Studies of dE/dx measurements with the BESⅢ  

作　　者：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 

机构地区：[1]Institute of High Energy Physics, CAS [2]Graduate University of Chinese Academy of Sciences [3]Carnegie Mellon University [4]Nanjing University [5]Shandong University [6]Department of Modern Physics, University of Science and Technology of China

出　　处：《Chinese Physics C》2010年第12期1852-1859,共8页中国物理C（英文版）

基　　金：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);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.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：BESIII drift chamber energy loss dE/dx CALIBRATION particle identification 

分 类 号：O572.212[理学—粒子物理与原子核物理]