frequency chirp added in either a low frequency strong field or a high frequency weak field but sensitive to the parameters of large frequency chirp added in a high frequency weak field.

关键词： electron–positron quantum nonlocalization quantum Vlasov equation frequency chirping

超强场下真空产生正负电子对的动理学方法研究及其进展

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物理学进展 2016年第5期36卷 129-156页

作者：李子良努尔曼古丽.阿卜杜克热木谢柏松北京师范大学核科学与技术学院北京100875 中国矿业大学(北京)理学院北京100083 新疆大学物理科学与技术学院乌鲁木齐830046 北京市辐射中心北京100875

随着激光技术的飞速发展,实验室中所能获得的电磁场强度得到了极大的提高,从而使得强外场下真空衰变产生正反粒子对问题再次成为研究热点。不同形状外场下粒子对产生问题的理论研究不但可以加深人们对粒子对产生过程的理解,而且有助于... 详细信息

随着激光技术的飞速发展,实验室中所能获得的电磁场强度得到了极大的提高,从而使得强外场下真空衰变产生正反粒子对问题再次成为研究热点。不同形状外场下粒子对产生问题的理论研究不但可以加深人们对粒子对产生过程的理解,而且有助于指导实验验证真空对产生。本文主要介绍了包括我们近期的工作在内的超强场下真空产生正负电子对的动理学方法研究及其进展。用量子动理学方法研究真空对产生问题有很多优点:不但可以得到产生粒子的数密度,而且能给出产生粒子的相空间信息;此外,还可以处理任意复杂场下的粒子对产生问题,深入研究粒子对产生的物理机制。量子动理学方法也许是探究真实激光场下真空对产生问题的最佳选择之一,有望指导实验首次验证纯光直接转化为物质的过程。

关键词：强场物理真空粒子对产生量子动理学方法

Dark matter direct search sensitivity of the PandaX-4T experiment

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Science China(Physics,Mechanics & Astronomy) 2019年第3期62卷 49-57页

作者： HongGuang Zhang Abdusalam abdukerim Wei Chen Xun Chen YunHua Chen XiangYi Cui BinBin Dong DeQing Fang ChangBo Fu Karl Giboni Franco Giuliani linHui Gu XuYuan Guo ZhiFan Guo Ke Han ChangDa He ShengMing He Di Huang XingTao Huang Zhou Huang Peng Ji XiangDong Ji Yonglin Ju Shaoli li Yao li Heng lin HuaXuan liu JiangLai liu YuGang Ma YaJun Mao KaiXiang Ni JinHua Ning XiangXiang Ren Fang Shi AnDi Tan AnQing Wang Cheng Wang HongWei Wang Meng Wang QiuHong Wang SiGuang Wang Xiuli Wang XuMing Wang Zhou Wang MengMeng Wu ShiYong Wu JingKai Xia MengJiao Xiao PengWei xie BinBin Yan JiJun Yang Yong Yang ChunXu Yu JuMin Yuan JianFeng Yue Dan Zhang Tao Zhang li Zhao QiBin Zheng JiFang Zhou Ning Zhou XiaoPeng Zhou Shanghai Key Laboratory for Particle Physics and Cosmology Institute of Nuclear and Particle Physics (INPC) (INPC) and School of Physics and AstronomyShanghai Jiao Tong University School of Physics and Technology Xinjiang University Shanghai Key Laboratory for Particle Physics and Cosmology Institute of Nuclear and Particle Physics (INPC) and School of Physics and AstronomyShanghai Jiao Tong University Yalong River Hydropower Development Company Ltd. Shanghai Institute of Applied Physics Chinese Academy of Sciences School of Mechanical Engineering Shanghai Jiao Tong University School of Physics and Key Laboratory of Particle Physics and Particle Irradiation(MOE)(MOE) Shandong University School of Physics Nankai University Tsung-Dao Lee Institute School of Physics Peking University Department of Physics University of Maryland College Park School of Physics and Key Laboratory of Particle Physics and Particle Irradiation(MOE) Shandong University Center of High Energy Physics Peking University School of Medical Instrument and Food Engineering University of Shanghai for Science and Technology

The Panda X-4T experiment, a 4-ton scale dark matter direct detection experiment, is being planned at the China Jinping Underground Laboratory. In this paper we present a simulation study of the expected background in this experiment. In a 2.8-ton fiducial mass and the signal region between 1-10 keV electron equivalent energy, the total electron recoil background is found to be 4.9 × 10^(-5) kg^(-1) d^(-1) keV^(-1). The nuclear recoil background in the same region is 2.8 × 10^(-7) kg^(-1) d^(-1) keV^(-1). With an exposure of 5.6 ton-years, the sensitivity of Panda X-4 T could reach a minimum spin-independent dark matter-nucleon cross section of 6 × 10^(-48) cm^2 at a dark matter mass of 40 Ge V/c^2.

关键词： dark matter WIMPs direct detection xenon

An improved evaluation of the neutron background in the PandaX-Ⅱ experiment

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Science China(Physics,Mechanics & Astronomy) 2020年第3期63卷 54-63页

作者： QiuHong Wang Abdusalam abdukerim Wei Chen Xun Chen YunHua Chen XiangYi Cui YingJie Fan DeQing Fang ChangBo Fu liSheng Geng Karl Giboni Franco Giuliani linHui Gu XuYuan Guo Ke Han ChangDa He Di Huang Yan Huang Yanlin Huang Zhou Huang Peng Ji XiangDong Ji Yonglin Ju YiHui Lai Kun liang HuaXuan liu JiangLai liu WenBo Ma YuGang Ma YaJun Mao Yue Meng Parinya Namwongsa KaiXiang Ni JinHua Ning XuYang Ning XiangXiang Ren Changsong Shang lin Si AnDi Tan AnQing Wang HongWei Wang Meng Wang SiGuang Wang Xiuli Wang Zhou Wang MengMeng Wu ShiYong Wu JingKai Xia MengJiao Xiao PengWei xie BinBin Yan JiJun Yang Yong Yang ChunXu Yu Jumin Yuan Dan Zhang HongGuang Zhang Tao Zhang li Zhao QiBin Zheng JiFang Zhou Ning Zhou XiaoPeng Zhou Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China INPAC and School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai Laboratory for Particle Physics and CosmologyShanghai 200240China Yalong River Hydropower Development Company Ltd.Chengdu 610051China School of Physics Nankai UniversityTianjin 300071China School of Physics&International Research Center for Nuclei and Particles in the Cosmos&Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai 200093China Tsung-Dao Lee Institute Shanghai 200240China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Physics Peking UniversityBeijing 100871China Department of Physics University of MarylandCollege ParkMaryland 20742USA School of Physics and Key Laboratory of Particle Physics and Particle Irradiation(MOE) Shandong UniversityJinan 250100China Center of High Energy Physics Peking UniversityBeijing 100871China University of Chinese Academy of Sciences Beijing 100049China

In dark matter direct detection experiments,neutron is a serious source of background,which can mimic the dark matter-nucleus scattering *** this paper,we present an improved evaluation of the neutron background in the PandaX-II dark matter experiment by a novel *** of fully relying on the Monte Carlo simulation,the overall neutron background is determined from the neutron-induced high energy signals in the *** addition,the probability of producing a dark-matter-like background per neutron is evaluated with a complete Monte Carlo generator,where the correlated emission of neutron(s)andγ(s)in the(α,n)reactions and spontaneous fissions is taken into *** this method,the neutron backgrounds in the Run 9(26-ton-day)and Run 10(28-ton-day)data sets of PandaX-II are estimated to be(0.66±0.24)and(0.47±0.25)events,respectively.

关键词： dark matter direct detection xenon neutron background high energy gamma neutron generator

Determination of Double Beta Decay Half-life of 136Xe with the PandaX-4T Natural Xenon Detector

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Research 2023年第2期2022卷 33-41页

作者： lin Si Zhaokan Cheng Abdusalam abdukerim zihao Bo Wei Chen Xun Chen Yunhua Chen Chen Cheng Yunshan Cheng Xiangyi Cui Yingjie Fan Deqing Fang Changbo Fu Mengting Fu lisheng Geng Karl Giboni linhui Gu Xuyuan Guo Ke Han Changda He Jinrong He Di Huang Yanlin Huang Zhou Huang Ruquan Hou Xiangdong Ji Yonglin Ju Chenxiang li Jiafu li Mingchuan li Shu li Shuaijie li Qing lin Jianglai liu Xiaoying Lu lingyin Luo Yunyang Luo Wenbo Ma Yugang Ma Yujun Mao Yue Meng Nasir Shaheed Xiaofeng Shang Xuyang Ning Ningchun Qi Zhicheng Qian Xiangxiang Ren Changsong Shang Guofang Shen 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 Yong Yang Chunxu Yu Jumin Yuan Ying Yuan Zhe Yuan Dan Zhang Minzhen Zhang Peng Zhang Shibo Zhang Shu Zhang Tao Zhang li Zhao Qibin Zheng Jifang Zhou Ning Zhou Xiaopeng Zhou Yong Zhou IMOE Key Laboratory for Particle Astrophysics and Cosmology Shanghai Key Laboratory for Particle Physics and Cosmology School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China Sichuan Research Institute Shanghai Jiao Tong UniversityChengdu 610213China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China School of Physics Sun Yat-sen UniversityGuangzhou 510275China Research Center for Particle Science and Technology Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao266237 ShandongChina Key Laboratory of Particle Physics and Particle Irradiation of Ministry of Education Shandong UniversityQingdao266237 ShandongChina Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China School of Physics Nankai UniversityTianjin 300071China Key Laboratory NuclearPyics and Ionampplication(MOE)Instituteof ModenPysics Fun Universty Shanghai 200433China School of Physics Peking UniversityBeijing 100871China Schol of Physics Beihang UniversityBejing 100191China International Research Center for Nuclei and Particles in the Cosmos Beijing key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai200093China Department of Physics University of MarylandCollge ParkMaryland 20742USA School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratoryof Particle Detetion and Electronics University of Scienceand Technology of ChinaHefei230026China Department of Modern Physics University of Science and Technology of ChinaHefei230026China SJTU ParisElite Instute of Technology Shanghai Jiao Tong UniversityShanghai 200240China

Precise measurement of two-neutrino double beta decay(DBD)half-life is an important step for the searches of Majorana neutrinos with neutrinoless double beta *** report the measurement of DBD half-life of 136xe using the Pandax-4T dual-phase Time Projection Chamber(TPC)with 3.7-tonne natural xenon and the first 94.9-day physics data release.

关键词： decay double Determination

Constraining self-interacting dark matter with the full dataset of PandaX-II

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Science China(Physics,Mechanics & Astronomy) 2021年第11期64卷 2-7页

作者： Jijun Yang Abdusalam abdukerim Wei Chen Xun Chen Yunhua Chen Chen Cheng Xiangyi Cui Yingjie Fan Deqing Fang Changbo Fu Mengting Fu lisheng Geng Karl Giboni linhui Gu Xuyuan Guo Ke Han Changda He Shengming He Di Huang Yan Huang Ran Huo Yanlin Huang Zhou Huang Xiangdong Ji Yonglin Ju Shuaijie li Qing lin Huaxuan liu Jianglai liu Xiaoying Lu Wenbo Ma Yugang Ma Yajun Mao Yue Meng Nasir Shaheed Kaixiang Ni Jinhua Ning Xuyang Ning Xiangxiang Ren Changsong Shang Guofang Shen lin Si Andi Tan Anqing Wang Hongwei Wang Meng Wang QiuHong Wang Siguang Wang Wei Wang Xiuli Wang Zhou Wang Mengmeng Wu Shiyong Wu Weihao Wu Jingkai Xia Mengjiao Xiao Xiang Xiao Pengwei xie Binbin Yan Yong Yang Chunxu Yu Hai-Bo Yu Jumin Yuan Ying Yuan Xinning Zeng Dan Zhang Tao Zhang li Zhao Qibin Zheng Jifang Zhou Ning Zhou Xiaopeng Zhou School of Physics and Astronomy Shanghai Jiao Tong UniversityMOE Key Laboratory for Particle Astrophysics and CosmologyShanghai Key Laboratory for Particle Physics and CosmologyShanghai 200240China Shanghai Jiao Tong University Sichuan Research Institude Chengdu 610213China Yalong River Hydropower Development Company Ltd.Chengdu 610051China School of Physics Sun Yat-sen UniversityGaungzhou 510275China Tsung-Dao Lee Institute Shanghai 200240China School of Physics Nankai UniversityTianjin 300071China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China School of Physics Peking UniversityBeijing 100871China School of Physics Beihang UniversityBeijing 100191China International Research Center for Nuclei and Particles in the Cosmos&Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China Shandong Institute of Advanced Technology Jinan 250103China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai 200093China Department of Physics University of MarylandCollege ParkMaryland 20742USA School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China Key Laboratory of Particle Physics and Particle Irradiation of Ministry of Education Shandong UniversityJinan 250100China Research Center for Particle Science and Technology Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China Department of Physics and Astronomy University of CaliforniaRiversideCalifornia 92507USA Center of High Energy Physics Peking UniversityBeijing 100871China

Self-interacting dark matter(SIDM)is a leading candidate proposed to solve discrepancies between predictions of the prevailing cold dark matter theory and observations of *** SIDM models predict the existence of a light force carrier that mediates strong dark matter *** the mediator couples to the standard model particles,it could produce characteristic signals in dark matter direct detection *** report searches for signals of SIDM models with a light mediator using the full dataset of the PandaX-II experiment,basing on a total exposure of 132 *** significant excess over background is found,and our likelihood analysis leads to a strong upper limit on the dark matter-nucleon coupling *** further combine the PandaX-II constraints and those from observations of the light element abundances in the early universe,and show that direct detection and cosmological probes can provide complementary constraints on dark matter models with a light mediator.

关键词： dark matter direct detection self-interacting dark matter

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Searching for neutrino-less nouble neta necay of 136Xe with PandaX-Ⅱ liquid xenon detector

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Chinese Physics C 2019年第11期43卷 1-10页

作者： Kaixiang Ni Yihui Lai Abdusalam abdukerim Wei Chen Xun Chen Yunhua Chen Xiangyi Cui Yingjie Fan Deqing Fang Changbo Fu lisheng Geng Karl Giboni Franco Giuliani linhui Gu Xuyuan Guo Ke Han Changda He Di Huang Yan Huang Yanlin Huang Zhou Huang Peng Ji Xiangdong Ji Yonglin Ju Kun liang Huaxuan liu Jianglai liu Wenbo Ma Yugang Ma Yajun Mao Yue Meng Parinya Namwongsa Jinhua Ning Xuyang Ning Xiangxiang Ren Changsong Shang lin Si Andi Tan Anqing Wang Hongwei Wang Meng Wang Qiuhong Wang Siguang Wang Xiuli Wang Zhou Wang Mengmeng Wu Shiyong Wu Jingkai Xia Mengjiao Xiao Pengwei xie Binbin Yan Jijun Yang Yong Yang Chunxu Yu Jumin Yuan Dan Zhang Hongguang Zhang Tao Zhang li Zhao Qibin Zheng Jifang Zhou Ning Zhou Xiaopeng Zhou INPAC and School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai Laboratory for Particle Physics and CosmologyShanghai 200240China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China School of Physics Nankai UniversityTianjin 300071China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China School of Physics&International Research Center for Nuclei and Particles in the Cosmos&Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai 200093China Tsung-Dao Lee Institute Shanghai 200240China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Physics Peking UniversityBeijing 100871China Department of Physics University of MarylandCollege ParkMaryland 20742USA School of Physics and Key Laboratory of Particle Physics and Particle Irradiation(MOE) Shandong UniversityJinan 250100China Center of High Energy Physics Peking UniversityBeijing 100871China

We report the Neutrino-less Double Beta Decay（NLDBD） search results from PandaX-Ⅱ dual-phase liquid xenon time projection *** total live time used in this analysis is 403.1 days from June 2016 to *** NLDBD-optimized event selection criteria,we obtain a fiducial mass of 219 kg of natural *** accumulated xenon exposure is 242 kg yr,or equivalently 22.2 kg yr of 136Xe *** the region around 136Xe decay Q-value of 2458 keV,the energy resolution of PandaX-Ⅱ is 4.2%.We find no evidence of NLDBD in PandaX-Ⅱand establish a lower limit for decay half-life of 2.1×1023yr at the 90% confidence level,which corresponds to an effective Majorana neutrino mass mββ <（1.4-3.7） *** is the first NLDBD result reported from a dual-phase xenon experiment.

关键词： neutrino-less double beta decay dark matter underground physics liquid xenon detector

Neutron-induced nuclear recoil background in the PandaX-4T experiment

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Chinese Physics C 2022年第11期46卷 262-274页

作者： Zhou Huang Guofang Shen Qiuhong Wang Abdusalam abdukerim zihao Bo Wei Chen Xun Chen Yunhua Chen Chen Cheng Yunshan 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 Ruquan Hou Xiangdong Ji Yonglin Ju Chenxiang li Mingchuan li Shu li Shuaijie li Qing lin Jianglai liu Xiaoying Lu lingyin Luo Wenbo Ma Yugang Ma Yajun Mao Yue Meng Xuyang Ning Ningchun Qi Zhicheng Qian Xiangxiang Ren Nasir Shaheed Changsong Shang lin Si Wenliang Sun Andi Tan Yi Tao Anqing Wang Meng Wang Shaobo Wang Siguang Wang Wei Wang Xiuli Wang Zhou Wang Mengmeng Wu Weihao Wu Jingkai Xia Mengjiao Xiao Xiang Xiao Pengwei xie Binbin Yan Xiyu Yan Jijun Yang Yong Yang Chunxu Yu Jumin Yuan Ying Yuan Dan Zhang Minzhen Zhang Peng Zhang Tao Zhang li Zhao Qibin Zheng Jifang Zhou Ning Zhou Xiaopeng Zhou Yong Zhou School of Physics and Astronomy Shanghai Jiao Tong UniversityKey Laboratory for Particle Astrophysics and Cosmology(MoE)Shanghai Key Laboratory for Particle Physics and CosmologyShanghai 200240China School of Physics Beihang UniversityBeijing 102206China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China Shanghai Jiao Tong University Sichuan Research Institute Chengdu 610213China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China School of Physics Sun Yat-Sen UniversityGuangzhou 510275China Research Center for Particle Science and Technology Institute of Frontier and Interdisciplinary SciencShandong UniversityQingdao 266237China Key Laboratory of Particle Physics and Particle Irradiation of Ministry of Education Shandong UniversityQingdao 266237China Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghai200240China School of Physics Nankai UniversityTianjin 300071China School of Physics Peking UniversityBeijing 100871China Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing102206China School of Physics and Microelectronics Zhengzhou UniversityZhengzhouHenan 450001China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai 200093China Department of Physics University of MarylandCollege ParkMaryland 20742USA School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China SJTU Paris Elite Institute of Technology Shanghai Jiao Tong UniversityShanghai200240China

Neutron-induced nuclear recoil background is critical to dark matter searches in the PandaX-4T liquid xenon *** this study,we investigate the features of neutron background in liquid xenon and evaluate its contribution in single scattering nuclear recoil events using three *** first method is fully based on Monte Carlo *** last two are data-driven methods that also use multiple scattering signals and high energy signals in the *** the PandaX-4T commissioning data with an exposure of 0.63 tonne-year,all these methods give a consistent result,i.e.,there are 1.15±0.57 neutron-induced backgrounds in the dark matter signal region within an approximated nuclear recoil energy window between 5 and 100 keV.

关键词： dark matter neutron background multiple scattering high energy gamma

A Search for Solar Axions and Anomalous Neutrino Magnetic Moment with the Complete Panda X-Ⅱ Data

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Chinese Physics Letters 2021年第1期38卷 30-34页

作者： Xiaopeng Zhou Xinning Zeng Xuyang Ning Abdusalam abdukerim Wei Chen Xun Chen Yunhua Chen Chen Cheng Xiangyi Cui Yingjie Fan Deqing Fang Changbo Fu Mengting Fu lisheng Geng Karl Giboni linhui Gu Xuyuan Guo Ke Han Changda He Di Huang Yan Huang Yanlin Huang Zhou Huang Xiangdong Ji Yonglin Ju Shuaijie li Huaxuan liu Jianglai liu Xiaoying Lu Wenbo Ma Yugang Ma Yajun Mao Yue Meng Kaixiang Ni Jinhua Ning Xiangxiang Ren Changsong Shang Guofang Shen lin Si Andi Tan Anqing Wang Hongwei Wang Meng Wang Qiuhong Wang Siguang Wang Wei Wang Xiuli Wang Zhou Wang Mengmeng Wu Shiyong Wu Weihao Wu Jingkai Xia Mengjiao Xiao Pengwei xie Binbin Yan Jijun Yang Yong Yang Chunxu Yu Jumin Yuan Ying Yuan Dan Zhang Tao Zhang li Zhao Qibin Zheng Jifang Zhou Ning Zhou INPAC School of Physics and AstronomyShanghai Jiao Tong Universityand Shanghai Key Laboratory for Particle Physics and CosmologyShanghai 200240China School of Physics Beihang UniversityBeijing 100191China Shanghai Jiao Tong University Sichuan Research Institute Chengdu 610213China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China School of Physics Sun Yat-Sen UniversityGuangzhou 510275China Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China School of Physics Nankai UniversityTianjin 300071China Key Laboratory of Nuclear Physics and Ion-Beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China School of Physics Peking UniversityBeijing 100871China International Research Center for Nuclei and Particles in the Cosmos&Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai 200093China Department of Physics University of MarylandCollege ParkMaryland 20742USA School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Physics and Key Laboratory of Particle Physics and Particle Irradiation(MOE) Shandong UniversityJinan 250100China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China Center for High Energy Physics Peking UniversityBeijing 100871China

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 XENON1 *** data correspond to a total exposure of 100.7 ton·day with liquid *** robust estimates of the dominant background spectra,we perform sensitive searches on solar axions and neutrinos with enhanced magnetic *** is found that the axionelectron coupling gAe<4.6×10^(-12) for an axion mass less than 0.1 keV/c^(2) and the neutrino magnetic moment μv<4.9×10^(-11)μB at 90%confidence *** observed excess from XENON1 T is within our experimental constraints.

关键词： moment. excess estimates