| Primary vertex reconstruction based on the Kalman filter technique at BESⅢ |
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| 作者单位： | XU Min(Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China;Institute of High Energy Physics, CAS, Beijing 100049, China);HE Kang-Lin,WANG Yi-Fang,FU Cheng-Dong,JI Xiao-Bin,SUN Sheng-Sen,ZHANG Jian-Yong(Institute of High Energy Physics, CAS, Beijing 100049, China);ZHANG Zi-Ping(Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China);BIAN Jian-Ming,HUANG Bin,YAN Liang(Institute of High Energy Physics, CAS, Beijing 100049, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China) |
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| 摘 要： | Primary vertex reconstruction is crucial to estimate the beam profile in collision experiments. We study the principle of an iterative process, called the Kalman filter method, and apply it to primary vertex reconstruction at BESⅢ. A Newton procedure to find the zero point of the distance function's gradient is used for primary vertex finding in 3-dimensional space. Results are obtained based on raw data at BESⅢ.
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| 收稿时间： | 2010-01-05 |
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