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Studies of dE/dx measurements with the BESⅢ
作者姓名:曹学香  李卫东  Roy A. Briere  刘春雷  毛泽普  陈申见  邓子艳  何康林  黄性涛  黄彬  黄艳萍  贾卢魁  季晓斌  李秀荣  刘春燕  刘怀民  马秋梅  马想  邱进发  王大勇  伍灵慧  吴智  袁野  张学尧  赵川  张瑶  邹佳恒
作者单位:Institute of High Energy Physics, CAS, Beijing 100049, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China; Carnegie Mellon University, Pittsburgh, PA 15213, USA; Nanjing University, Nanjing 210093, China; Shandong University, Jinan 250100, China; Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
基金项目:Supported by National Natural Science Foundation of China (10821063, 10875141, 10705034, 10605030), Ministry of Science and Technology of China (2009CB825200), Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program (KJCX2- YW-N29, KJCX2-YW-N45) and United States Department of Energy (DE-FG02-91ER40682)
摘    要:The Beijing Spectrometer Ⅲ(BESⅢ)is a general-purpose detector used for the study of τ-charm physics at the Beijing Electron-Positron Collider Ⅱ(BEPC Ⅱ).This paper presents our studies of the dE/dx measurement in the drift chamber of BESⅢ,which is important for the identification of charged particles.Corrections applied to the dE/dx measurement in data reconstruction are discussed.After our current dE/dx calibration,a resolution of about 6% has been obtained for minimum ionization particles,and a 3σ K/πseparation is obtained for momenta up to 760 MeV/c.These results meet the design goals of the BESⅢ drift chamber.

关 键 词:北京谱仪  北京正负电子对撞机  测量  撤销  带电粒子  数据重建  设计目标  漂移室
收稿时间:2010-03-03
修稿时间:2010-04-12
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