Muon Identification Using the Efficiencies Ratio Method at BESⅡ

GUO Yun-Jun; HE Kang-Lin

Chinese Physics C> 2007, Vol. 31> Issue(11) : 1050-1055

Muon Identification Using the Efficiencies Ratio Method at BESⅡ

GUO Yun-Jun ,
HE Kang-Lin ^,

Nanjing University, Nanjing 210093, China2 Institute of High Energy Physics, CAS, Beijing 100049, China

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Abstract：
The momentum and polar angle depended position resolution and hit efficiency in each layer of BES(Ⅱ) muon detector are calibrated by using cosmic ray and hadron samples. Based on the calibration results, the efficiencies ratio function is constructed to separate μ/π effectively and applied in physics analysis.

References

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. BAI J Z et al. (BES Collaboration). Nucl. Instrum. Methods,1994, A344: 3192. BAI J Z et al. (BES Collaboration). Nucl. Instrum. Methods,2001, A458: 6273. GU Jian-Hui, YU Zhong-Qiang, HEP NP, 1996, 20(1):26-31(in Chinese)(顾建辉, 郁忠强. 高能物理与核物理, 1996, 20(1): 26-31)4. YAO W M et al. Journal of Physics, 2006, G33: 15. BAI J Z et al. (BES Collaboration). Phys. Rev. Lett., 1995,74: 45996. BAI J Z et al. (BES Collaboration). Phys. Lett., 1998.B429: 1887. BES0 Design Report. Interior Document in Institute ofHigh Energy Physics, 20048. QIN Gang, L Jun-Guang, HE Kang-Lin et al. ParticleIdenti cation Using Arti cial Neural Networks at BES0.Chinese Physics C, 2008, 1, to be published9. Roe B P, YANG H J et al. Nucl. Instrum. Methods, 2005,A543: 577-584

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GUO Yun-Jun and HE Kang-Lin. Muon Identification Using the Efficiencies Ratio Method at BESⅡ[J]. Chinese Physics C, 2007, 31(11): 1050-1055.

GUO Yun-Jun and HE Kang-Lin. Muon Identification Using the Efficiencies Ratio Method at BESⅡ[J]. Chinese Physics C, 2007, 31(11): 1050-1055. shu

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Received: 2007-02-12
Revised: 2007-03-07

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Muon Identification Using the Efficiencies Ratio Method at BESⅡ

GUO Yun-Jun
HE Kang-Lin ^,

Corresponding author: HE Kang-Lin,

Nanjing University, Nanjing 210093, China2 Institute of High Energy Physics, CAS, Beijing 100049, China

Received Date: 2007-02-12
Accepted Date: 2007-03-07
Available Online: 2007-11-05

Abstract: The momentum and polar angle depended position resolution and hit efficiency in each layer of BES(Ⅱ) muon detector are calibrated by using cosmic ray and hadron samples. Based on the calibration results, the efficiencies ratio function is constructed to separate μ/π effectively and applied in physics analysis.