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search for electron-antineutrinos associated with gravitational-wave events gW150914,gW151012,gW151226,gW170104,gW170608,gW170814,and gW170817 at Daya bay

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chinese Physics c 2021年第5期45卷 190-201页

作者： f.P.An A.b.balantekin h.R.band M.bishai s.blyth g.f.cao j.cao j.f.chang Y.chang h.s.chen s.M.chen Y.chen Y.X.chen j.cheng Z.k.cheng j.j.cherwinka M.c.chu j.P.cummings O.Dalager f.s.Deng Y.Y.Ding M.V.Diwan T.Dohnal j.Dove M.Dvorak D.A.Dwyer j.P.gallo M.gonchar g.h.gong h.gong W.Q.gu j.Y.guo l.guo X.h.guo Y.h.guo Z.guo R.W.hackenburg s.hans M.he k.M.heeger Y.k.heng A.higuera Y.k.hor Y.b.hsiung b.Z.hu j.R.hu T.hu Z.j.hu h.X.huang X.T.huang Y.b.huang P.h.b.r D.E.jaffe k.l.jen X.l.ji X.P.ji R.A.johnson D.jones l.kang s.h.kettell s.k.hn M.kramer T.j.l.ngford j.l.e j.h.c.lee R.T.lei R.leitner j.k.c.leung f.li j.j.l. Q.j.l. s.li s.c.li W.D.li X.N.li X.Q.li Y.f.li Z.b.li h.liang c.j.l.n g.l.lin s.lin j.j.l.ng j.M.link l.littenberg b.R.littlejohn j.c.liu j.l.liu c.lu h.Q.lu j.s.lu k.b.luk X.b.Ma X.Y.Ma Y.Q.Ma c.Marshall D.A.Martinez caicedo k.T.MeDonald R.D.Mckeown Y.Meng j.Napolitano D.Naumov E.Naumova j.P.Ochoa-Ricoux A.OIshevskiy h.-R.Pan j.Park s.Patton j.c.Peng c.s.j.Pun f.Z.Qi M.Qi X.Qian N.Raper j.Ren c.Morales Reveco R.Rosero b.Roskovec X.c.Ruan h.steiner j.l.sun T.Tmej k.Treskov W.-h.Tse c.E.Tull b.Viren V.Vorobel c.h.Wang j.Wang M.Wang N.Y.Wang R.g.Wang W.Wang W.Wang X.Wang Y.Wang Y.f.Wang Z.Wang Z.Wang Z.M.Wang h.Y.Wei l.h.Wei l.j.Wen k.Whisnant c.g.White h.l.h.Wong E.Worcester D.R.Wu f.l.Wu Q.Wu W.j.Wu D.M.Xia Z.Q.Xie Z.Z.Xing j.l.xu T.xu T.xue c.g.Yang l.Yang Y.Z.Yang h.f.Yao M.Ye M.Yeh.b.l.Young h.Z.Yu Z.Y.Yu b.b.Yue s.Zeng Y.Zeng l.Zhan c.Zhang f.Y.Zhang h.h.Zhang j.W.Zhang Q.M.Zhang X.T.Zhang Y.M.Zhang Y.X.Zhang Y.Y.Zhang Z.j.Zhang Z.P.Zhang Z.Y.Zhang j.Zhao l.zhou h.l.Zhuang j.h.Zou Instiute of Modern Physics East China University of Science and TechnologyShanghai 200237 university of Wisconsin MadisonWisconsin 53706 Wright laboratory and department of Physics Yale UniversityNew HavenConnecticut 06520 brookhaven National laboratory UptonNew York 11973 department of Physics National Taiwan UniversityTaipei Institute of high Energy Physics Beijing 100049 National United university Miao-Li department of engineering Physics Tsinghua UniversityBejing 100084 shenzhen university Shenzhen 518060 sun Yat-sen(Zhongshan)university Guangzhou North china Electric Power university Bejjing 102206 chinese university of hong kong Hong Kong 999077 siena college LoudonvilleNew York 12211 department of Physics and Astronomy University of CaliforniaIrvineCaliformia 92697 university of science and Technology of china Hefei 230026 charles university Faculty of Mathematics and PhysicsPrague department of Physics University of llinois at Urbana-ChampaignUrbanaIlinois 61801 lawrence berkeley National laboratory BerkeleyCalifornia 94720 department of Physics Illinois Institute of TechnologyChicagoIllinois 60616 joint Institute for Nuclear Research DubnaMoscow Region beijing Normal university Beijing 100875 department of Nuclear science and Technology School of Energy and Power EngineeringXi'an Jiaotong UniversityXi'an 710049 department of Physics University of HoustonHoustonTexas 77204 china Institute of Atomic Energy Beijing 102413 shandong university Jinan 250100 guangxi university Nanning 530004 center for Neutrino Physics Virginia TechBlacksburgVirginia 24061 Institute of Physics National Chiao-Tung UniversityHsinchu department of Physics University of CincinnatiCincinnatiOhio 45221 department of Physies Collge of Science and TechnologyTemple UniversityPhiladelphiaPennsylvania 19122 Dongguan university of Technology Dongguan 523808 department of Physics University of CaliforniaBerkeleyCalifornia 94720 department of Physics The University of Hong KongPokfulamHong Kong 999077 school

The establishment of a possible connection between neutrino emission and gravitational-wave(gW)bursts is important to our understanding of the physical processes that occur when black holes or neutron stars *** the Daya bay experiment,using the data collected from December 2011 to August 2017,a search was per-formed for electron-antineutrino signals that coincided with detected gW events,including gW150914,gW151012,gW151226,gW170104,gW170608,gW 170814,and gW *** used three time windows of±10,±500,and±1000 s relative to the occurrence of the gW events and a neutrino energy range of 1.8 to 100 MeV to search for correlated neutrino *** detected electron-antineutrino candidates were consistent with the expected bac.g.ound rates for all the three time *** monochromatic spectra,we found upper limits(90%confidence level)of the electron-antineutrino fluence of(1.13-2.44)×10^(11)cm^(-2)at 5 MeV to 8.0×10^(7)cm^(-2)at 100 MeV for the three time w *** the assumption of a fermi-Dirac spectrum,the upper limits were found to be(5.4-7.0)×10^(9)cm^(2)for the three time windows.

关键词： grav itational waves electron-antineutrinos fluence upper limit

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Reconstruction of cherenkov image bymultiple telescopes of lhAAsO-WfcTA

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Radiation Detection Technology and Methods 2022年第4期6卷 544-557页

作者： f.Aharonian Q.An Axikegu l.X.bai Y.X.bai Y.W.bao D.bastieri X.j.bi Y.j.bi j.T.cai Zhe cao Zhen cao j.chang j.f.chang E.s.chen liang chen liang chen long chen M.j.chen M.l.chen Q.h.chen s.h.chen s.Z.chen T.l.chen Y.chen h.l.cheng N.cheng Y.D.cheng s.W.cui X.h.cui Y.D.cui b.D’Ettorre Piazzoli b.Z.Dai h.l.Dai Z.g.Dai Danzengluobu Ddella Volpe k.k.Duan j.h.fan Y.Z.fan Z.X.fan j.fang k.fang c.f.feng l.feng s.h.feng X.T.feng Y.l.feng b.gao c.D.gao l.Q.gao Q.gao W.gao W.k.gao M.M.ge l.s.geng g.h.gong Q.b.gou M.h.gu f.l.guo j.g.guo X.l.guo Y.Q.guo Y.Y.guo Y.A.han h.h.he h.N.he s.l.he X.b.he Y.he M.heller Y.k.hor c.hou X.hou h.b.hu Q.hu s.hu s.c.hu X.j.hu D.h.huang W.h.huang X.T.huang X.Y.huang Y.huang Z.c.huang X.l.ji h.Y.jia k.jia k.jiang Z.j.jiang M.jin M.M.kang T.ke D.kuleshov k.levochkin b.b.li cheng li cong li f.li h.b.li h.c.li h.Y.li j.l. jian li jie li k.li Wlli XRli Xin li Xin li YZli Zhe li Zhuo li E.W.liang Y.f.liang s.j.l.n b.liu c.liu D.liu h.liu h.D.liu j.l.u j.l.liu j.s.liu j.Y.liu M.Y.liu R.Y.liu s.M.liu W.liu Y.liu Y.N.liu W.j.l.ng R.lu Q.luo h.k.lv b.Q.Ma l.l.Ma X.h.Ma j.R.Mao A.Masood Z.Min W.Mitthumsiri Y.c.Nan Z.W.Ou b.Y.Pang P.Pattarakijwanich Z.Y.Pei M.Y.Qi Y.Q.Qi b.Q.Qiao j.j.Qin D.Ruffolo A.sáiz c.Y.shao l.shao O.shchegolev X.D.sheng j.Y.shi h.c.song Yu.V.stenkin V.stepanov Y.su Q.N.sun X.N.sun Z.b.sun P.h.T.Tam Z.b.Tang W.W.Tian b.D.Wang c.Wang h.Wang h.g.Wang j.c.Wang j.s.Wang l.P.Wang l.Y.Wang R.Wang R.N.Wang W.Wang X.g.Wang X.Y.Wang Y.Wang Y.D.Wang Y.j.Wang Y.P.Wang Z.h.Wang Z.X.Wang Zhen Wang Zheng Wang D.M.Wei j.j.Wei Y.j.Wei T.Wen c.Y.Wu h.R.Wu s.Wu X.f.Wu Y.s.Wu s.Q.Xi j.Xia j.j.Xia g.M.Xiang D.X.Xiao g.Xiao g.g.Xin Y.l.Xin Y.Xing Z.Xiong D.l.xu R.X.xu l.xue D.h.Yan j.Z.Yan c.W.Yang f.f.Yang h.W.Yang j.Y.Yang l.l.Yang M.j.Yang R.Z.Yang s.b.Yang Y.h.Yao Z.g.Yao Y.M.Ye l.Q.Yin N.Yin X.h.You Z.Y.You Y.h.Yu Q.Yuan h.Yue h.D.Zeng T.X.Zeng W.Zeng Z.k.Zeng M.Zha X.X.Zhai b.b.Zhang f.Zhang h.M.Zhang h.Y.Zhang j.l.Zhang l.X.Zhang li Zhang lu Zhang P.f.Zhang P.P.Zhang R.Zhang s.b.Zhang s.R.Zhang s. key laboratory of Particle Astrophyics&Experimental Physics Division&computing center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China university of chinese Academy of sciences Beijing 100049China TIANfU cosmic Ray Research center ChengduSichuanChina Dublin Institute for Advanced studies 31 Fitzwilliam Place2DublinIreland Max-Planck-Institut for Nuclear Physics P.O.Box 10398069029 HeidelbergGermany state key laboratory of Particle Detection and Electronics BeijingChina university of science and Technology of china Hefei 230026AnhuiChina school of Physical science and Technology&school of Information science and Technology Southwest Jiaotong UniversityChengdu 610031SichuanChina college of Physics Sichuan UniversityChengdu 610065SichuanChina school of Astronomy and space science Nanjing UniversityNanjing 210023JiangsuChina center for Astrophysics Guangzhou UniversityGuangzhou 510006GuangdongChina key laboratory of Dark Matter and space Astronomy&key laboratory of Radio Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023JiangsuChina key laboratory for Research in galaxies and cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China key laboratory of cosmic Rays(Tibet university) Ministry of EducationLhasa 850000TibetChina National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China h.b.i Normal university Shijiazhuang 050024HebeiChina school of Physics and Astronomy(Zhuhai)&sino-french Institute of Nuclear engineering and Technology(Zhuhai) Sun Yat-sen UniversityZhuhai 519000China school of Physics(guangzhou) Sun Yat-sen UniversityGuangzhou 510275GuangdongChina Dipartimento di f.s.ca dell’Universitàdi Napoli“federico II” Complesso Universitario di Monte Sant’Angelovia Cinthia80126 NapoliItaly school of Physics and Astronomy Yunnan UniversityKunming 650091YunnanChina Département de Physique Nucléaire et corpusculaire Facultéde SciencesUniversitéde Genève

Introduction One of main scientiﬁc.g.als of the large high Altitude Air shower Observatory(lhAAsO)is to accurately measure the energy spectra of different cosmic ray compositions around the‘knee’*** Wide field-of-View(foV)cherenkov Telescope Array(WfcTA),which is one of the main detectors of lhAAsO and has 18 telescopes,is built to achieve this *** telescopes are put together and point to connected directions for a larger *** Telescopes are deployed spatially as close as possible,but due to their own size,the distance between two adjacent telescopes is about 10 ***,the cherenkov lateral distribution and the parallax between the two telescopes should be considered in the event building process for images crossing over the boundaries of foVs of the *** event building method for cherenkov images measured by multiple telescopes of WfcTA is *** performance of the shower measurements using the combined images is evaluated by comparing with showers that are fully contained by a virtual telescope in *** and conclusion It is proved that the developed event building process can help to increase the foV of WfcTA by 30%while maintaining the same reconstruction quality,compared to the separate telescope reconstruction method.

关键词： method directions conclusion

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line-of.s.ower trigger method to lower energy threshold for gRb detection using lhAAsO-WcDA

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Radiation Detection Technology and Methods 2021年第4期5卷 531-541页

作者： f.Aharonian Q.An Axikegu l.X.bai Y.X.bai Y.W.bao D.bastieri X.j.bi Y.j.bi h.cai j.T.cai Z.cao Z.cao j.chang j.f.chang X.c.chan b.M.chen j.chen l.chen l.chen l.chen M.j.chen M.l.chen Q.h.chen s.h.chen s.Z.chen T.l.chen X.l.chen Y.chen N.chen Y.D.chen s.W.cui X.h.cui Y.D.cui b.Z.Dai h.l.Dai Z.g.Dai Danzengluobu D.della Volpe b.D’Ettorre Piazzoli X.j.Don j.h.fan Y.Z.fan Z.X.fan j.fang k.fan c.f.feng l.feng s.h.fen Y.l.feng b.gao c.D.gao Q.gao W.gao M.M.ge l.s.gen g.h.gong Q.b.gou M.h.gu j.g.guo X.l.guo Y.Q.guo Y.Y.guo Y.A.han h.h.he h.N.he j.c.he s.l.he X.b.he Y.he M.heller Y.k.hor c.hou X.hou h.b.hu s.hu s.c.hu X.j.hu D.h.huang Q.l.huan W.h.huang X.T.huang Z.c.huang f.ji X.l.ji h.Y.jia k.jiang Z.j.jiang c.jin D.kuleshov k.levochkin b.b.li c.li c.li f.li h.b.li h.c.li h.Y.li j.l. k.li W.l.li X.li X.li X.R.li Y.li Y.Z.li Z.li Z.li E.W.liang Y.f.liang s.j.l.n b.liu c.liu D.liu h.liu h.D.liu j.l.u j.l.liu j.s.liu j.Y.liu M.Y.liu R.Y.liu s.M.liu W.liu Y.N.liu Z.X.liu W.j.l.ng R.lu h.k.lv b.Q.Ma l.l.Ma X.h.Ma j.R.Mao A.Masood W.Mitthumsiri T.Montaruli Y.c.Nan b.Y.Pang P.Pattarakijwanich Z.Y.Pei M.Y.Qi D.Ruffolo V.Rulev A.sáiz l.shao O.shchegolev X.D.shen j.R.shi h.c.song Yu.V.stenkin V.stepanov Q.N.sun X.N.sun Z.b.sun P.h.T.Tam Z.b.Tang W.W.Tian b.D.Wan c.Wang h.Wang h.g.Wang j.c.Wang j.s.Wang l.P.Wang l.Y.Wan R.N.Wang W.Wang W.Wang X.g.Wang X.j.Wan X.Y.Wang Y.D.Wan Y.j.Wan Y.P.Wang Z.Wang Z.Wang Z.h.Wang Z.X.Wang D.M.Wei j.j.Wei Y.j.Wei T.Wen c.Y.Wu h.R.Wu s.Wu W.X.Wu X.f.Wu s.Q.Xi j.Xia j.j.Xia g.M.Xiang g.Xiao h.b.Xiao g.g.Xin Y.l.Xin Y.Xing D.l.xu R.X.xu l.xue D.h.Yan c.W.Yang f.f.Yang j.Y.Yang l.l.Yang M.j.Yan R.Z.Yang s.b.Yang Y.h.Yao Z.g.Yao Y.M.Ye l.Q.Yin N.Yin X.h.You Z.Y.You Y.h.Yu Q.Yuan h.D.Zeng T.X.Zeng W.Zeng Z.k.Zeng M.Zha X.X.Zhai b.b.Zhang h.M.Zhang h.Y.Zhang j.l.Zhang j.W.Zhang l.Zhang l.Zhang l.X.Zhang P.f.Zhang P.P.Zhang R.Zhang s.R.Zhang s.s.Zhan X.Zhang X.P.Zhan Y.Zhan Y.Zhang Y.f.Zhang Y.l.Zhan b.Zhao j.Zhao l.Zhao l.Z.Zhao s.P.Zhao f.Zheng Y.Zheng b.zhou h.zhou j.N.zhou P.zhou R.zhou X.X.zhou c.g. key laboratory of Particle Astrophysics&Experimental Physics Division&computing center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China university of chinese Academy of sciences Beijing 100049China TIANfU cosmic Ray Research center ChengduSichuanChina state key laboratory of Particle Detection and Electronics BeijingChina university of science and Technology of china Hefei 230026AnhuiChina department of engineering Physics Tsinghua UniversityBeijing 100084China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China National space science center Chinese Academy of SciencesBeijing 100190China school of Physics Peking UniversityBeijing 100871China center for Astrophysics Guangzhou UniversityGuangzhou 510006GuangdongChina school of Physics and Astronomy&school of Physics(guangzhou) Sun Yat-sen UniversityZhuhai 519000GuangdongChina school of Physical science and Technology Guangxi UniversityNanning 530004GuangxiChina h.b.i Normal university Shijiazhuang 050024HebeiChina school of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001HenanChina school of Astronomy and space science Nanjing UniversityNanjing 210023JiangsuChina key laboratory of Dark Matter and space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023JiangsuChina Institute of frontier and Interdisciplinary science Shandong UniversityQingdao 266237ShandongChina key laboratory for Research in galaxies and cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China Tsung-Dao lee Institute&school of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China school of Physical science and Technology&school of Information science and Technology Southwest Jiaotong UniversityChengdu 610031SichuanChina college of Physics Sichuan UniversityChengdu 610065SichuanChina key laboratory of cosmic Rays(Tibet university) Ministry of EducationLhasa 850000TibetChina school of Physic

Purpose Observation of high energy and very high emission from gamma Ray bursts(gRbs)is crucial to study the gigantic explosion and the underline *** a large field-of-view and almost full duty cycle,the Water cherenkov Detector Array(WcDA),a sub-array of the large high Altitude Air shower Observatory(lhAAsO),is appropriate to monitor the very high energy emission from unpredictable transients such as *** Nevertheless,the main issue for an extensive air shower array is the high energy threshold which limits the horizon of the *** address this issue a new trigger method is developed in this article to lower the energy threshold of WcDA for gRb *** The proposed method significantly improves the detection efficiency of WcDA for gamma-rays around the gRb direction at 10-300 *** sensitivity of the WcDA for gRb detection with the new trigger method is *** achieved sensitivity of the quarter WcDA array above 10 geV is comparable with that of *** data analysis process and corresponding fluence upper limit for gRb 190719c is presented as an example.

关键词： lhAAsO WcDA gRb

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A dynamic range extension system for lhAAsOWcDA-1

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Radiation Detection Technology and Methods 2021年第4期5卷 520-530页

作者： f.Aharonian Q.An Axikegu l.X.bai Y.X.bai Y.W.bao D.bastieri X.j.bi Y.j.bi h.cai j.T.cai Z.cao Z.cao j.chang j.f.chang X.c.chang b.M.chen j.chen l.chen l.chen l.chen M.j.chen M.l.chen Q.h.chen s.h.chen s.Z.chen T.l.chen X.l.chen Y.chen N.cheng Y.D.cheng s.W.cui X.h.cui Y.D.cui b.Z.Dai h.l.Dai Z.g.Dai Danzengluobu D.della Volpe b.D’Ettorre Piazzoli X.j.Dong j.h.fan Y.Z.fan Z.X.fan j.fang k.fang c.f.feng l.feng s.h.feng Y.l.feng b.gao c.D.gao Q.gao W.gao M.M.ge l.s.geng g.h.gong Q.b.gou M.h.gu j.g.guo X.l.guo Y.Q.guo Y.Y.guo Y.A.han h.h.he h.N.he j.c.he s.l.he X.b.he Y.he M.heller Y.k.hor c.hou X.hou h.b.hu s.hu s.c.hu X.j.hu D.h.huang Q.l.huang W.h.huang X.T.huang Y.huang Z.c.huang f.ji X.l.ji h.Y.jia k.jiang Z.j.jiang c.jin D.kuleshov k.levochkin b.b.li c.li c.li f.li h.b.li h.c.li h.Y.li j.l. k.li W.l.li X.li X.li X.R.li Y.li Y.Z.li Z.li Z.li E.W.liang Y.f.liang s.j.l.n b.liu c.liu D.liu h.liu h.D.liu j.l.u j.l.liu j.s.liu j.Y.liu M.Y.liu R.Y.liu s.M.liu W.liu Y.N.liu Z.X.liu W.j.l.ng R.lu h.k.lv b.Q.Ma l.l.Ma X.h.Ma j.R.Mao A.Masood W.Mitthumsiri T.Montaruli Y.c.Nan b.Y.Pang P.Pattarakijwanich Z.Y.Pei M.Y.Qi D.Ruffolo V.Rulev A.sáiz l.shao O.shchegolev X.D.sheng j.R.shi h.c.song Yu.V.stenkin V.stepanov Q.N.sun X.N.sun Z.b.sun P.h.T.Tam Z.b.Tang W.W.Tian b.D.Wang c.Wang h.Wang h.g.Wang j.c.Wang j.s.Wang l.P.Wang l.Y.Wang R.N.Wang W.Wang W.Wang X.g.Wang X.j.Wang X.Y.Wang Y.D.Wang Y.j.Wang Y.P.Wang Z.Wang Z.Wang Z.h.Wang Z.X.Wang D.M.Wei j.j.Wei Y.j.Wei T.Wen c.Y.Wu h.R.Wu s.Wu W.X.Wu X.f.Wu s.Q.Xi j.Xia j.j.Xia g.M.Xiang g.Xiao h.b.Xiao g.g.Xin Y.l.Xin Y.Xing D.l.xu R.X.xu l.xue D.h.Yan c.W.Yang f.f.Yang j.Y.Yang l.l.Yang M.j.Yang R.Z.Yang s.b.Yang Y.h.Yao Z.g.Yao Y.M.Ye l.Q.Yin N.Yin X.h.You Z.Y.You Y.h.Yu Q.Yuan h.D.Zeng T.X.Zeng W.Zeng Z.k.Zeng M.Zha X.X.Zhai b.b.Zhang h.M.Zhang h.Y.Zhang j.l.Zhang j.W.Zhang l.Zhang l.Zhang l.X.Zhang P.f.Zhang P.P.Zhang R.Zhang s.R.Zhang s.s.Zhang X.Zhang X.P.Zhang Y.Zhang Y.Zhang Y.f.Zhang Y.l.Zhang b.Zhao j.Zhao l.Zhao l.Z.Zhao s.P.Zhao f.Zheng Y.Zheng b.zhou h.zhou j.N.zhou key laboratory of Particle Astrophyics&Experimental Physics Division&computing center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China university of chinese Academy of sciences Beijing 100049China TIANfU cosmic Ray Research center ChengduSichuanChina state key laboratory of Particle Detection and Electronics BeijingChina university of science and Technology of china Hefei 230026AnhuiChina department of engineering Physics Tsinghua UniversityBeijing 100084China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China National space science center Chinese Academy of SciencesBeijing 100190China school of Physics Peking UniversityBeijing 100871China center for Astrophysics Guangzhou UniversityGuangzhou 510006GuangdongChina school of Physics and Astronomy&school of Physics(guangzhou) Sun Yat-sen UniversityZhuhai 519000GuangdongChina school of Physical science and Technology Guangxi UniversityNanning 530004GuangxiChina h.b.i Normal university Shijiazhuang 050024HebeiChina school of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001HenanChina school of Astronomy and space science Nanjing UniversityNanjing 210023JiangsuChina key laboratory of Dark Matter and space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023JiangsuChina Institute of frontier and Interdisciplinary science Shandong UniversityQingdao 266237ShandongChina key laboratory for Research in galaxies and cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China Tsung-Dao lee Institute&school of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China school of Physical science and Technology&school of Information science and Technology Southwest Jiaotong UniversityChengdu 610031SichuanChina college of Physics Sichuan UniversityChengdu 610065SichuanChina key laboratory of cosmic Rays(Tibet university) Ministry of EducationLhasa 850000TibetChina school of Physics

Purpose The main scientific.g.al of lhAAsO-WcDA is to survey gamma-ray sources with energy from 100 geV to 30 *** observe high-energy shower events,especially to measure the energy spectrum of cosmic rays from 100 TeV to 10 PeV,a dynamic range extension system(WcDA++)is designed to use a 1.5-inch PMT with a dynamic range of four orders of magnitude for each cell in *** The dynamic range is extended by using these PMTs to measure the effective charge density in the core region of air shower events,which is an important parameter for identifying the composition of primary *** and conclusion The system has been running for more than one *** this paper,the details of the design and performance of WcDA++are presented.

关键词： lhAAsO-WcDA WcDA++ Water cherenkov detector Performance

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Observation of the Y(4230)and a new structure in e^(+)e^(-)→k^(+)k^(-)j/Ψ

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chinese Physics c 2022年第11期46卷 7-21页

作者： M.Ablikim M.N.Achasov P.Adlarson M.Albrecht R.Aliberti A.Amoroso M.R.An Q.An X.h.b.i Y.bai O.bakina R.baldini ferroli I.balossino Y.ban V.batozskaya D.becker k.begzsuren N.berger M.bertani D.bettoni f.bianchi j.bloms A.bortone I.boyko R.A.briere A.brueggemann h.cai X.cai A.calcaterra g.f.cao N.cao s.A.cetin j.f.chang W.l.chang g.chelkov c.chen g.chen h.s.chen M.l.chen s.j.chen T.chen X.R.chen X.T.chen Y.b.chen Z.j.chen W.s.cheng X.chu g.cibinetto f.cossio j.j.cui h.l.Dai j.P.Dai A.Dbeyssi R.Ede boer D.Dedovich Z.Y.Deng A.Denig I.Denysenko M.Destefanis f.De Mori Y.Ding j.Dong l.Y.Dong M.Y.Dong X.Dong s.X.Du P.Egorov Y.l.fan j.fang s.s.fang W.X.fang Y.fang R.farinelli l.fava f.feldbauer g.felici c.Q.feng j.h.feng k f.s.her M.fritsch c.fritzsch c.D.fu h.gao Y.N.gao Yang gao s.garbolino I.garzia P.T.ge c.g.ng E.M.gersabeck A gilman k.goetzen l.gong W.X.gong W.gradl M.greco M.h.gu c.Y guan A.Q.guo l.b.guo R.P.guo Y.P.guo A.guskov T.T.han W.Y.han X.Q.hao f.A.harris.k.k.he k.l.he f.h.heinsius c.h.heinz Y.k.heng c.herold M.himmelreich T.holtmann g.Y.hou Y.R.hou Z.l.hou h.M.hu j.f.hu T.hu Y.hu g.s.huang k.X.huang l.Q.huang l.Q.huang X.T.huang Y.P.huang Z.huang T.hussain N husken W.Imoehl M.Irshad j.jackson s.jaeger s.janchiv Q.ji Q.P.ji X.b.ji X.l.ji Y.Y.ji Z.k.jia h.b.jiang s.s.jiang X.s.jiang Y.jiang j.b.jiao Z.jiao s.jin Y.jin M.Q.jing T.johansson N.kalantar-Nayestanaki X.s.k.ng R.kappert M.kavatsyuk b.c.ke I.k.kes.k.A.khoukaz P.kiese R.kiuchi R.kliemt l.koch O.b.kolcu b.kopf M.kuemmel M.kuessner A.kupsc W.kuhn j.j.l.ne j.s.lange P.larin A.lavania l.lavezzi Z.h.lei h.leithoff M.lellmann T.lenz c.li c.li c.h.li cheng li D.M.li f.li g.li h.li h.li h.b.li h.j.l. h.N.li j.Q.li j.s.li j.W.li ke li l.j.l. l.k.li lei li M.h.li P.R.li s.X.li s.Y.li T.li W.D.li W.g.li X.h.li X.l.li Xiaoyu li Z.Y.li h.liang h.liang h.liang Y.f.liang Y.T.liang g.R.liao l.Z.liao j.l.bby A.limphirat c.X.lin D.X.lin T.lin b.j.l.u c.X.liu D.liu f.h.liu fang liu feng liu g.M.liu h.liu h.M.liu huanhuan liu huihui liu j.b.liu j.l.liu j.Y.liu k.liu k.Y.l Institute of high Energy Physics Beijing 100049China beihang university Beijing 100191China beijing Institute of Petrochemical Technology Beijing 102617China bochum Ruhr-university D-44780 BochumGermany carnegie Mellon university PittsburghPennsylvania 15213USA central china Normal university Wuhan 430079China china center of Advanced science and Technology Beijing 100190China cOMsATs university Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan fudan university Shanghai 200433China g.I.budker Institute of Nuclear Physics sb RAs(bINP) Novosibirsk 630090Russia gsI helmholtzcentre for heavy Ion Research gmbh D-64291 DarmstadtGermany guangxi Normal university Guilin 541004China hangzhou Normal university Hangzhou 310036China helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany henan Normal university Xinxiang 453007China henan university of science and Technology Luoyang 471003China henan university of Technology Zhengzhou 450001China huangshan college Huangshan 245000China hunan Normal university Changsha 410081China hunan university Changsha 410082China Indian Institute of Technology Madras Chennai 600036India Indiana university BloomingtonIndiana 47405USA INfN laboratori Nazionali di frascati INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly INfN laboratori Nazionali di frascati INFN Sezione di PerugiaI-06100PerugiaItaly INfN laboratori Nazionali di frascati University of PerugiaI-06100PerugiaItaly INfN sezione di ferrara INFN Sezione di FerraraI-44122FerraraItaly INfN sezione di ferrara University of FerraraI-44122FerraraItaly Institute of Modern Physics Lanzhou 730000China Institute of Physics and Technology Peace Ave.54BUlaanbaatar 13330Mongolia j.l.n university Changchun 130012China johannes gutenberg university of Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany joint Institute for Nuclear Research 141980 DubnaMoscow regionRussia justus-liebig-Universitaet giessen II.Physikalisches InstitutHeinrich-Buff-Ring 16

The cross sections of e^(+)e^(-)→k^(+)k^(-)j/Ψat center-of-mass energies from 4.127 to 4.600 geV are measured based on 15.6 fb-1data collected with the bEsⅢ detector operating at the bEPcⅡ storage *** resonant structures are observed in the line shape of the cross *** mass and width of the first structure are measured to be(4225.3±2.3±21.5)MeV and(72.9±6.1±30.8)MeV,*** are consistent with those of the established Y(4230).The second structure is observed for the first time with a statistical significance greater than 8σ,denoted as Y(4500).Its mass and width are determined to be(4484.7±13.3±24.1)MeV and(111.1±30.1±15.2)MeV,*** first presented uncertainties are statistical and the second ones are *** product of the electronic partial width with the decay branching fractionΓ(Y(4230)→e^(+)e^(−))b(Y(4230)→k^(+)k^(−)j/Ψ)is reported.

关键词： Y states charmonium-like states bEsⅢ

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Measurements of the center-of-mass energies of e^(+)e^(-)collisions at bEsIII

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chinese Physics c 2021年第10期45卷 7-15页

作者： M.Ablikim M.N.Achasov P.Adlarson s.Ahmed M.Albrecht R.Aliberti A.Amoroso M.R.An Q.An X.h.b.i Y.bai O.bakina R.baldini ferroli I.balossino Y.ban k.begzsuren N.berger M.bertani D.bettoni f.bianchi j.bloms A.bortone I.boyko R.A.briere h.cai X.cai A.calcaterra g.f.cao N.cao s.A.cetin j.f.chang W.l.chang g.chelkov D.Y.chen g.chen h.s.chen M.l.chen s.j.chen X.R.chen Y.b.chen Z.j.chen W.s.cheng g.cibinetto f.cossio X.f.cui h.l.Dai X.c.Dai A.Dbeyssi R.E.de boer D.Dedovich Z.Y.Deng A.Denig I.Denysenko M.Destefanis f.De Mori Y.Ding c.Dong j.Dong l.Y.Dong M.Y.Dong X.Dong s.X.Du Y.l.fan j.fang s.s.fang Y.fang R.farinelli l.fava f.feldbauer g.felici c.Q.feng j.h.feng M.fritsch c.D.fu Y.gao Y.gao Y.gao Y.g.gao I.garzia P.T.ge c.g.ng E.M.gersabeck A gilman k.goetzen l.gong W.X.gong W.gradl M.greco l.M.gu M.h.gu Y.T.gu c.Y guan A.Q.guo l.b.guo R.P.guo Y.P.guo A.guskov T.T.han W.Y.han X.Q.hao f.A.harris.k.l.he f.h.heinsius c.h.heinz T.held Y.k.heng c.herold M.himmelreich T.holtmann g.Y.hou Y.R.hou Z.l.hou h.M.hu j.f.hu T.hu Y.hu g.s.huang l.Q.huang X.T.huang Y.P.huang Z.huang T.hussain N husken W.Ikegami Andersson W.Imoehl M.Irshad s.jaeger s.janchiv Q.ji Q.P.ji X.b.ji X.l.ji Y.Y.ji h.b.jiang X.s.jiang j.b.jiao Z.jiao s.jin Y.jin M.Q.jing T.johansson N.kalantar-Nayestanaki X.s.k.ng R.kappert M.kavatsyuk b.c.ke I.k.kes.k.A.khoukaz P.kiese R.kiuchi R.kliemt l.koch O.b.kolcu b.kopf M.kuemmel M.kuessner A.kupsc M.g.kurth W.kuhn j.j.l.ne j.s.lange P.larin A.lavania l.lavezzi Z.h.lei h.leithoff M.lellmann T.lenz c.li c.h.li cheng li D.M.li f.li g.li h.li h.li h.b.li h.j.l. j.l.li j.Q.li j.s.li ke li l.k.li lei li P.R.li s.Y.li W.D.li W.g.li X.h.li X.l.li Xiaoyu li Z.Y.li h.liang h.liang h.liang Y.f.liang Y.T.liang g.R.liao l. Z. liao j.l.bby c.X.lin b.j.l.u c.X.liu D.liu f.h.liu fang liu feng liu h.b.liu h.M.liu huanhuan liu huihui liu j.b.liu j.l.liu j.Y.liu k.liu k.Y.liu l.liu M.h.liu P.l.liu Q.liu Q.liu s.b.liu shuai liu T.liu W.M.liu X.liu Y.liu Y.b.liu Z.A.liu Z.Q.liu X.c.lou f.X.lu h.j.l. j.D.lu j.g.lu X.l.lu Y.lu Y.P.lu c.l.luo Institute of high Energy Physics Beijing 100049China beihang university Beijing 100191China beijing Institute of Petrochemical Technology Beijing 102617China bochum Ruhr-university D-44780 BochumGermany carnegie Mellon university PittsburghPennsylvania 15213USA central china Normal university Wuhan 430079China china center of Advanced science and Technology Beijing 100190China cOMsATs university Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan fudan university Shanghai 200443China g.I.budker Institute of Nuclear Physics sb RAs(bINP) Novosibirsk 630090Russia gsI helmholtzcentre for heavy Ion Research gmbh D-64291 DarmstadtGermany guangxi Normal university Guilin 541004China guangxi university Nanning 530004China hangzhou Normal university Hangzhou 310036China helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany henan Normal university Xinxiang 453007China henan university of science and Technology Luoyang 471003China huangshan college Huangshan 245000China hunan Normal university Changsha 410081China hunan university Changsha 410082China Indian Institute of Technology Madras Chennai 600036India Indiana university BloomingtonIndiana 47405USA INfN laboratori Nazionali di frascati INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly INfN laboratori Nazionali di frascati INFN Sezione di PerugiaI-06100PerugiaItaly INfN laboratori Nazionali di frascati University of PerugiaI-06100PerugiaItaly INfN sezione di ferrara INFN Sezione di FerraraI-44122FerraraItaly INfN sezione di ferrara University of FerraraI-44122FerraraItaly 25Institute of Modern PhysicsLanzhou 730000China Institute of Modern Physics Lanzhou 730000China Institute of Physics and Technology Peace Ave.54BUlaanbaatar 13330Mongolia j.l.n university Changchun 130012China johannes gutenberg university of Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany joint Institute for Nuclear Research 141980 DubnaMoscow regionRussia justus-liebig-Universitaet giessen II.Physikali

During the 2016-17 and 2018-19 running periods,the bEsIII experiment collected 7.5 fb of e^(+)e^(-)collision data at center-of-mass energies ranging from 4.13 to 4.44 *** data samples are primarily used for the study of excited charmonium and charmoniumlike *** analyzing the di-muon process e^(+)e^(-)→(γIsR=fsR)μ^(+)μ^(-),we measure the center-of-mass energies of the data samples with a precision of 0.6 *** a run-by-run study,we find that the center-of-mass energies were stable throughout most of the data-collection period.

关键词： center-of-mass energy e^(+)e^(-) annihilation bEsIII

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Performance of lhAAsO-WcDA and observation of the crab Nebula as a standard candle

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chinese Physics c 2021年第8期45卷 166-181页

作者： f.Aharonian Q.An Axikegu l.X.bai Y.X.bai Y.W.bao D.bastieri X.j.bi Y.j.bi h.cai j.T.cai Z.cao Z.cao j.chang j.f.chang X.c.chang b.M.chen j.chen l.chen l.chen l.chen M.j.chen M.l.chen Q.h.chen s.h.chen s.Z.chen T.l.chen X.l.chen Y.chen N.cheng Y.D.cheng s.W.cui X.h.cui Y.D.cui b.Z.Dai h.l.Dai Z.g.Dai Danzengluobu D.della Volpe b.D'Ettorre Piazzoli X.j.Dong j.h.fan Y.Z.fan Z.X.fan j.fang k.fang c.f.feng l.feng s.h.feng Y.l.feng b.gao c.D.gao Q.gao W.gao M.M.ge l.s.geng g.h.gong Q.b.gou M.h.gu j.g.guo X.l.guo Y.Q.guo Y.Y.guo Y.A.han h.h.he h.N.he j.c.he s.l.he X.b.he Y.he M.heller Y.k.hor c.hou X.hou h.b.hu s.hu s.c.hu X.j.hu D.h.huang Q.l.huang W.h.huang X.T.huang Z.c.huang f.ji X.l.ji h.Y.jia k.jiang Z.j.jiang c.jin D.kuleshov k.levochkin b.b.li c.li c.li f.li h.b.li h.c.li h.Y.li j.l. k.li W.l.li X.li X.li X.R.li Y.li Y.Z.li Z.li Z.li E.W.liang Y.f.liang s.j.l.n b.liu c.liu D.liu h.liu h.D.liu j.l.u j.l.liu j.s.liu j.Y.liu M.Y.liu R.Y.liu s.M.liu W.liu Y.N.liu Z.X.liu W.j.l.ng R.lu h.k.lv b.Q.Ma l.l.Ma X.h.Ma j.R.Mao A.Masood W.Mitthumsiri T.Montaruli Y.c.Nan b.Y.Pang P.Pattarakijwanich Z.Y.Pei M.Y.Qi b.Q.Qiao D.Ruffolo V.Rulev A.saiz l.shao O.shchegolev X.D.sheng j.R.shi h.c.song Yu.V.stenkin V.stepanov Q.N.sun X.N.sun Z.b.sun P.h.T.Tam Z.b.Tang W.W.Tian b.D.Wang c.Wang h.Wang h.g.Wang j.c.Wang j.s.Wang l.P.Wang l.Y.Wang R.N.Wang W.Wang W.Wang X.g.Wang X.j.Wang X.Y.Wang Y.D.Wang Y.j.Wang Y.P.Wang Z.Wang Z.Wang Z.h.Wang Z.X.Wang D.M.Wei j.j.Wei Y.j.Wei T.Wen c.Y.Wu h.R.Wu s.Wu W.X.Wu X.f.Wu s.Q.Xi j.Xia j.j.Xia g.M.Xiang g.Xiao h.b.Xiao g.g.Xin Y.l.Xin Y.Xing D.l.xu R.X.xu l.xue D.h.Yan c.W.Yang f.f.Yang j.Y.Yang l.l.Yang M.j.Yang R.Z.Yang s.b.Yang Y.h.Yao Z.g.Yao Y.M.Ye l.Q.Yin N.Yin X.h.You Z.Y.You Y.h.Yu Q.Yuan h.D.Zeng T.X.Zeng W.Zeng Z.k.Zeng M.Zha X.X.Zhai b.b.Zhang h.M.Zhang h.Y.Zhang j.l.Zhang j.W.Zhang l.Zhang l.Zhang l.X.Zhang P.f.Zhang P.P.Zhang R.Zhang s.R.Zhang s.s.Zhang X.Zhang X.P.Zhang Y.Zhang Y.Zhang Y.f.Zhang Y.l.Zhang b.Zhao j.Zhao l.Zhao l.Z.Zhao s.P.Zhao f.Zheng Y.Zheng b.zhou h.zhou j.N.zhou key laboratory of Particle Astrophyics&Experimental Physics Division&computing center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China university of chinese Academy of sciences Beijing 100049China TIANfU cosmic Ray Research center ChengduSichuanChina state key laboratory of Particle Detection and Electronics China university of science and Technology of china Hefei 230026China department of engineering Physics Tsinghua UniversityBeijing 100084China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China National space science center Chinese Academy of SciencesBeijing 100190China school of Physics Peking UniversityBeijing 100871China center for Astrophysics Guangzhou UniversityGuangzhou 510006China school of Physics and Astronomy&school of Physics(guangzhou) Sun Yat-sen UniversityZhuhai 519082China school of Physical science and Technology Guangxi UniversityNanning 530004China h.b.i Normal university Shijiazhuang 050024China school of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China school of Astronomy and space science Nanjing UniversityNanjing 210023China key laboratory of Dark Matter and space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China Institute of frontier and Interdisciplinary science Shandong UniversityQingdao 266237China key laboratory for Research in galaxies and cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China Tsung-Dao lee Institute&school of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China school of Physical science and Technology&school of Information science and Technology Southwest Jiaotong UniversityChengdu 610031China college of Physics Sichuan UniversityChengdu 610065China key laboratory of cosmic Rays(Tibet university) Ministry of EducationLhasa 850000China school of Physics and Technology Wuhan UniversityWuhan 430072China school of Physics and Astronomy Yunnan University

The first Water cherenkov detector of the lhAAsO experiment(WcDA-1)has been operating since April *** data for the first year have been analyzed to test its performance by observing the crab Nebula as a standard *** WcDA-1 achieves a sensitivity of 65 mcU per year,with a statistical threshold of 5 *** accomplish this,a 97.7%cosmic-ray bac.g.ound rejection rate around 1 TeV and 99.8%around 6 TeV with an ap proximate photon acceptance of 50%is achieved after applying an algorithm to separate gamma-induced *** angular resolution is measured using the crab Nebula as a point source to be approximately 0.45°at 1 TeV and better than 0.2°above 6 TeV,with a pointing accuracy better than 0.05°.These values all match the design *** energy resolution is found to be 33%for gamma rays around 6 *** spectral energy distribution of the crab Nebula in the range from 500 geV to 15.8 TeV is measured and found to be in agreement with the results from other TeV gamma ray observatories.

关键词： lhAAsO-WcDA crab Nebula angular resolution spectral energy distribution

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Number of j/ψ events at bEsIII

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chinese Physics c 2022年第7期46卷 74-84页

作者： M.Ablikim M.N.Achasov P.Adlarson s.Ahmed M.Albrecht R.Aliberti A.Amoroso M.R.An Q.An X.h.b.i Y.bai O.bakina R.baldini ferroli I.balossino Y.ban k.begzsuren N.berger M.bertani D.bettoni f.bianchi j.bloms A.bortone I.boyko R.A.briere h.cai X.cai A.calcaterra g.f.cao N.cao s.A.cetin j.f.chang W.l.chang g.chelkov g.chen h.s.chen M.l.chen s.j.chen X.R.chen Y.b.chen Z.j.chen W.s.cheng g.cibinetto f.cossio j.j.cui X.f.cu h.l.Dai j.P.Dai X.c.Dai A.Dbeyssi R.E.de boer D.Dedovich Z.Y.Deng A.Denig I.Denysenko M.Destefanis f.De Mori Y.Ding c.Dong j.Dong l.Y.Dong M.Y.Dong X.Dong s.X.Du P.Egorov Y.l.fan j.fang s.s.fang Y.fang R.farinelli l.fava f.feldbauer g.felici c.Q.feng j.h.feng M.fritsch c.D.fu Y.gao Y.gao I.garzia P.T.ge c.g.ng E.M.gersabeck A gilman k.goetzen l.gong W.X.gong W.gradl M.greco l.M.gu M.h.gu c..Y.guan A.Q.guo A.Q.guo l.b.guo R.P.guo Y.P.guo A.guskov T.T.han W.Y.han X.Q.hao f.A.harris.k.k.he k.l.he f.h.heinsius c.h.heinz Y.k.heng c.herold M.himmelreich T.holtmann g.Y.hou Y.R.hou Z.l.hou h.M.hu j.f.hu T.hu Y.hu g.s.huang l.Q.huang X.T.huang Y.P.huang Z.huang T.hussain N husken W.Ikegami Andersson W.Imoehl M.Irshad s.jaeger s.janchiv Q.ji Q.P.ji X.b.ji X.l.ji Y.Y.ji h.b.jiang X.s.jiang j.b.jiao Z.jiao s.jin Y.jin M.Q.jing T.johansson N.kalantar-Nayestanaki X.s.k.ng R.kappert M.kavatsyuk b.c.ke I.k.kes.k.A.khoukaz P.kiese R.kiuchi R.kliemt l.koch O.b.kolcu b.kopf M.kuemmel M.kuessner A.kupsc M.g.kurth W.kuhn j.j.l.ne j.s.lange P.larin A.lavania l.lavezzi Z.h.lei h.leithoff M.lellmann T.lenz c.li c.h.li cheng li D.M.li f.li g.li h.li h.li h.b.li h.j.l. h.N.li j.l.li j.Q.li j.s.li ke li l.k.li lei li P.R.li s.Y.li W.D.li W.g.li X.h.li X.l.li Xiaoyu li Z.Y.li h.liang h.liang h.liang Y.f.liang Y.T.liang g.R.liao l.Z.liao j.l.bby A.limphirat c.X.lin D.X.lin T.lin b.j.l.u c.X.liu D.liu f.h.liu fang liu feng liu g.M.liu h.M.liu huanhuan liu huihui liu j.b.liu j.l.liu j.Y.liu k.liu k.Y.liu ke liu l.liu M.h.liu P.l.liu Q.liu Q.liu s.b.liu T.liu T.liu W.M.liu X.liu Y.liu Y.b.liu Z.A.liu Z.Q.liu X.c.lou f.X.lu h.j.l. j.D. Institute of high Energy Physics Beijing 100049China beihang university Beijing 100191China beijing Institute of Petrochemical Technology Beijing 102617China bochum Ruhr-university D-44780 BochumGermany camnegie Mellon university PittsburghPennsylvania 15213USA central china Normal university Wuhan 430079China china center of Advanced science and Technology Beijing 100190China cOMsATs university Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan fudan university Shanghai 200443China g.I.budker Institute of Nuclear Physies sbRAs(bINP) Novosibirsk 630090Russia gsI helmholtzcentre for heavy Ion Research gmbh D-64291 DarmstadtGermany guangxi Normal university Guilin 541004China hangzhou Normal university Hangzhou 310036China helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany henan Normal university Xinxiang 453007China henan university of science and Technology Luoyang 471003China henan university of Technology Zhengzhou 450001China huangshan college Huangshan 245000China hunan Normal university Changsha 410081China hunan university Changsha 410082China Indian Institute of Technology Madras Chennai 600036India Indiana university BloomingtonIndiana 47405USA INfN laboratori Nazionali di frascati I-00044FrascatiItaly INfN sezione di Perugia I-06100PerugiaItaly university of Perugia I-06100PerugiaItaly university of ferrara I-44122FerraraItaly Institute of Modern Physics Lanzhou 730000China Institute of Physies and Technology Peace Ave 54BUlaanbaatar 13330Mongolia j.l.n university Changchun 130012China johannes gutenberg university of Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany joint Institute for Nuclear Research 141980 DubnaMoscow regionRussia justus-liebig-Universitaet giessen Ⅱ.Physikaliches InstitutHeinricH-Buff-Ring 16D-35392 GiessenGermany lanzhou university Lnzhou 730000China liaoning Normal university Dalian 116029China liaoning university Shenyang 110036China Nanjing Normal university Nanjing 210023China Nanjing Univ

Using inclusive decays of j/ψ aprecise determination of the number of j/ψ events collected with the bEsIII detector was *** the two data sets taken in 2009 and 2012,the numbers of j/ψ events were recalculated to be(224.0±1.3)×10^(6) and(1088.5±4.4)×10^(6),respectively;these numbers are in good agreement with the previous measurements. for the j/ψ sample taken in 2017-2019,the number of events was determined to be(8774.0±39.4)×10^(6).The total number of j/ψ events collected with the bEsIII detector was determined to be(10087±44)×10^(6),where the uncertainty is dominated by systematic effects,and the statistical uncertainty is negligible.

关键词： number of j/ψevents bEsIII detector inclusive j/ψdecays

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Evidence for the decays of ∧_c^+→∑^+η and ∑^+η’

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chinese Physics c 2019年第8期43卷 15-23页

作者： M.Ablikim f.f.An Q.An Y.bai Y.ban h.cai X.cai g.f.cao j.f.chang g.chen h.s.chen j.c.chen M.l.chen P.l.chen s.j.chen Y.b.chen W.cheng h.lDai j.P.Dai Z.Y.Deng Y.Ding c.Dong j.Dong l.Y.Dong M.Y.Dong Z.l.Dou s.X.Du P.f.Duan j.Z.fan j.fang s.s.fang Y.fang c.Q.feng c.D.fu Y.fu Q.gao X.l.gao Y.gao Y.g.gao Z.gao l.gong W.X.gong l.M.gu M.h.gu Y.T.gu A.Q.guo l.b.guo R.P.guo Y.P.guo s.han X.Q.hao k.l.he Y.k.heng Z.l.hou h.M.hu j.f.hu T.hu Y.hu g.s.huang j.s.huang X.T.huang X.Z.huang Z.l.huang Q.ji Q.P.ji X.b.ji X.l.ji X.s.jiang X.Y.jiang j.b.jiao Z.jiao D.P.jin s.jin Y.jin X.s.k.ng b.c.ke c.li cheng li D.M.li f.li f.Y.li g.li h.b.li h.j.l. j.c.li j.W.li ke li lei li P.l.li P.R.li Q.Y.li T.li W.D.li W.g.li X.l.li X.N. li X.Q.li Z.b.li h.liang Y.f.liang Y.T.liang g.R.liao l.Z.liao c.X.lin D.X.lin b.liu b.j.l.u c.X.liu D.liu D.Y.liu f.h.liu fang liu feng liu h.b.liu h.l.liu h.M.liu huanhuan liu huihui liu j.b.liu j.Y.liu k.liu k.Y.liu ke liu Q.liu s.b.liu X.liu Y.b.liu Z.A.liu Zhiqing liu Y.f.long X.c.lou h.j.l. j.D.lu j.g.lu Y.lu Y.P.lu c.l.luo M.X.luo T.luo X.l.luo X.R.lyu f.c.Ma h.l.Ma l.l.Ma M.M.Ma Q.M.Ma X.N.Ma X.X.Ma X.Y.Ma Y.M.Ma Y.j.Mao Z.P.Mao Z.X.Meng j.Min T.j.Min X.h.Mo Y.j.Mo Z.Ning s.l.Niu s.l.Olsen Q.Ouyang Y.Pan h.P.Peng j.l.Ping R.g.Ping h.R.Qi M.Qi T.Y.Qi s.Qian c.f.Qiao N.Qin Z.h.Qin j.f.Qiu s.Q.Qu g.Rong W.shan X.Y.shan M.shao c.P. shen P.X.shen X.Y.shen h.Y.sheng X.shi j.j.song X.Y.song g.X.sun j.f.s.n l.sun s.s.sun X.h.sun Y.j.sun Y.k.sun Y.Z.sun Z.j.sun Z.T.sun Y.T.Tan c.j.Tang g.Y.Tang X.Tang b.Wang b.l.Wang c.W.Wang D.Y.Wang Dan Wang k.Wang l.l.Wang l.s.Wang M.Wang Meng Wang P.Wang P.l.Wang W.P.Wang X.f.Wang Y.Wang Y.f.Wang Z.Wang Z.g.Wang Z.Y.Wang Zongyuan Wang D.h.Wei s.P.Wen l.h.Wu l.j.Wu Z.Wu l.Xia Y.Xia D.Xiao Y.j.Xiao Z.j.Xiao Y.g.Xie Y.h.Xie X.A.Xiong Q.l.Xiu g.f.xu j.j.xu l.xu Q.j.xu Q.N.xu X.P.xu f.Yan l.Yan w.b.Yan W.c.Yan Y.h.Yan h.j.Yang h.X.Yang l.Yang s.l.Yang Y.h.Yang Y.X.Yang Yifan Yang Z.Q.Yang M.Ye M.h.Ye j.h.Yin Z.Y.You b.X.Yu c.X.Yu j.s.Yu c.Z.Yuan Y.Yuan Y.Zeng b.X.Zhang b.Y.Zhang Institute of high Energy Physics g.I.budker Institute of Nuclear Physics sb RAs(bINP) the Novosibirsk state university helmholtz Institute Mainz bochum Ruhr-university university of Turin INfN state key laboratory of Particle Detection and Electronics university of science and Technology of china southeast university joint Institute for Nuclear Research INfN laboratori Nazionali di frascati Peking university Institute of Physics and Technology Indiana university Bloomington carnegie Mellon university johannes gutenberg university of Mainz INfN sezione di ferrara Wuhan university Ankara university university of chinese Academy of sciences Istanbul bilgi university the Moscow Institute of Physics and Technology the functional Electronics laboratory Tomsk State University university of.s.uth china Nanjing university shanghai jiao Tong university key laboratory for Particle Physics Astrophysics and CosmologyMinistry of EducationShanghai Key Laboratory for Particle Physics and CosmologyInstitute of Nuclear and Particle Physics liaoning university Nankai university Zhengzhou university Tsinghua university university of ferrara university of Eastern Piedmont central china Normal university university of Minnesota Minneapolis gsI helmholtzcentre for heavy Ion Research gmbh guangxi university Nanjing Normal university kVI-cART University of Groningen henan Normal university university of hawaii Honolulu shandong university university of the Punjab university of Muenster Uppsala university huangshan college university of jinan justus-liebig-Universitaet giessen II.Physikalisches Institut Istanbul Arel university soochow university beijing Institute of Petrochemical Technology china center of Advanced science and Technology sun Yat-sen university sichuan university guangxi Normal university Indian Institute of Technology Madras shanxi university henan university of science and Technology lanzhou university Zhejiang university fudan university key laboratory of Nuclear Physics and Ion-beam Application(MOE)and Institute of

We study the hadronic decays of ∧c+ to the final states ∑+η and ∑+η’,using an e+e-annihilation data sample of 567 pb-1 taken at a center-of-mass energy of 4.6 geV with the bEsIII detector at the bEPcⅡ *** find evidence for the decays ∧c+→∑+η and ∑+η’ with statistical significance of 2.5σ and 3.2σ,*** to the reference decays ∧c+→∑+π0 and ∑+ω,we obtain the ratios of the branching fractions■and ■to be 0.35±0.16±0.02 and 0.86±0.34±0.04,*** upper limits at the 90% confidence level are set to be■and■.Using bEsIII measurements of the branching fractions of the reference decays,we determine b（∧c+→∑+η）=（0.41±0.19±0.05）%（b（∧c+→∑+η’）=（1.34±0.53 ±0.19）%（here,the first uncertainties are statistical and the second *** obtained branching fraction of ∧c+→∑+η is consistent with the previous measurement,and the branching fraction of ∧c+→∑+η’ is measured for the first time.

关键词： charmed baryon ∧c^+ decays branching fractions

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Prospects for a multi-TeV gamma-ray sky survey with the lhAAsO water cherenkov detector array

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chinese Physics c 2020年第6期44卷 123-132页

作者： f.Aharonian V.Alekseenko Q.An Axikegu l.X.bai Y.W.bao D.bastieri9 X.j.bi h.cai Zhe cao Zhen cao j.chang j.f.chang X.c.chang s.P.chao b.M.chen j.chen l.chen l.chen M.l.chen M.j.chen Q.h.chen s.h.chen s.Z.chen T.l.chen X.l.chen Y.chen N.cheng Y.D.cheng s.W.cui X.h.cui Y.D.cui b.Z.Dai h.l.Dai Z.g.Dai Danzengluobu b.D'Ettorre Piazzoli j.fang j.h.fan Y.Z.fan c.f feng l.feng s.h.feng Y.l.feng b.gao Q.gao W.gao M.M.ge l.s.geng g.h.gong Q.b.gou M.h.gu Y.Q.guo Y.Y.guo Y.A.han h.h.he j.c.he M.heller s.l.he Y.he c.hou D.h.huang Q.l.huang W.h.huang X.T.huang h.b.hu s.hu h.Y.jia k.jiang f.ji c.jin X.l.ji k.levochkin E.W.liang Y.f liang cheng li cong li f.li h.li h.b.li h.c.li h.M.li j.l. k.li W.l.li X.li X.R.li Y.li Z.li Z.li b.liu c.liu D.liu h.D.liu h.liu j.l.u j.Y.liu M.Y.liu R.Y.liu s.M.liu W.liu Y.N.liu Z.X.liu W.j.l.ng R.lu h.k.lv b.Q.Ma l.l.Ma j.R.Mao A.Masood X.h.Ma W.Mitthumsiri T.Montaruli Y.c.Nan P.Pattarakijwanich Z.Y.Pei b.Q.Qiao M.Y.Qi D.Ruffolo V.Rulev A.sáiz l.shao O.shchegolev X.D.sheng j.R.shi Y.stenkin V.stepanov Z.b.sun P.h.T.Tam Z.b.Tang W.W.Tian D.D.Volpe c.Wang h.Wang h.g.Wang j.c.Wang l.Y.Wang W.Wang W.Wang X.g.Wang X.Y.Wang X.j.Wang Y.D.Wang Y.j.Wang Y.N.Wang Y.P.Wang Z.Wang Z.h.Wang Z.X.Wang D.M.Wei j.j.Wei T.Wen c.Y.Wu h.R.Wu s.Wu W.X.Wu X.f.Wu g.M.Xiang g.Xiao g.g.Xin Y.Xing R.X.xu l.xue D.h.Yan c.W.Yang f.f.Yang l.l.Yang M.j.Yang R.Z.Yang s.b.Yang Y.h.Yao Z.g.Yao Y.M.Ye l.Q.Yin N.Yin X.h.You Z.Y.You Q.Yuan Y.h.Yu Z.j.jiang h.D.Zeng T.X.Zeng W.Zeng Z.k.Zeng M.Zha b.b.Zhang h.M.Zhang h.Y.Zhang j.l.Zhang j.W.Zhang l.Zhang P.f.Zhang P.P.Zhang s.R.Zhang s.s.Zhang X.Zhang X.P.Zhang Yi Zhang Yong Zhang Y.f.g Zhang b.Zhao j.Zhao l.Zhao l.Z.Zhao f.Zheng Y.Zheng j.N.zhou P.zhou R.zhou X.X.zhou c.g.Zhu f.R.Zhu h.Zhu k.j.Zhu X.Zuo Institute of high Energy Physics Chinese Academy of SciencesBeijing 100049China university of chinese Academy of sciences Beijing 100049China TIANfU cosmic Ray Research center ChengduShichuanChina university of science and Technology of china 230026 HefeiAnhuiChina Tsinghua university 100084 BeijingChina National Astronomical Observatories Chinese Academy of Sciences100101 BeijingChina National space science center Chinese Academy of Sciences100190 BeijingChina school of Physics Peking University100871 BeijingChina center for Astrophysics Guangzhou University510006 GuangzhouGuangdongChina sun Yat-sen university 519000 ZhuhaiGuangdongChina shool of Physics and Technology Guangxi University530004 NanningGuangxiChina h.b.i Normal university 050024 ShijiazhuangHebeiChina school of Physics and engineering Zhengzhou University450001 ZhengzhouHenanChina Nanjing university 210023 NanjingJiangsuChina key laboratory of Dark Matter and space Astronomy Purple Mountain ObservatoryChinese Academy of Sciences210034 NanjingJiangsuChina Institute of frontier and Interdisciplinary science Shandong University266237 QingdaoShandongChina shanghai Astronomical Observatory Chinese Academy of Sciences200030 ShanghaiChina school of Physical science and Technology Southwest Jiaotong University610031 ChengduSichuanChina sichuan university 610065 ChengduSichuanChina key laboratory of cosmic Rays(Tibet university) Ministry of Education850000 LhasaTibetChina school of physics and technology Wuhan university430072 WuhanChina Yunnan university 650091 KunmingYunnanChina Yunnan Astronomical Observatories Chinese Academy of Sciences650216 KunmingYunnanChina Institute for Nuclear Research Russian Academy of SciencesMoscowRussia Département de Physique Nucléaire et corpusculaire Facultéde SciencesUniversitéde GenéveGenevaSwitzerland department of Physics Faculty of ScienceMahidol UniversityBangkokThailand Dublin Institute for Advanced studies 31 Fitzwilliam PlaceDublin 2Ireland Max-Planc

The Water cherenkov Detector Array(WcDA) is a major component of the large high Altitude Air shower Array Observatory(lhAAsO), a new generation cosmic-ray experiment with unprecedented sensitivity, currently under construction. WcDA is aimed at the study of TeV γ-rays. In order to evaluate the prospects of.s.arching for TeV γ-ray sources with WcDA, we present a projection of the one-year sensitivity of WcDA to TeV γ-ray sources from TeVcat using an all-sky approach. Out of 128 TeVcat sources observable by WcDA up to a zenith angle of 45°, we estimate that 42 would be detectable in one year of observations at a median energy of 1 TeV. Most of them are galactic sources, and the extragalactic sources are Active galactic Nuclei(AgN).

关键词： TeVγ-ray astronomy observational prospect lhAAsO-WcDA

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