Track reconstruction in the BESⅢ muon counter

• Published in: Chinese physics C Vol. 33; no. 8; pp. 666 - 672
• Main Author: 梁羽铁 刘坤 尤郑昀 冒亚军 李卫东 边渐鸣 曹国富 曹学香 陈申见 邓子艳 傅成栋 高原宁 韩磊 韩少卿 何康林 何苗 胡继峰 胡小为 黄彬 黄性涛 贾卢魁 季晓斌 李海波 刘北江 刘春秀 刘怀民 刘颖 刘勇 罗涛 吕绮雯 马秋梅 马想 毛泽普 莫晓虎 宁飞鹏 平荣刚 邱进发 宋文博 孙胜森 孙晓东 孙永昭 田浩来 王纪科 王亮亮 文硕频 伍灵慧 吴智 谢宇广 徐敏 言杰 严亮 姚剑 苑长征 袁野 张长春 张建勇 张雷 张学尧 张瑶 郑阳恒 朱永生 邹佳恒
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.08.2009; Graduate University of Chinese Academy of Sciences, Beijing 100049, China%Nanjing University, Nanjing 210093, China%Tsinghua University, Beijing 100084, China%Henan Normal University, Henan 453007, China%Nanjing Normal University, Nanjing 210097, China%Graduate University of Chinese Academy of Sciences, Beijing 100049, China%Shandong University, Jinan 250100, China%Guangxi University, Nanning 530004, China%Shanxi University, Taiyuan 003006, China%Zhengzhou University, Zhengzhou 450001, China%Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China; School of Physics and State Key Laboratory of Nuclear Physics & Technology, Peking University, Beijing 100871, China%Institute of High Energy Physics, CAS, Beijing 100049, China%Institute of High Energy Physics, CAS, Beijing 100049, China
• Subjects: μ介子; μ子计数器; 主漂移室; 蒙特卡洛; 软件环境; 重建算法; 面向对象; BES; reconstruction; MUC
• ISSN: 1674-1137; 0254-3052; 2058-6132
• DOI: 10.1088/1674-1137/33/8/013

The reconstruction algorithm for BESⅢ Muon Counter, MucRecAlg, is developed with the objectoriented language C＋＋ in BESⅢ offine software environment. MucRecAlg consists of the following functions：to find track seeds either from extrapolation of tracks in the main drift chamber or from the fired strips in muon counter, to select fired strips associated to the candidate tracks, to fit the candidate tracks with a linear or quadratic function and to calculate other parameters of the tracks for muon identification. Monte Carlo samples are generated to check the performance of the reconstruction package, such as reconstruction effciency, muon remaining rate and pion rejection rate, etc. The preliminary results show that the pion rejection rate is around 3%—4% while the muon remaining rate is better than 90% in 0.4—1.6 GeV/c momentum region, which meets the requirement as shown in the design report.