Systematic Study of Time of Flight Correction of BESⅡ

SUN Sheng-Sen; HE Kang-Lin; YANG Fan; ZHENG Zhi-Peng

Chinese Physics C> 2005, Vol. 29> Issue(2) : 162-167

Systematic Study of Time of Flight Correction of BESⅡ

Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China2 Institute of High Energy Physics,Cas,Beijing 100049,China3 Nankai University,Tianjin 300071,China

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Abstract：
Time of flight counter (tof) is one of the main subdetectors of beijing spectrometerⅡ(besⅡ)for the identification of charged particles. due to the importance of particle identification in physics analysis,the measured time offset and resolution are carefully studied in this paper. using the hadron sample of j/ψ data,the variations of time offset and resolution versus pulse amplitued Q,coordinate z and βγ value are analyzed in detail. the correction functions of time offset and resolution are constructed respectively. finally,the results are checked from the hadron sample of ψ″ data when using the correction function.

References

[1]

. 　DING Hui-Liang et al (BES Collab. ) . HEP NP ,1992 ,16 :769 (inChinese)(丁慧良等(北京谱仪合作组) . 高能物理与核物理,1992 , 16 :769)2.　BAI Jing-Zhi et al (BES Collab. ) . BES Upgrade. Nucl . Instrum.Methods ,2001 ,A458 :6273.　ZHENG Zhi-Peng , ZHU Yong-Sheng. Physics in Collision at Beijing Spectrometer. Nanning : Science and Technique Publisher of Guangxi ,1998. 40 (in Chinese)(郑志鹏,朱永生. 北京谱仪正负电子物理. 南宁:广西科学技术出版社,1998. 40)4.　RONG Gang et al . HEP NP ,2001 ,25 :154 (in Chinese)(荣刚等. 高能物理与核物理,2001 ,25 :154)5.　ZHU Yong-Sheng et al . Probability and Statistics in Experimental Physics. Beijing :Science Publisher ,1991 (in Chinese)(朱永生等. 实验物理中的概率与统计. 北京: 科学出版社,1991)6.　Birks J B. Phys. Rev. ,1951 ,84 :3647.　Particle Data Group. Rhys. Rev. ,2002 ,D66 :1958.　Blum W. Particle Detection with Drift Chambers. New York :Springer-Verlag. 258

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SUN Sheng-Sen, HE Kang-Lin, YANG Fan and ZHENG Zhi-Peng. Systematic Study of Time of Flight Correction of BESⅡ[J]. Chinese Physics C, 2005, 29(2): 162-167.

SUN Sheng-Sen, HE Kang-Lin, YANG Fan and ZHENG Zhi-Peng. Systematic Study of Time of Flight Correction of BESⅡ[J]. Chinese Physics C, 2005, 29(2): 162-167. shu

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Received: 2004-05-11
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

Systematic Study of Time of Flight Correction of BESⅡ

Corresponding author: SUN Sheng-Sen,

Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China2 Institute of High Energy Physics,Cas,Beijing 100049,China3 Nankai University,Tianjin 300071,China

Received Date: 2004-05-11
Accepted Date: 1900-01-01
Available Online: 2005-02-05

Abstract: Time of flight counter (tof) is one of the main subdetectors of beijing spectrometerⅡ(besⅡ)for the identification of charged particles. due to the importance of particle identification in physics analysis,the measured time offset and resolution are carefully studied in this paper. using the hadron sample of j/ψ data,the variations of time offset and resolution versus pulse amplitued Q,coordinate z and βγ value are analyzed in detail. the correction functions of time offset and resolution are constructed respectively. finally,the results are checked from the hadron sample of ψ″ data when using the correction function.