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Splenic vasculopathy in portal hypertension patients

World Journal of Gastroenterology 2006年第17期12卷 2737-2741页

作者： tao li ji-yuan ni yan-wu qi hai-yang li tong zhang zhen yang Department of Hepatic Surgery Tongji Hosptal Tongji medical College Huazhong University of Science and Technology Wuhan 430030 Hubei province China

AIM： To investigate the interaction between portal hypertension, splanchnic hyperdynamic circulation and splanchnic vasculopathy by observing splenic arterial and venous pathological changes and the role of extracellular matrix in the pathogenesis of portal hypertensive vasculopathy by measuring the expression of type Ⅰ and type Ⅲ procollagen mRNA in splenic venous walls of portal hypertensive patients. METHODS： Morphological changes of splenic arteries and veins taken from portal hypertensive patients （n = 20） and normal controls （n = 10） were observed under optical and electron microscope. Total RNA was extracted and the expression of type Ⅰ and type Ⅲ procollagen mRNA in splenic venous walls of portal hypertensive patients （n= 20） was semi-quantitatively detected using reverse transcription-polymerase chain reaction （RT-PCR）. RESULTS： Under optical microscope, splenic arterial intima was destroyed and internal elastic membrane and medial elastic fibers of the splenic arterial walls were degenerated and broken. Splenic venous intima became remarkably thick. Endothelial cells were not intact with formation of mural thrombus. The tunica media became thickened significantly due to hypertrophy of smooth muscles. Fibers and connective tissues were increased obviously. Under electron microscope, smooth muscle cells of the splenic arteries were degenerated and necrotized. Phenotypes of smooth muscle cells changed from constrictive into synthetic type. Red blood cells and platelets accumulated around the damaged endothelial cells. Synthetic smooth muscle cells were predominant in splenic veins and their cytoplasma had plentiful rough endoplasmic reticulum ribosomes and Golgi bodies. Along the vascular wall, a lot of collagen fibers were deposited, the intima was damaged and blood components accumulated. There was no significant difference in the expression of type Ⅰ procollagen mRNA in splenic venous wall between the patients with portal hypertension and those without

关键词： Portal hypertension Splanchnic hyperdynamic circulation Splanchnic vasculopathy

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The Chromosome-Based Rubber Tree Genome Provides New Insights into Spurge Genome Evolution and Rubber Biosynthesis

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Molecular Plant 2020年第2期13卷 336-350页

作者： jin liu Cong Shi Cheng-Cheng Shi Wei li Qun-jie zhang Yun zhang Kui li Hui-Fang Lu Chao Shi Si-tao Zhu Zai-Yun Xiao Hong Nan Yao Yue Xun-Ge Zhu Yu wu Xiao-ning Hong Guang-Yi Fan yan tong Dan zhang Chang-li Mao Yun-Long liu Shi-jie Hao Wei-qing liu Mei-qi Lv hai-Bin zhang yuan liu Ge-Ran Hu-tang jin-Peng Wang jia-Hao Wang Ying-Huai Sun Shu-Bang ni Wen-Bin Chen Xing-Cai zhang yuan-nian jiao Evan E.Eichler Guo-Hua li Xin liu li-Zhi Gao Yunnan Institute of Tropical Crops Jinghong 666100China Plant Germplasm and Genomics Center Germplasm Bank of Wild Species in Southwestern ChinaKunming Institute of BotanyChinese Academy of SciencesKunming 650204China University of Chinese Academy of Sciences Beijing 100049China BGI-qingdao Qingdao 266555China lnstitution of Genomics and Bioinformatics South China Agricultural UniversityGuangzhou 510642China Asia-Pacific Tropical Forestry Germplasm Institution Southwest China Forestry UniversityKunming 650224China School of life Sciences Nanjing UniversityNanjing 210023China Novogene Bioinformatics Institute Beijing 100083China BGI-Shenzhen Shenzhen 518083China State Key Laboratory of Systematic and Evolutionary Botany Institute of BotanyChinese Academy of SciencesBeijing 100093China John A.Paulson School of Engineering and Applied Sciences Harvard UniversityCambridgeMA 02138USA Howard Hughes Medical Institute University of WashingtonSeattleWA 98195USA

The rubber tree,Hevea brasiliensis,produces natural rubber that serves as an essential industrial raw ***,we present a high-quality reference genome for a rubber tree cultivar GT1 using single-molecule real-time sequencing(SMRT)and Hi-C technologies to anchor the～1.47-Gb genome assembly into 18 *** chromosome-based genome analysis enabled us to establish a model of spurge chromosome evolution,since the common paleopolyploid event occurred before the split of Hevea and *** show recent and rapid bursts of the three Hevea-specific LTR-retrotransposon families during the last 10 million years,leading to the massive expansion by～65.88%(～970 Mbp)of the whole rubber tree genome since the divergence from *** identify large-scale expansion of genes associated with whole rubber biosynthesis processes,such as basal metabolic processes,ethylene biosynthesis,and the activation of polysaccharide and glycoprotein lectin,which are important properties for latex production.A map of genomic variation between the cultivated and wild rubber trees was obtained,which contains～15.7 million high-quality single-nucleotide *** identified hundreds of candidate domestication genes with drastically lowered genomic diversity in the cultivated but not wild rubber trees despite a relatively short domestication history of rubber tree,some of which are involved in rubber *** genome assembly represents key resources for future rubber tree research and breeding,providing novel targets for improving plant biotic and abiotic tolerance and rubber production.

关键词： rubber tree rubber biosynthesis chromosome evolution whole-genome duplication domestication

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The first data release(DR1) of the LAMOST regular survey

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Research in Astronomy and Astrophysics 2015年第8期15卷 1095-1124页

作者： A-li Luo Yong-Heng Zhao Gang Zhao li-Cai Deng Xiao-Wei liu Yi-Peng jing Gang Wang Hao-tong zhang jian-Rong Shi Xiang-Qun Cui Yao-Quan Chu Guo-Ping li Zhong-Rui Bai Yue wu yan Cai Shu-Yun Cao Zi-Huang Cao Jeffrey L.Carlin hai-yuan Chen jian-Jun Chen Kun-Xin Chen li Chen Xue-Lei Chen Xiao-yan Chen Ying Chen Norbert Christlieb jia-Ru Chu Chen-Zhou Cui Yi-qiao Dong Bing Du Dong-Wei Fan Lei Feng jian-ning Fu Peng Gao Xue-Fei Gong Bo-Zhong Gu yan-Xin Guo Zhan-Wen Han Bo-liang He jin-liang Hou Yong-Hui Hou Wen Hou Hong-Zhuan Hu ning-Sheng Hu Zhong-Wen Hu Zhi-Ying Huo Lei jia Fang-Hua jiang Xiang jiang Zhi-Bo jiang Ge jin Xiao Kong Xu Kong Ya-Juan Lei Ai-Hua li Chang-Hua li Guang-Wei li hai-ning li jian li qi li Shuang li Sha-Sha li Xin-Nan li yan li Yin-Bi li Ye-Ping li yuan liang Chien-Cheng lin Chao liu Gen-Rong liu Guan-Qun liu Zhi-Gang liu Wen-Zhi Lu Yu Luo Yin-Dun Mao Heidi Newberg ji-Jun ni Zhao-Xiang qi Yong-Jun qi Shi-Yin Shen Huo-Ming Shi jing Song Yi-Han Song Ding-qiang Su Hong-Jun Su zheng-Hong Tang qing-Sheng tao yuan Tian Dan Wang Da-qi Wang Feng-Fei Wang Guo-Min Wang hai Wang Hong-Chi Wang jian Wang jia-ning Wang jian-ling Wang jian-Ping Wang Jun-Xian Wang Lei Wang Meng-Xin Wang Shou-Guan Wang Shu-qing Wang Xia Wang Ya-Nan Wang You Wang Yue-Fei Wang You-Fen Wang Peng Wei Ming-Zhi Wei Hong wu Ke-Fei wu Xue-Bing wu Yu-Zhong wu Xiao-zheng Xing ling-Zhe Xu Xin-qi Xu yan Xu Tai-Sheng yan De-Hua yang hai-Feng yang Hui-qin yang Ming yang zheng-qiu Yao Yong Yu Hui yuan hai-Bo yuan hai-Long yuan Wei-Min yuan Chao Zhai En-Peng zhang Hua-Wei zhang jian-Nan zhang li-Pin zhang Wei zhang Yong zhang yan-Xia zhang zheng-Chao zhang Ming Zhao Fang Zhou Xu Zhou jie Zhu Yong-Tian Zhu Si-Cheng Zou Fang Zuo National Astronomical Observatories Chinese Academy of Sciences Department of Astronomy Peking University Shanghai Astronomical Observatory Chinese Academy of Sciences Nanjing Institute of Astronomical Optics & Technology National Astronomical ObservatoriesChinese Academy of Sciences University of Science and Technology of China Department of Physics Applied Physics and AstronomyRensselaer Polytechnic InstituteTroyNY 12180USA Department of Physics and Astronomy Earlham CollegeRichmondIN 47374USA Universitt Heidelberg Zentrum für AstronomieLandessternwarteKnigstuhl 1269117 HeidelbergGermany Department of Astronomy Beijing Normal University Yunnan Observatories Chinese Academy of Sciences Purple Mountain Observatory Chinese Academy of Sciences

The Large sky Area Multi-Object Fiber Spectroscopic Telescope（LAMOST） general survey is a spectroscopic survey that will eventually cover approximately half of the celestial sphere and collect 10 million spectra of stars, galaxies and QSOs. Objects in both the pilot survey and the first year regular survey are included in the LAMOST DR1. The pilot survey started in October 2011 and ended in June 2012, and the data have been released to the public as the LAMOST Pilot Data Release in August 2012. The regular survey started in September 2012, and completed its first year of operation in June 2013. The LAMOST DR1 includes a total of 1202 plates containing 2 955 336 spectra, of which 1 790 879 spectra have observed signalto-noise ratio（SNR） ≥ 10. All data with SNR ≥ 2 are formally released as LAMOST DR1 under the LAMOST data policy. This data release contains a total of 2 204 696 spectra, of which 1 944 329 are stellar spectra, 12 082 are galaxy spectra and 5017 are quasars. The DR1 not only includes spectra, but also three stellar catalogs with measured parameters： late A,FGK-type stars with high quality spectra（1 061 918 entries）, A-type stars（100 073 entries）, and M-type stars（121 522 entries）. This paper introduces the survey design, the observational and instrumental limitations, data reduction and analysis, and some caveats. A description of the FITS structure of spectral files and parameter catalogs is also provided.

关键词： techniques: spectroscopic survey—data release—catalog

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Timing analysis of the black hole candidate EXO 1846–031 with Insight-HXMT monitoring

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Research in Astronomy and Astrophysics 2021年第3期21卷 193-204页

作者： He-Xin liu Yue Huang Guang-Cheng Xiao qing-Cui Bu jin-Lu Qu Shu zhang Shuang-Nan zhang Shu-Mei jia Fang-Jun Lu Xiang Ma lian tao Wei zhang li Chen li-Ming Song Ti-Pei li Yu-Peng Xu Xue-Lei Cao Yong Chen Cong-Zhan liu Ce Cai Zhi Chang Gang Chen Tian-Xiang Chen Yi-Bao Chen Yu-Peng Chen Wei Cui Wei-Wei Cui jing-Kang Deng Yong-Wei Dong yuan-yuan Du Min-Xue Fu Guan-Hua Gao He Gao Min Gao Ming-Yu Ge Yu-Dong Gu Ju Guan Cheng-Cheng Guo Da-Wei Han jia Huo Lu-Hua jiang Wei-Chun jiang jing jin Yong-jie jin ling-Da Kong Bing li Cheng-Kui li Gang li Mao-Shun li Wei li Xian li Xiao-Bo li Xu-Fang li yang-Guo li zheng-Wei li Xiao-Hua liang jing-yuan liao Bai-Sheng liu Guo-qing liu Hong-Wei liu Xiao-jing liu Yi-Nong liu Bo Lu Xue-Feng Lu qi Luo tao Luo Bin Meng Yi Nang jian-Yin nie Ge Ou Na Sai Ren-Cheng Shang Xin-Ying Song liang Sun Ying Tan You-li Tuo Chen Wang Guo-Feng Wang Juan Wang ling-Jun Wang Weng-Shuai Wang Yu-Sa Wang Xiang-yang Wen Bai-yang wu Bo-Bing wu Mei wu Shuo Xiao Shao-lin Xiong He Xu jia-Wei yang Sheng yang yan-ji yang Yi-Jung yang qi-Bin Yi qian-qing Yin yuan You Ai-Mei zhang Cheng-Mo zhang Fan zhang Hong-Mei zhang Juan zhang tong zhang Wan-Chang zhang Wen-Zhao zhang Yi zhang Yi-Fei zhang Yong-jie zhang yuan-Hang zhang Yue zhang Zhao zhang Zhi zhang Zi-liang zhang hai-Sheng Zhao Xiao-Fan Zhao Shi-jie zheng Yao-Guang zheng Deng-Ke Zhou jian-Feng Zhou Yu-Xuan Zhu Ren-lin Zhuang Yue Zhu Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100049China Institut fur Astronomie und Astrophysik Kepler Center for Astro and Particle PhysicsEberhard Karls Universität72076 TubingenGermany Department of Astronomy Beijing Normal UniversityBeijing 100088China Department of Astronomy Tsinghua UniversityBeijing 100084China Department of Physics Tsinghua UniversityBeijing 100084China Department of Engineering Physics Tsinghua UniversityBeijing 100084China Key Laboratory of Space Astronomy and Technology National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China College of Physics Sciences&Technology Hebei UniversityBaoding 071002Hebei ProvinceChina

We present the observational results from a detailed timing analysis of the black hole candidate EXO 1846-031 during its outburst in 2019 with the observations of Insight-HXMT,niCER and *** outburst can be classified roughly into four different ***-C quasi-periodic oscillations(QPOs)observed by niCER(about 0.1-6 Hz)and Insight-HXMT(about 0.7-8 Hz)are also reported in this ***,we study various physical quantities related to QPO *** QPO rms-frequency relationship in the energy band 1-10 keV indicates that there is a turning pointing in frequency around2 Hz,which is similar to that of GRS 1915+105.A possible hypothesis for the relationship above may be related to the inclination of the source,which may require a high inclination to explain *** relationships between QPO frequency and QPO rms,hardness,total fractional rms and count rate have also been found in other transient sources,which can indicate that the origin of type-C QPOs is non-thermal.

关键词： X-ray binaries black hole candidate QPO EXO 1846–031

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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

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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

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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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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

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Measurement of solar pp neutrino flux using electron recoil data from PandaX-4T commissioning run

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Chinese Physics C 2024年第9期48卷 1-7,300页

作者： 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 Research Center for Particle Science and Technology Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China Key Laboratory of Particle Physics and Particle Irradiation of Ministry of Education Shandong UniversityQingdao 266237China 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 New Cornerstone Science Laboratory Tsung-Dao Lee InstituteShanghai Jiao Tong UniversityShanghai 200240China Shanghai jiao tong University Sichuan Research Institute Chengdu 610213China jinping Deep Underground Frontier Science and Dark Matter Key Laboratory of Sichuan Province Liangshan 615000China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China School of Physics Sun Yat-Sen UniversityGuangzhou 510275China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China Department of Physics Yantai UniversityYantai 264005China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China School of Physics Beihang UniversityBeijing 102206China Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 102206China Peng Huanwu Collaborative Center for Research and Education Beihang UniversityBeijing 100191China Southern Center for Nuclear-Science Theory(SCNT) Institute of Modern PhysicsChinese Academy of SciencesHuizhou 516000China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China Department of Physics University of MarylandCollege ParkMaryland 20742USA 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 School of Physics Peking UniversityBeijing 100871Ch

The proton-proton(pp)fusion chain dominates the neutrino production in 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 study,for the first time,we measure 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 *** pp neutrino flux is determined as(8.0±3.9(stat)±10.0(syst))×1010 s^(-1)cm^(-2),which is consistent with the Standard Solar Model and existing measurements,corresponding to an upper flux limit of 23.3×10^(10)s^(-1)cm^(-2)at 90%C.L..

关键词： solar pp neutrino flux PandaX-4T electron recoil spectrum

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

引用

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

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