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洛川红黏土-黄土记录的风向变化及磁组构与磁化率对气候变化的敏感性对比

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地球环境学报 2020年第1期11卷 66-71,111页

作者：谢兴俊常秋芳孔祥辉北京师范大学地球科学前沿交叉研究中心北京100875 中国科学院地球环境研究所黄土与第四纪地质国家重点实验室西安710061 陕西省加速器质谱技术及应用重点实验室西安加速器质谱中心西安710061 郑州师范学院地理与旅游学院郑州450044

磁组构分析是研究季风风向的一种常用手段。对洛川黄土剖面黄土-红黏土界线附近地层进行磁组构研究表明:洛川剖面新近纪-第四纪过渡时期,风向整体呈南北向,且从红黏土沉积阶段到黄土沉积阶段,风向呈现顺时针方向的微小偏移,这可能与新... 详细信息

磁组构分析是研究季风风向的一种常用手段。对洛川黄土剖面黄土-红黏土界线附近地层进行磁组构研究表明:洛川剖面新近纪-第四纪过渡时期,风向整体呈南北向,且从红黏土沉积阶段到黄土沉积阶段,风向呈现顺时针方向的微小偏移,这可能与新近纪到第四纪的气候变化背景有关。另外,磁化率各向异性度P、磁线理L、磁面理F等参数曲线与磁化率曲线的对比显示:磁化率各向异性P、L、F参数的变化稍超前于磁化率曲线的变化,这与蓝田段家坡剖面的磁组构研究结果类似。导致以上结果的原因尚未确定,但可能与磁组构信息被记录于沉积物的速度快于沉积物磁化率值的改变有关。

关键词：黄土红黏土磁组构风向磁化率各向异性

Improved measurement of electron antineutrino disappearance at Daya Bay

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Chinese Physics C 2013年第1期37卷 1-20页

作者：安丰鹏安琪白景芝 A.B.Balantekin H.R.Band W.Beriguete M.Bishai S.Blyth R.L.Brown 曹国富曹俊 R.Carr W.T.Chan 常劲帆 Y.chang C.Chasman 陈和生 H.Y.Chen 陈申见陈少敏陈潇聪陈晓辉陈晓苏陈羽陈义学 J.J.Cherwinka 朱明中 J.P.Cummings 邓子艳丁雅韵 M.V.Diwan E.Draeger 杜小峰 D.Dwyer W.R.Edwards S.R.Ely 方绍东付金煜付在伟葛良全 R.L.Gi11 M.Gonchar 龚光华宫辉 Y.A.Gornushkin 顾文强关梦云郭新恒 R.W.Hackenburg R.L.Hahn S.Hans 郝慧峰何苗贺青 K.M.heeger 衡月昆 P.Hinrichs Y.K.Hor Y.B.Hsiung B.z.Hu 胡涛黄翰雄 H.z.huang 黄性涛 P.Huber V.Issakov z.Isvan D.E.Jaffe S.Jetter 季筱璐季向盼姜海静焦健斌 R.A.Johnson 康丽 S.H.Kettell M.Kramer 关健强郭文伟郭人能 C.Y.Lai 赖万昌 W.H.Lai K.Lau L.Lebanowski J.Lee 雷瑞霆 R.Leitner 梁干庄梁嘉怡 C.A.Lewis 李飞李高嵩李秋菊李卫东李小波李小男李学潜李仪李志斌梁昊林政儒 C.L.Lin S.K.Lin 林延畅凌家杰 J.M.Link L.Littenberg B.R.Littlejohn D.W.{2. 刘金昌刘江来刘颖彪陆昌国路浩奇陆永康 K.B.Luk 马秋梅马续波马骁妍马宇蒨 K.T.McDonald M.C.McFarlane R.D.McKeown Y.Meng D.Mohapatra Y.Nakajima J.Napolitano D.Naumov I.Nemchenok 倪浩然 W.K.Ngai 聂阳波宁哲 J.P.Ochoa-Ricoux A.Olshevski S.Patton V.Pec J.C.Peng L.E.Piilonen L.Pinsky 潘振声齐法制祁鸣钱鑫 N.Raper 任杰 R.Rosero B.Roskovec 阮锡超邵贝贝师恺 H.Steiner 孙功星孙吉良 N.Tagg 谭耀豪 H.K.Tanaka 唐晓 H.Themann Y.Torun S.Trentalange O.Tsai K.V.Tsang R.H.M.Tsang C.E.Tull Y.C.Tung B.Viren V.Vorobe1 C.H.wang 王灵淑王玲玉王龙泽王萌王乃彦王瑞光 W.wang 王玺王贻芳王喆王铮王志民 D.M.Webber 魏瀚宇魏亚东温良剑 K.Whisnant C.G.White L.Whitehead Y.Williamson T.Wise H.L.H.Wong E.T.Worcester F.F.Wu 吴群习建博夏冬梅邢志忠徐建一徐晶徐吉磊徐晔薛涛杨长根杨雷叶梅 M.Yeh Y.S.Yeh B.L.Young 于泽源占亮 C.zhang 章飞虹张家文张清民张书华张一纯张银鸿张一心张志坚张子平张智勇赵洁赵庆旺赵豫斌郑磊钟玮丽周莉周祖英庄红林邹佳恒 Institute of High Energy Physics Chinese Academy of Sciences university of science and{2. of China university of Wisconsin Brookhaven National Laboratory National United university California Institute of technology Nanjing university Department of Engineering Physics Tsinghua University Chinese university of Hong Kong Shenzhen Univeristy North China Electric Power university Siena college Department of Physics Illinois Institute of Technology Lawrence Berkeley National Laboratory Department of Physics University of California Department of Physics University of Illinois at Urbana-Champaign Chengdu university of technology Joint Institute for Nuclear Research Shanghai Jiao Tong university beijing normal{2. Joseph henry Laboratories Princeton University Center for Neutrino Physics Virginia Tech Department of Physics National Taiwan University Institute of Physics National Chiao-Tung University China Institute of Atomic Energy university of California Shandong university School of Physics Nankai University university of Cincinnati dongguan university of {2. Department of Physics The University of Hong Kong Department of Physics University of Houston Charles university Faculty of Mathematics and Physics Sun Yat-Sen(Zhongshan)university college of William and Mary Rensselaer Polytechnic Institute China Guangdong Nuclear Power Group Iowa State university Xi'an Jiaotong university

We report an improved measurement of the neutrino mixing angle θ13 from the Daya Bay Reactor Neutrino Experiment. We exclude a zero value for sin2.0}3 with a significance of 7.7 standard deviations. Electron antineutrinos from six reactors of 2.9 GWm th were detected in six antineutrino detectors deployed in two near （flux-weighted baselines of 470 m and 576 m） and one far （1648 m） underground experimental halls. Using 139 days of data, 2.909 （2.5308） electron antineutrino candidates were detected at the far hall （near halls）. The ratio of the observed to the expected number of antineutrinos assuming no oscillations at the far hall is 0.944± 0.007（stat.） ± 0.003（syst.）. An analysis of the relative rates in six detectors finds sin2.0}3=0.089± 0.010（stat.）±0.005（syst.） in a three-neutrino framework.

关键词： neutrino oscillation neutrino mixing reactor Daya Bay

Observation of e^(+)e^(-)→pppñπ-+c.c.

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Chinese Physics C 2023年第4期47卷 16-25页

作者：麦迪娜 M.N.Achasov P.Adlarson M.Albrecht R.Aliberti A.Amoroso 安美儒安琪白旭红白羽 O.Bakina R.Baldini Ferroli I.Balossino 班勇 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 蔡浩蔡啸 A.Calcaterra 曹国富曹宁 S.A.Cetin 常劲帆常万玲 G.Chelkov 陈琛陈超陈刚陈和生陈玛丽陈申见陈少敏 T.Chen 陈旭荣 X.T.Chen 陈元柏陈卓俊成伟帅初晓 G.Cibinetto F.Cossio 崔佳佳代洪亮代建平 A.Dbeyssi R.E.de Boer D.Dedovich 邓子艳 A.Denig I.Denysenko M.Destefanis F.De Mori 丁勇董静董燎原董明义董翔杜书先 P.Egorov 范玉兰方建房双世方文兴方易 R.Farinelli L.Fava F.Feldbauer G.Felici 封常青冯俊华 K Fischer M.Fritsch C.Fritzsch 傅成栋高涵高原宁高扬 S.Garbolino I.Garzia 葛潘婷葛振武耿聪 E.M.Gersabeck A Gilman K.Goetzen 龚丽龚文煊 W.Gradl M.Greco 谷立民顾旻皓顾运厅关春懿郭爱强郭立波郭如盼郭玉萍 A.Guskov 韩婷婷韩文颖郝喜庆 F.A.Harris 何凯凯何康林 F.H.heinsius C.H.heinz 衡月昆 C.herold M.Himmelreich 侯国一侯颖锐侯治龙胡海明 J.F.Hu 胡涛胡誉黄光顺黄凯旋黄麟钦黄麟钦黄性涛黄燕萍黄震 T.Hussain N Hüsken W.Imoehl M.Irshad J.Jackson S.Jaeger S.Janchiv 纪全姬清平季晓斌季筱璐吉钰瑶贾泽坤姜侯兵姜赛赛江晓山 Y.Jiang 焦健斌焦铮金山金毅荆茂强 T.Johansson N.Kalantar-Nayestanaki 康晓珅 R.Kappert 柯百谦 I.K.Keshk A.Khoukaz P.Kiese R.Kiuchi R.Kliemt L.Koch O.B.Kolcu B.Kopf M.Kuemmel M.Kuessner A.Kupsc W.Kühn J.J.Lane J.S.Lange P.Larin A.Lavania L.Lavezzi 雷祚弘 H.Leithoff M.Lellmann T.Lenz 李翠李聪李春花李澄李德民李飞李刚李慧李贺李海波李惠静 H.N.Li J.Q.Li 李静舒李井文李科 L.J.Li 李龙科李蕾李明浩李培荣李素娴栗帅迎李腾李卫东李卫国李旭红李晓玲李晓宇梁昊梁浩梁浩梁勇飞梁羽铁廖广睿廖龙洲 J.Libby A.Limphirat 林创新林德旭 T.Lin 刘北江刘春秀 D.liu 刘福虎刘芳刘峰 G.M.liu H.liu, 刘宏邦刘怀民刘欢欢刘汇慧刘建北刘佳俊刘晶译刘凯刘魁勇刘珂刘亮刘露刘美宏刘佩莲刘倩刘树彬刘桐刘维克刘卫民刘翔刘英刘玉斌刘振安刘智青娄辛丑卢飞翔吕海江吕军光陆小玲卢宇卢云鹏 Z.H.Lu 罗成林罗民兴罗涛罗小兰吕晓睿吕翌丰马凤才马海龙马连良马明明马秋梅马润秋马瑞廷马骁妍马尧 F.E.Maas M.Maggiora S.Maldaner S.Malde Q.A.Malik A.Mangoni 冒亚军毛泽普 S.Marcello 孟召霞 J.G.Messchendorp G.Mezzadri H.Miao 闵天觉 R.E.Mitchell 莫晓虎 N.Yu.Muchnoi Y.Nefedov F.Nerling I.B.Nikolaev 宁哲 S.Nisar 牛艳 S.L.Olsen 欧阳群 S.Pacetti 潘祥潘越 A.Pathak M.Pelizaeus 彭海平 K.Peters 平加伦平荣刚 S.Plura S.Pogodin V.Prasad 齐法制齐航漆红荣祁鸣齐天钰钱森钱文斌钱圳乔从丰秦佳佳秦丽清覃潇平秦小帅秦中华邱进发屈三强 K.H.Rashid C.F.Redmer 任旷洁 A.Rivetti V.Rodin M.Rolo 荣刚 Ch.Ros 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 Central South university Changsha 410083China 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 Guangxi university Nanning 530004China Hangzhou normal university Hangzhou 310036China hebei university Baoding 071002China helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany henan normal university Xinxiang 453007China henan university of science and{2. 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 INFN Sezione di Ferrara I-44122FerraraItaly university of Ferrara I-44122FerraraItaly Institute of Modern Physics Lanzhou 730000China B Ulaanbaatar 13330Mongolia Jilin 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 16D-35392 GiessenGermany Lanzhou university Lanzhou 730000China Liaoning normal Unive

Using data taken at 2. center-of-mass energies between 4.16 and 4.70 GeV with the BESⅢdetector at the beijing Electron Positron Collider corresponding to a total integrated luminosity of approximately 18.8 fb^(-1),the process e^(+)e^(-)→pppñπ+*** observed for the first time with a statistical significance of 11.5σ.The average Born cross sections in the energy ranges of(4.160,4.380)GeV,(4.400,4.600)GeV and(4.610,4.700)GeV are measured to be(2..5±5.7±1.2.fb,(46.3±10.6±2.5)fb and(59.0±9.4±3.2.fb,respectively,where the first uncertainties are statistical and the second are *** line shapes of the pñ and ppπ^(-)invariant mass spectra are consistent with phase space distributions,indicating that no hexaquark or di-baryon state is observed.

关键词： Multi-baryon channel hexaquark di-baryon states cross section measurement

JUNO sensitivity on proton decay p→νK^(+)searches

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Chinese Physics C 2023年第11期47卷 7-22页

作者： Angel Abusleme Thomas Adam Shakeel Ahmad Rizwan Ahmed Sebastiano Aiello Muhammad Akram 安丰鹏安琪 Giuseppe Andronico Nikolay Anfimov Vito Antonelli Tatiana Antoshkina Burin Asavapibhop João Pedro Athayde Marcondes de André Didier Auguste Nikita Balashov Wander Baldini Andrea Barresi Davide Basilico Eric Baussan Marco Bellato Antonio Bergnoli Thilo Birkenfeld Sylvie Blin David Blum Simon Blyth Anastasia Bolshakova Mathieu Bongrand Clément Bordereau Dominique Breton Augusto Brigatti Riccardo Brugnera Riccardo Bruno Antonio Budano Mario Buscemi Jose Busto Ilya Butorov Anatael Cabrera Barbara Caccianiga 蔡浩蔡啸蔡严克蔡志岩 Riccardo Callegari Antonio Cammi Agustin Campeny 曹传亚曹国富曹俊 Rossella Caruso Cédric Cerna 常劲帆 Yun chang 陈平平 Po-An Chen 陈少敏陈旭荣 Yi-Wen Chen 陈义学陈羽陈长程捷程雅苹 Alexey Chetverikov Davide Chiesa Pietro Chimenti Artem Chukanov Gérard Claverie Catia Clementi Barbara Clerbaux Selma Conforti Di Lorenzo Daniele Corti Flavio Dal Corso Olivia Dalager Christophe De La Taille 邓智邓子艳 Wilfried Depnering Marco Diaz Xuefeng Ding 丁雅韵 Bayu Dirgantara Sergey Dmitrievsky Tadeas Dohnal Dmitry Dolzhikov Georgy Donchenko 董建蒙 Evgeny Doroshkevich Marcos Dracos Frédéric Druillole 杜然杜书先 Stefano Dusini Martin Dvorak Timo Enqvist heike Enzmann Andrea Fabbri Ulrike Fahrendholz 范东华樊磊方建方文兴 Marco Fargetta Dmitry Fedoseev Li-Cheng Feng 冯启春 Richard Ford Amélie Fournier 甘浩男 Feng Gao Alberto Garfagnini Arsenii Gavrikov Marco Giammarchi Agnese Giaz Nunzio Giudice Maxim Gonchar 龚光华宫辉 Yuri Gornushkin Alexandre Göttel Marco Grassi Christian Grewing Vasily Gromov 顾旻皓谷肖飞古宇关梦云 Nunzio Guardone Maria Gul 郭聪郭竞渊郭万磊郭新恒郭宇航 Paul Hackspacher Caren Hagner 韩然 Yang Han Muhammad Sohaib Hassan 何苗何伟 Tobias heinz Patrick hellmuth 衡月昆 Rafael herrera 贺远强侯少静 Yee Hsiung Bei-Zhen Hu 胡航胡健润胡俊胡守扬胡涛胡宇翔胡焯钧黄春豪黄桂鸿黄翰雄黄文昊黄鑫黄性涛黄永波惠加琪霍雷霍文驹 Cédric Huss Safeer Hussain Ara Ioannisian Roberto Isocrate Beatrice Jelmini Kuo-Lun Jen Ignacio Jeria 季筱璐吉星曌贾慧慧贾俊基蹇司玉蒋荻蒋炜江晓山金如意荆小平 Cécile Jollet Jari Joutsenvaara Sirichok Jungthawan Leonidas Kalousis Philipp Ka Pontificia Universidad Católica de Chile SantiagoChile IPHC Universitéde StrasbourgCNRS/IN2P3F-67037 StrasbourgFrance Pakistan Institute of Nuclear science and technology IslamabadPakistan INFN Catania and Dipartimento di Fisica e Astronomia dell Universitàdi Catania CataniaItaly East China university of science and{2. ShanghaiChina university of science and{2. of China HefeiChina Joint Institute for Nuclear Research DubnaRussia INFN Sezione di Milano and Dipartimento di Fisica dell Universitàdi Milano MilanoItaly Department of Physics Faculty of ScienceChulalongkorn UniversityBangkokThailand IJCLab UniversitéParis-SaclayCNRS/IN2P391405 OrsayFrance Department of Physics and Earth science University of Ferrara and INFN Sezione di FerraraFerraraItaly INFN Milano Bicocca and university of Milano Bicocca MilanoItaly INFN Sezione di Padova PadovaItaly III.Physikalisches Institut B RWTH Aachen UniversityAachenGermany Eberhard Karls Universität Tübingen Physikalisches InstitutTübingenGermany Institute of High Energy Physics BeijingChina SUBATECH Universitéde NantesIMT AtlantiqueCNRS-IN2P3NantesFrance Univ.Bordeaux CNRSLP2IUMR 5797F-33170 GradignanFrance Department of Physics National Taiwan UniversityTaipei Dipartimento di Fisica e Astronomia dell’Universitàdi Padova and INFN Sezione di Padova PadovaItaly university of Roma Tre and INFN Sezione Roma Tre RomaItaly Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance Wuhan university WuhanChina INFN Milano Bicocca and Politecnico of Milano MilanoItaly National United university Miao-Li dongguan university of {2. DongguanChina Tsinghua university BeijingChina Institute of Modern Physics Chinese Academy of SciencesLanzhouChina Institute of Physics National Yang Ming Chiao Tung UniversityHsinchu North China Electric Power university BeijingChina Sun Yat-Sen university GuangzhouChina beijing Institute of Spacecraft Environment Engineering BeijingChina Universidade Estadual de Londrina LondrinaBrazil INFN Sez

The Jiangmen Underground Neutrino Observatory(JUNO)is a large liquid scintillator detector designed to explore many topics in fundamental *** this study,the potential of searching for proton decay in the p→νK^(+)mode with JUNO is *** kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for ***,the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed *** on these advantages,the detection efficiency for the proton decay via p→νK^(+)is 36.9%±4.9%with a background level of 0.2.0.05(syst)±0.2.stat)events after 10 years of data *** estimated sensitivity based on 2.0 kton-years of exposure is 9.6×1033 years,which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies.

关键词： proton decay grand unified theories JUNO liquid scintillator detector

Measurement of the integrated luminosity of the Phase 2.data of the Belle Ⅱ experiment

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Chinese Physics C 2020年第2期44卷 1-12页

作者： F.Abudinén I.Adachi P.Ahlburg H.Aihara N.Akopov A.Aloisio F.Ameli L.Andricek N.Anh Ky D.M.Asner H.Atmacan T.Aushev V.Aushev T.Aziz K.Azmi V.Babu S.Baehr S.Bahinipati A.M.Bakich P.Bambade Sw.Banerjee S.Bansal V.Bansal M.Barrett J.Baudot A.Beaulieu J.Becker P.K.Behera J.V.Bennett E.Bernieri F.U.Bernlochner M.Bertemes M.Bessner S.Bettarini V.Bhardwaj F.Bianchi T.Bilka S.Bilokin D.Biswas G.Bonvicini A.Bozek M.Bračko P.Branchini N.Braun T.E.Browder A.Budano S.Bussino M.Campajola L.Cao G.Casarosa C.Cecchi D.Červenkov M.-C.chang P.chang R.Cheaib V.Chekelian Y.Q.Chen Y.-T.Chen B.G.Cheon K.Chilikin H.-E.Cho K.Cho S.Cho S.-K.Choi S.Choudhury D.Cinabro L.Corona L.M.Cremaldi S.Cunliffe T.Czank F.Dattola E.De La Cruz-Burelo G.De Nardo M.De Nuccio G.De Pietro R.de Sangro M.Destefanis S.Dey A.De Yta-hernandez F.Di Capua S.Di Carlo J.Dingfelder Z.Doležal I.Domínguez Jiménez T.V.{2. K.Dort S.Dubey S.Duell S.Eidelman M.Eliachevitch T.Ferber D.Ferlewicz G.Finocchiaro S.Fiore A.Fodor F.Forti A.Frey B.G.Fulsom M.Gabriel E.Ganiev M.Garcia-hernandez R.Garg A.Garmash V.Gaur A.Gaz U.Gebauer A.Gellrich J.Gemmler T.Geßler R.Giordano A.Giri B.Gobbo R.Godang P.Goldenzweig B.Golob P.Gomis P.Grace W.Gradl E.Graziani D.Greenwald C.Hadjivasiliou S.Halder K.Hara T.Hara O.Hartbrich K.Hayasaka H.Hayashii C.hearty M.T.hedges I.heredia de la Cruz M.hernández Villanueva A.hershenhorn T.Higuchi E.C.Hill H.Hirata M.Hoek S.Hollitt T.Hotta C.-L.Hsu Y.Hu K.huang T.Iijima K.Inami G.Inguglia J.Irakkathil Jabbar A.Ishikawa R.Itoh M.Iwasaki Y.Iwasaki S.Iwata P.Jackson W.W.Jacobs D.E.Jaffe E.-J.Jang H.B.Jeon S.Jia Y.Jin C.Joo J.Kahn H.Kakuno A.B.Kaliyar G.Karyan Y.Kato T.Kawasaki H.Kichimi C.Kiesling B.H.Kim C.-H.Kim D.Y.Kim S.-H.Kim Y.K.Kim Y.Kim T.D.Kimmel K.Kinoshita C.Kleinwort B.Knysh P.Kodyš T.Koga I.Komarov T.Konno S.Korpar D.Kotchetkov N.Kovalchuk T.M.G.Kraetzschmar P.Križan R.Kroeger J.F.Krohn P.Krokovny W.Kuehn T.Kuhr M.Kumar R.Kumar K.Kumara S.Kurz A.Kuzmin Y.-J.Kwon S.Lacaprara Y.-T.Lai C.La Licata K.Lalwani L.Lanceri J.S.Lange K.Lautenbach I.-S.Le Beihang university Beijing 100191 Brookhaven National Laboratory UptonNew York 11973 Budker Institute of Nuclear Physics SB RAS Novosibirsk 630090 Centro de Investigacion y de Estudios Avanzados del Instituto Politecnico Nacional Mexico City 07360 Faculty of Mathematics and Physics Charles University12116 Prague Chiba university Chiba 263-8522 Consejo Nacional de Ciencia y Tecnología Mexico City 03940 Deutsches Elektronen–Synchrotron 22607 Hamburg Duke university DurhamNorth Carolina 27708 Earthquake Research Institute University of TokyoTokyo 113-0032 Forschungszentrum Jülich 52425 Jülich Department of Physics Fu Jen Catholic UniversityTaipei 24205 Key Laboratory of Nuclear Physics and Ion-beam Application(MOE)and Institute of Modern Physics Fudan UniversityShanghai 200443 II.Physikalisches Institut Georg-August-Universität Göttingen37073 Göttingen Gifu university Gifu 501-1193 The Graduate university for Advanced Studies(SOKENDAI) Hayama 240-0193 Gyeongsang National university Jinju 52828 Department of Physics and Institute of Natural sciences Hanyang UniversitySeoul 04763 High Energy Accelerator Research Organization(KEK) Tsukuba 305-0801 J-PARC Branch KEK Theory CenterHigh Energy Accelerator Research Organization(KEK)Tsukuba 305-0801 Indian Institute of science Education and Research Mohali SAS Nagar140306 Indian Institute of technology Bhubaneswar Satya Nagar 751007 Indian Institute of technology Hyderabad Telangana 502285 Indian Institute of technology Madras Chennai 600036 Indiana university BloomingtonIndiana 47408 Institute for High Energy Physics Protvino 142281 Institute of High Energy Physics Vienna 1050 Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049 Institute of Particle Physics(Canada) VictoriaBritish Columbia V8W 2Y2 Institute of Physics Hanoi Instituto de Fisica Corpuscular Paterna 46980 INFN Laboratori Nazionali di Frascati I-00044 Frascati INFN Sezione di Napoli I-80126 Napoli INFN Sezione di Padova I-35131 Padova INFN Sezione di Perugia I-06123 Perugia

From April to July 2.18,a data sample at the peak energy of the T(4 S) resonance was collected with the Belle Ⅱ detector at the SuperKEKB electron-positron *** is the first data sample of the Belle Ⅱ *** Bhabha and digamma events,we measure the integrated luminosity of the data sample to be(496.3±0.3±3.0) pb-1,where the first uncertainty is statistical and the second is *** work provides a basis for future luminosity measurements at Belle Ⅱ.

关键词： luminosity Bhabha digamma Belle II