| Studies of dE/dx measurements with the BESⅢ |
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| 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 |
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| 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 |
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| 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） |
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| 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.
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| 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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