Study of Particle Identification Using d<i>E</i>/d<i>x</i> Measurement in the BES Large Cylindrical Drift Chamber

Rong Gang; Ma Jimao; Mao Huishun; Bai Jingzhi; Xie Peipei; Yan Jie; Wang Yunyong; Mao Zepu; Liu Rongguang; Sun Shijun; Li Weiguo; Song Xiaofei; Wu Zhengdong

Chinese Physics C> 1996, Vol. 20> Issue(S3) : 213-224

Study of Particle Identification Using dE/dx Measurement in the BES Large Cylindrical Drift Chamber

Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China

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Abstract：
The method for particle identiHcation using dE/dx information from the BES large cylindrical drift chamber is briefly described. The performance of the particle identiHcation using dE/dx is given. After applying systematic effect corrections and absolute energy calibration to the dE/dx raw data, the dE/dx resolution of 7.5% is obtained for minimum-ionizing particles (0.4-0.5GeV/c 7π) with more than 30 dE/dx samples per track. This results in 3σK/π separation for momentum up to 0.65GeV/c and 3σe/π separation in a momentum range of 0.2 ≤ p ≤ 4GeV/c.
- Beijing spectrometer ,
- drift chamber ,
- ionization loss ,
- dE/dx resolution ,
- energy calibration ,
- dE/dx systematic effects ,
- Landau formula ,
- particle identification

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Rong Gang, Ma Jimao, Mao Huishun, Bai Jingzhi, Xie Peipei, Yan Jie, Wang Yunyong, Mao Zepu, Liu Rongguang, Sun Shijun, Li Weiguo, Song Xiaofei and Wu Zhengdong. Study of Particle Identification Using dE/dx Measurement in the BES Large Cylindrical Drift Chamber[J]. Chinese Physics C, 1996, 20(S3): 213-224.

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Received: 1995-11-21

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沈阳化工大学材料科学与工程学院沈阳 110142

Study of Particle Identification Using dE/dx Measurement in the BES Large Cylindrical Drift Chamber

Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China

Received Date: 1995-11-21

Abstract: The method for particle identiHcation using dE/dx information from the BES large cylindrical drift chamber is briefly described. The performance of the particle identiHcation using dE/dx is given. After applying systematic effect corrections and absolute energy calibration to the dE/dx raw data, the dE/dx resolution of 7.5% is obtained for minimum-ionizing particles (0.4-0.5GeV/c 7π) with more than 30 dE/dx samples per track. This results in 3σK/π separation for momentum up to 0.65GeV/c and 3σe/π separation in a momentum range of 0.2 ≤ p ≤ 4GeV/c.