| R值测量中强子事例选择的改进 |
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| 引用本文： | 胡海明,翁瑶,郭义庆,金毅,张丙新,胡君辉,高原宁. R值测量中强子事例选择的改进[J]. 中国物理 C, 2007, 31(9): 802-809 |
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| 作者姓名： | 胡海明 翁瑶 郭义庆 金毅 张丙新 胡君辉 高原宁 |
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| 作者单位： | 中国科学院高能物理研究所，中国科学院高能物理研究所，中国科学院高能物理研究所，中国科学院高能物理研究所，中国科学院高能物理研究所，中国科学院高能物理研究所，清华大学工程物理系 北京 100049，北京 100049，北京 100049，北京 100049 济南大学理学院 济南 250022，北京 100049，北京 100049 广西师范大学物理与电子工程学院 桂林541004，北京 100084 |
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| 摘 要： | 强子事例的选择和强子探测效率是在BEPC/BES上进行R值测量的两项主要误差来源. 过去实验只选取等于或者大于2叉的强子事例, 因而0叉和1叉事例的丢失将导致强子事例数和强子探测效率的较大误差. 试图提出在R值测量中选取包含1叉强子事例在内的样本, 这将有助于更合理地调节强子事例产生器LUARLW的参数, 减小强子探测效率和R值测量的系统误差.
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| 关 键 词： | R值 强子事例 系统误差 事例产生器 |
| 收稿时间： | 2006-10-19 |
| 修稿时间： | 2006-10-19 |
Improvement on Hadronic Event Selection in R Measurement |
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| HU Hai-Ming,WENG Yao,GUO Yi-Qing,JIN Yi,ZHANG Bing-Xin,HU Jun-Hui,GAO Yuan-Ning. Improvement on Hadronic Event Selection in R Measurement[J]. High Energy Physics and Nuclear Physics, 2007, 31(9): 802-809 |
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| Authors: | HU Hai-Ming WENG Yao GUO Yi-Qing JIN Yi ZHANG Bing-Xin HU Jun-Hui GAO Yuan-Ning |
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| Affiliation: | 1 Institute of High Energy Physics, CAS, Beijing 100049, China; 2 Institute of Science, Jinan University, Jinan 250022, China; 3 College of Physics and Electronic Engineering, Guangxi Normal University, Guilin 541004, China; 4 Department of Engineering Physics, Tsinghua University, Beijing 100084, China |
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| Abstract: | Hadronic event selection and hadronic detection efficiency are two main sources of systematic error for the R measurement at BES/BEPC.If only the hadronic events with 2-prong and higher prong are selected as done in the previous measurements,the lost events with 0-prong and 1-prong will cause the systematic error for both of the number of hadronic events and the detection efficiency.This paper aims to present a new method to select the 1-prong hadronic events.It will be helpful to tune the parameters in hadronic events generator LUARLW more reasonably,and decrease the systematic errors of hadronic efficiency in R measurement. |
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| Keywords: | R value hadronic event systematic error event generator |
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