Using the Q of TOF to Identify the Particles

LIU Fang; HE Kang-Lin; SUN Sheng-Sen; YANG Fan; ZHENG Zhi-Peng; LI Jin

Chinese Physics C> 2005, Vol. 29> Issue(8) : 781-786

Using the Q of TOF to Identify the Particles

Institute of High Energy Physics, CAS Beijing 100049,China2 Department of Modern Physics, University of Science and Technology of China,Hefei,230026,China

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Abstract：
Time of flight counter (TOF) is one of the main subdetectors of Beijing SpectrometerII (BESII) for identification of charge particles. Time of flight and pulse amplitude are measured from the time of flight counters, when the particle hits on the TOF. Based on Di-mu sample from BESII, the correction of pulse amplitude Q is studied. Using the hadron sample of J/ψ, the relation between the corrected Pulse amplitude and βγ value is analyzed. A conclusion is that it is feasible to use the pulse amplitude Q₀ of TOF to identify the particles. Finally the efficiency and error efficiency is given while the pulse amplitude is used to identify the particles.

References

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. DING Hui-Liang et al (BES Collaboration) . HEP NP ,1992 ,16 :769(in Chinese)(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 Collaboration) . Nucl . Instrun. Methods ,2001 ,A458 :6273. ZHENG Zhi-Peng , ZHU Yong-Sheng. Electron-Antielectron Physics of Beijing Spectrometer. Nanning : Guangxi Technology and Science Press ,1998 (in Chinese) (郑志鹏,朱永生主编. 北京谱仪正负电子物理. 南宁:广西科学技术出版社,1998)4. XIE Yi-Gang et al . Particle Detector and Data Acquisition. Beijing :Science Press ,2003 (in Chinese)(谢一冈等主编. 粒子探测器与数据获取. 北京: 科学出版社,2003)5. Birks J B. Phys. Rev. ,1951 ,84 :3646. TANG Xiao-Wei . Experimental Methods of Particle Physics.Beijing :The Higher Education Press ,1982 (in Chinese)(唐孝威主编. 粒子物理实验方法. 北京:高等教育出版社,1982)7. Particle Data Group. Phys.Lett . ,2004 ,B592 :242

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LIU Fang, HE Kang-Lin, SUN Sheng-Sen, YANG Fan, ZHENG Zhi-Peng and LI Jin. Using the Q of TOF to Identify the Particles[J]. Chinese Physics C, 2005, 29(8): 781-786.

LIU Fang, HE Kang-Lin, SUN Sheng-Sen, YANG Fan, ZHENG Zhi-Peng and LI Jin. Using the Q of TOF to Identify the Particles[J]. Chinese Physics C, 2005, 29(8): 781-786. shu

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Received: 2004-12-06
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

Using the Q of TOF to Identify the Particles

Corresponding author: LIU Fang,

Institute of High Energy Physics, CAS Beijing 100049,China2 Department of Modern Physics, University of Science and Technology of China,Hefei,230026,China

Received Date: 2004-12-06
Accepted Date: 1900-01-01
Available Online: 2005-08-05

Abstract: Time of flight counter (TOF) is one of the main subdetectors of Beijing SpectrometerII (BESII) for identification of charge particles. Time of flight and pulse amplitude are measured from the time of flight counters, when the particle hits on the TOF. Based on Di-mu sample from BESII, the correction of pulse amplitude Q is studied. Using the hadron sample of J/ψ, the relation between the corrected Pulse amplitude and βγ value is analyzed. A conclusion is that it is feasible to use the pulse amplitude Q₀ of TOF to identify the particles. Finally the efficiency and error efficiency is given while the pulse amplitude is used to identify the particles.