BESIII track fitting algorithm

• Published in: Chinese physics C Vol. 33; no. 10; pp. 870 - 879
• Main Authors: Ji-Ke, Wang, Ze-Pu, Mao, Jian-Ming, Bian, Guo-Fu, Cao, Xue-Xiang, Cao, Shen-Jian, Chen, Zi-Yan, Deng, Cheng-Dong, Fu, Yuan-Ning, Gao, Kang-Lin, He, Miao, He, Chun-Fei, Hua, Bin, Huang, Xing-Tao, Huang, Xiao-Bin, Ji, Fei, Li, Bai-Bo, Li, Wei-Dong, Li, Yu-Tie, Liang, Chun-Xiu, Liu, Huai-Min, Liu, Suo, Liu, Ying-Jie, Liu, Qiu-Mei, Ma, Xiang, Ma, Ya-Jun, Mao, Xiao-Hu, Mo, Ming-Hua, Pan, Cai-Ying, Pang, Rong-Gang, Ping, Ya-Hong, Qin, Jin-Fa, Qiu, Sheng-Sen, Sun, Yong-Zhao, Sun, Liang-Liang, Wang, Shuo-Pin, Wen, Ling-Hui, Wu, Yu-Guang, Xie, Min, Xu, Liang, Yan, Zheng-Yun, You, Chang-Zheng, Yuan, Ye, Yuan, Bing-Yun, Zhang, Chang-Chun, Zhang, Jian-Yong, Zhang, Xue-Yao, Zhang, Yao, Zhang, Yang-Heng, Zheng, Ke-Jun, Zhu, Yong-Sheng, Zhu, Zhi-Li, Zhu, Jia-Heng, Zou
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.10.2009; Institute of High Energy Physics,CAS,Beijing 100049,China; Graduate University of Chinese Academy of Sciences,Beijing 100049,China%Institute of High Energy Physics,CAS,Beijing 100049,China%Nanjing University,Nanjing 210093,China%Tsinghua University,Beijing 100084,China; Institute of High Energy Physics,CAS,Beijing 100049,China%Tsinghua University,Beijing 100084,China%Zhengzhou University,Zhengzhou 450001,China%Shandong University,Jinan 250100,China%Peking University,Beijing 100871,China%Liaoning University,Shenyang 110036,China%Guangxi Normal University,Guilin 541004,China%Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China%Graduate University of Chinese Academy of Sciences,Beijing 100049,China
• Subjects: track fitting algorithm; BESⅢ main drift chamber; Kalman filter method
• ISSN: 1674-1137; 2058-6132; 0254-3052
• DOI: 10.1088/1674-1137/33/10/010

O4; A track fitting algorithm based on the Kalman filter method has been developed for BESⅢ of BEPCⅡ.The effects of multiple scattering and energy loss when the charged particles go through the detector,non-uniformity of magnetic field (NUMF) and wire sag, etc., have been carefully handled.This algorithm works well and the performance satisfies the physical requirements tested by the simulation data.