Chinese Physics C > 1996, Vol. 20 > Issue(7): 577-587

Study of Particle Identification Using dE/dxin the BES Large Cylindrical Drift Chamber

Institute of High Energy of Physics, The Chinese Academy of Sciences, Beijing 100039

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Abstract：
The method for particle identification using d E/d xin the BES large cylindrical drift chamber has been briefly described. The performance of the particle identification using dE/dx has been given. After applying systematic effect corrections and absolute energy calibration to the d E/d xraw data, the d E/d xenergy rssolution of 7.5% has been obtained for minimum ionization particles (0.4-0.5GeV /c π) in a case corresponding to more than 30 d E/d xsamples per track.This results in 3σK/π separation for momentum up to 0.65GeV / cand 3σe /π separation in a momentum range of 0.2≤ p≤4GeV/ c.

References

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丁慧良等，高能物理与核物理，16（1992）769.[2]马基茂等，高能物理与核物理，9（1990）777[3]R.M.sternheimer,R.F.Peierls,Phys Rev.,（1971）3681.[4]荣刚，北京谱仪主漂移室dE/dx系统效应的软件修正，第四次全国高能实验物理学术会议，北京，1991.10;北京谱仪主漂移室dE/dx系统效应软件修正方法的研究与应用，内部报告，高能物理研究所，1992,11.[5]荣刚，核电子学与探测技术，12增刊（1992）200.[6]荣刚、马基茂、毛慧顺等，高能物理与核物理，17（1993）866.[7]荣刚，北京谱仪dE/dx粒子识别的软件方法，第四次全国高能实验物理学术会议，北京，1991.10.

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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 Zhendong. Study of Particle Identification Using d E/d xin the BES Large Cylindrical Drift Chamber[J]. Chinese Physics C, 1996, 20(7): 577-587.

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Received: 1900-01-01
Revised: 1900-01-01

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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/dxin the BES Large Cylindrical Drift Chamber

Corresponding author:Rong Gang,

Institute of High Energy of Physics, The Chinese Academy of Sciences, Beijing 100039

Received Date:1900-01-01
Accepted Date:1900-01-01
Available Online:1996-07-05

Abstract:The method for particle identification using dE/dxin the BES large cylindrical drift chamber has been briefly described. The performance of the particle identification using dE/dx has been given. After applying systematic effect corrections and absolute energy calibration to the dE/dxraw data, the dE/dxenergy rssolution of 7.5% has been obtained for minimum ionization particles (0.4-0.5GeV /c π) in a case corresponding to more than 30 dE/dxsamples per track.This results in 3σK/π separation for momentum up to 0.65GeV /cand 3σe /π separation in a momentum range of 0.2≤p≤4GeV/c.