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Track reconstruction in the BESⅢ muon counter

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【作者】 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

【Author】 LIANG Yu-Tie1;1) LIU Kun1 YOU Zheng-Yun1 MAO Ya-Jun1;2) LI Wei-Dong2;3) BIAN Jian-Ming2,3 CAO Guo-Fu2,3 CAO Xue-Xiang2,3 CHEN Shen-Jian4 DENG Zi-Yan2 FU Cheng-Dong(2 GAO Yuan-Ning5 HAN Lei6 HAN Shao-Qing7 HE Kang-Lin2 HE Miao2 HU Ji-Feng3 HU Xiao-Wei4 HUANG Bin2,3 HUANG Xing-Tao8 JIA Lu-Kui2,3 JI Xiao-Bin2 LI Hai-Bo2 LIU Bei-Jiang2,3 LIU Chun-Xiu2 LIU Huai-Min2 LIU Ying9 LIU Yong2,3 LUO Tao2,3 LU¨ Qi-Wen10 MA Qiu-Mei2 MA Xiang,3 MAO Ze-Pu2 MO Xiao-Hu2 NING Fei-Peng10 PING Rong-Gang(2 QIU Jin-Fa2 SONG Wen-Bo11 SUN Sheng-Sen2 SUN Xiao-Dong2,3 SUN Yong-Zhao2 TIAN Hao-Lai2,3 WANG Ji-Ke2,3 WANG Liang-Liang,3 WEN Shuo-Pin2 WU Ling-Hui2,3 WU Zhi2,3 XIE Yu-Guang2 XU Min12 YAN Jie12 YAN Liang2,3 YAO Jian11 YUAN Chang-Zheng2 YUAN Ye2 ZHANG Chang-Chun2 ZHANG Jian-Yong2 ZHANG Lei4 ZHANG Xue-Yao8 ZHANG Yao2 ZHENG Yang-Heng3 ZHU Yong-Sheng(2 ZOU Jia-Heng8 1 (School of Physics and State Key Laboratory of Nuclear Physics & Technology, Peking University, Beijing 100871, China) 2 (Institute of High Energy Physics, CAS, Beijing 100049, China) 3 (Graduate University of Chinese Academy of Sciences, Beijing 100049, China) 4 (Nanjing University, Nanjing 210093, China) 5 (Tsinghua University, Beijing 100084, China) 6 (Henan Normal University, Henan 453007, China) 7 (Nanjing Normal University, Nanjing 210097, China) 8 (Shandong University, Jinan 250100, China) 9 (Guangxi University, Nanning 530004, China) 10 (Shanxi University, Taiyuan 003006, China) 11 (Zhengzhou University, Zhengzhou 450001, China) 12 (Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China)

【机构】 School of Physics and State Key Laboratory of Nuclear Physics & Technology, Peking UniversityInstitute of High Energy Physics, CASGraduate University of Chinese Academy of SciencesNanjing UniversityTsinghua UniversityHenan Normal UniversityNanjing Normal UniversityShandong UniversityGuangxi UniversityShanxi UniversityZhengzhou UniversityDepartment of Modern Physics, University of Science and Technology of China

【摘要】 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.

【Abstract】 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.

【关键词】 BESⅢMUCreconstruction
【Key words】 BESⅢMUCreconstruction
【基金】 Supported by National Natural Science Foundation of China (10375002, 10675004, 10821063);Research and Development Project of Important Scientific Equipment of CAS (H7292330S7)
  • 【文献出处】 中国物理C ,Chinese Physics C , 编辑部邮箱 ,2009年08期
  • 【分类号】TH711
  • 【下载频次】40
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