| R值扫描实验中触发效率的测量 |
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| 引用本文： | 黄光顺,李忠朝,苑长征,祁向荣,赵棣新,过雅南,顾建辉,郁忠强,李小南,张家文,赵政国.R值扫描实验中触发效率的测量[J].中国物理 C,2001,25(9):889-897. |
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| 作者姓名： | 黄光顺 李忠朝 苑长征 祁向荣 赵棣新 过雅南 顾建辉 郁忠强 李小南 张家文 赵政国 |
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| 作者单位： | [1]中国高等科学技术中心，北京100080 [2]中国科学院高能物理研究所，北京100039 |
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| 基金项目： | 国家自然科学基金 (1 9991 4 80 ,1 982 5 1 1 6,1 980 5 0 0 9)，中国科学院重大及特别支持项目 (KJ95T -0 3 )，中国科学院百人计划基金资助~~ |
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| 摘 要： | 介绍了北京正负电子对撞机(BEPC)/北京谱仪(BES)R值扫描实验中触发效率的测量方法,BES触发判选系统触发条件表的设置,给出了R值测量实验期间各触发条件、触发道以及不同类型事例的触发效率.
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| 关 键 词： | 触发效率 R值 强子事例 |
| 收稿时间： | 2000-9-29 |
Trigger Efficiency Measurement in R Scan Experiment |
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| HUANG Guang Shun , \ LI Zhong Chao \ YUAN Chang Zheng \ QI Xiang Rong ZHAO Di Xin \ GUO Ya Nan \ GU Jian Hui \ YU Zhong Qiang \ LI Xiao Nan ZHANG Jia Wen \ ZHAO Zheng Guo.Trigger Efficiency Measurement in R Scan Experiment[J].High Energy Physics and Nuclear Physics,2001,25(9):889-897. |
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| Authors: | HUANG Guang Shun \ LI Zhong Chao \ YUAN Chang Zheng \ QI Xiang Rong ZHAO Di Xin \ GUO Ya Nan \ GU Jian Hui \ YU Zhong Qiang \ LI Xiao Nan ZHANG Jia Wen \ ZHAO Zheng Guo |
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| Institution: | HUANG Guang Shun 1,2,1) \ LI Zhong Chao 2 \ YUAN Chang Zheng 2 \ QI Xiang Rong 2 ZHAO Di Xin 2 \ GUO Ya Nan 2 \ GU Jian Hui 2 \ YU Zhong Qiang 2 \ LI Xiao Nan 2 ZHANG Jia Wen 2 \ ZHAO Zheng Guo 2 |
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| Abstract: | A method is introduced to measure the trigger efficiency in R scan experiment carried out with BESII at BEPC. The design of trigger table, offline event selection and calculation of efficiency are described. The principle of trigger efficiency measurement is: a data sample for specific physics event type is chosen orthogonally to certain trigger condition at both online trigger level and offline selection level; and then the ratio of number of events in the sample which satisfy the trigger condition to the total number of events in the sample is the efficiency of this trigger condition. The efficiencies of various trigger conditions, trigger channels and event types are given. |
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| Keywords: | trigger efficiency R value hadronic event |
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