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Online monitoring of the center-of-mass energy from real data at BESⅢ

Radiation Detection Technology and Methods 2020年第3期4卷 337-344页

作者： Jiada Lu Yanjia Xiao Xiaobin Ji Institute of High energy Physics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Background Data Quality Monitoring system(DQM)was developed to monitor data quality at BESⅢexperiment in real *** stable center-of-mass energy(E_(cms))is essential for the data *** monitoring the E_(cms)can help find the beam energy shift in *** The purpose is to monitor the E_(cms)in DQM system in real *** The E_(cms)is measured using Bhabha scattering process in DQM system,due to its large cross section and low background *** E_(cms)is calculated from the invariant mass of e^(+)e^(-),and the correction value from radiation effect and momentum *** The E_(cms)calculated with DQM system shows a good consistency with that from offline reconstruction within *** results are validated with data taken in *** overall systematic uncertainty includes 0.39 MeV/c^(2) from signal extraction and 2.54 MeV/c^(2) from calibration and radiation *** The E_(cms)calculated from Bhabha scattering process is now available on DQM system in real time,which can be used as references for researchers to operate BESⅢexperiment.

关键词： DQM center-of-mass energy Bhabha process

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Luminosities and energies of e^(+)e^(−) collision data taken between √s=4.61 GeV and 4.95 GeV at BESⅢ

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Chinese Physics C 2022年第11期46卷 64-75页

作者： M.Ablikim M.N.Achasov P.Adlarson M.Albrecht R.Aliberti A.Amoroso M.R.An Q.An X.H.Bai 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 Fischer M.Fritsch C.Fritzsch C.D.Fu H.Gao Y.N.Gao Yang Gao S.Garbolino I.Garzia P.T.Ge C.Geng 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.Kang R.Kappert M.Kavatsyuk B.C.Ke 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.Kuhn J.J.Lane 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.Li H.N.Li J.Q.Li J.S.Li J.W.Li Ke Li L.J Li 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.Libby A.Limphirat C.X.Lin D.X.Lin T.Lin B.J.Liu 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 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 16

From December 2019 to June 2021,the BESⅢ experiment collected approximately 5.85 fb^(−1) of data at center-of-mass energies between 4.61 and 4.95 *** is the highest collision energy BEPCⅡ has reached to *** accumulated e^(+)e^(−) annihilation data samples are useful for studying charmonium(-like)states and charmed-hadron *** adopting a novel method of analyzing the production of A_(c)^(+)A_(c)^(-) pairs in e^(+)e^(−) annihilation,the center-of-mass energies are measured with a precision of 0.6 *** luminosities are measured with a precision of better than 1% by analyzing the events of large-angle Bhabha *** measurements provide important inputs to analyses based on these data samples.

关键词： luminosity center-of-mass energy BESⅢdetector

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Acceleration of particles in Einstein-Maxwell-dilaton black holes

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Chinese Physics C 2017年第6期41卷 103-109页

作者：毛普健李然贾林玉任继荣 Institute of High energy Physics and Theoretical Physics center for Science Facilities Chinese Academy of Sciences Institute of Theoretical Physics Lanzhou University Department of Physics Henan Normal University

It has recently been pointed out that, under certain conditions, the energy of particles accelerated by black holes in the center-of-mass frame can become arbitrarily high. In this paper, we study the collision of two particles in the case of four-dimensional charged nonrotating, extremal charged rotating and near-extremal charged rotating Kaluza-Klein black holes as well as the naked singularity case in Einstein-Maxwell-dilaton theory. We find that the center-of-mass energy for a pair of colliding particles is unlimited at the horizon of charged nonrotating Kaluza-Klein black holes, extremal charged rotating Kaluza-Klein black holes and in the naked singularity case.

关键词： black hole particles accelerator center-of-mass energy

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Measurements of the center-of-mass energies at BESⅢ via the di-muon process

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Chinese Physics C 2016年第6期40卷 1-8页

作者：麦迪娜 M.N.Achasov 艾小聪 O.Albayrak M.Albrecht D.J.Ambrose A.Amoroso 安芬芬安琪白景芝 R.Baldini Ferroli 班勇 D.W.Bennett J.V.Bennett M.Bertani D.Bettoni 边渐鸣 F.Bianchi E.Boger I.Boyko R.A.Briere 蔡浩蔡啸 O.Cakir A.Calcaterra 曹国富 S.A.Cetin 常劲帆 G.Chelkov 陈刚陈和生陈海云陈江川陈玛丽陈申见谌炫陈旭荣陈元柏程和平褚新坤 G.Cibinetto 代洪亮代建平 A.Dbeyssi D.Dedovich 邓子艳 A.Denig I.Denysenko M.Destefanis F.De Mori 丁勇董超董静董燎原董明义杜书先段鹏飞范荆州方建房双世方馨方易 L.Fava F.Feldbauer G.Felici 封常青 E.Fioravanti M.Fritsch 傅成栋高清高鑫磊高旭阳高原宁高榛 I.Garzia K.Goetzen 龚文煊 W.Gradl M.Greco 顾旻皓顾运厅管颖慧郭爱强郭立波郭玥郭玉萍 Z.Haddadi A.Hafner 韩爽郝喜庆 F.A.Harris 何康林 T.Held 衡月昆侯治龙胡琛胡海明胡继峰胡涛胡誉黄光明黄光顺黄金书黄性涛黄勇 T.Hussain 纪全姬清平季晓斌季筱璐姜鲁文江晓山蒋兴雨焦健斌焦铮金大鹏金山 T.Johansson A.Julin N.Kalantar-Nayestanaki 康晓琳康晓珅 M.Kavatsyuk B.C.Ke P.Kiese R.Kliemt B.Kloss O.B.Kolcu B.Kopf M.Kornicer W.Kühn A.Kupsc J.S.Lange M.Lara P.Larin C.Leng 李翠李澄李德民李飞李峰云李刚李海波李家才李瑾李康李科李蕾李培荣李腾李卫东李卫国李晓玲李小梅李小男李学潜李志兵梁昊梁勇飞梁羽铁廖广睿 D.X.Lin(lin) 刘北江刘春秀刘栋刘福虎刘芳刘峰刘宏邦刘欢欢刘汇慧刘怀民刘杰刘建北刘觉平刘晶译刘凯刘魁勇刘兰雕刘佩莲刘倩刘树彬刘翔刘玉斌刘振安刘智清 H.Loehner 娄辛丑吕海江吕军光卢宇卢云鹏罗成林罗民兴 T.Luo 罗小兰吕晓睿马凤才马海龙马连良马秋梅马天马旭宁马骁妍 F.E.Maas M.Maggiora 冒亚军毛泽普 S.Marcello J.G.Messchendorp 闵建 R.E.Mitchell 莫晓虎莫玉俊 C.Morales Morales K.Moriya N.Yu.Muchnoi H.Muramatsu Y.Nefedov F.Nerling I.B.Nikolaev 宁哲 S.Nisar 牛顺利牛讯伊馬鵬欧阳群 S.Pacetti 潘越 P.Patteri M.Pelizaeus 彭海平 K.Peters J.Pettersson 平加伦平荣刚 R.Poling V.Prasad 祁鸣钱森乔从丰秦丽清覃拈秦小帅秦中华邱进发 K.H.Rashid C.F.Redmer M.Ripka 荣刚 Ch.Rosner 阮向东 V.Santoro A.Sarantsev M.Savrie K.Schoenning S.Schumann 单葳邵明沈成平沈培迅沈肖雁盛华义宋维民宋欣颖 S.Sosio S.Spataro 孙功星孙俊峰孙胜森孙勇杰孙永昭孙志嘉孙振田唐昌建唐晓 I.Tapan E.H.Thorndike M.Tiemens M.Ullrich I.Uman G.S.Varner 王斌王东王大勇王科王亮亮王灵淑王萌王平王佩良王思广王炜王维平王雄飞王雅迪王贻芳王亚乾王铮王志刚王志宏王至勇 T.Weber 魏代会韦江波 P.Weidenkaff 文硕频 U.Wiedner M.Wolke 伍灵慧吴智夏磊夏力钢夏宇肖栋肖浩肖振军谢宇广修青磊许国发徐雷徐庆君徐新平严亮鄢文标闫文成颜永红杨海军杨洪勋杨柳杨迎杨永栩叶梅叶铭汉殷俊昊俞伯祥喻纯旭俞洁晟苑长征袁文龙袁野 A.Yuncu A.A.Zafar A.Zallo 曾云曾哲张丙新张炳云张弛张长春张达华张宏浩章红宇张佳佳张杰磊张敬庆张家文张建勇张景芝张坤张磊张学尧张瑶张宇宁张银鸿张亚腾张宇张正好张子平张振 Institute of High energy Physics G.I.Budker Institute of Nuclear Physics SB RAS(BINP) the Novosibirsk State University Carnegie Mellon University Bochum Ruhr-University University of Rochester University of Turin INFN University of Science and Technology of China State Key Laboratory of Particle Detection and Electronics INFN Laboratori Nazionali di Frascati Peking University Indiana University INFN Sezione di Ferrara University of Minnesota Joint Institute for Nuclear Research the Moscow Institute of Physics and Technology Wuhan University Istanbul Aydin University Ankara University University of Eastern Piedmont the Functional Electronics Laboratory Tomsk State University Beihang University Nanjing University Lanzhou University Huangshan College Shanghai Jiao Tong University Helmholtz Institute Mainz Johannes Gutenberg University of Mainz Liaoning University Nankai University Zhengzhou University Tsinghua University GSI Helmholtzcentre for Heavy Ion Research GmbH GuangXi University Nanjing Normal University KVI-CART University of Groningen Henan Normal University University of Hawaii Central China Normal University Shandong University University of the Punjab Uppsala University Dogus University Istanbul Arel University Justus Liebig University Giessen Ⅱ.Physikalisches Institut Seoul National University Hangzhou Normal University Beijing Institute of Petrochemical Technology University of Chinese Academy of Sciences Sun Yat-Sen University Sichuan University Guangxi Normal University Shanxi University Henan University of Science and Technology University of Texas at Dallas Zhejiang University COMSATS Institute of Information Technology INFN and University of Perugia the NRC "Kurchatov Institute" PNPI University of Ferrara Uludag University Hunan University University of South China Soochow University China center of Advanced Science and Technology Turkey Bogazici University University of Science and Technology Liaoning

From 2011 to 2014, the BESIII experiment collected about 5 fb^-1 data at center-of-mass energies around 4 GeV for the studies of the charmonium-like and higher excited charmonium states. By analyzing the di-muon process e＋e- →yma/Fsμ^＋μ^-, the center-of-mass energies of the data samples are measured with a precision of 0.8 MeV. The center-of-mass energy is found to be stable for most of the time during data taking.

关键词： center-of-mass energy di-muon process charmoniumlike states

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