Decay vertex reconstruction and 3-dimensional lifetime determination at BESⅢ

This paper focuses mainly on the vertex reconstruction of resonance particles with a relatively long lifetime such as KSO, A, as well as on lifetime measurements using a 3-dimensional fit. The kinematic constraints between the production and decay vertices and the decay vertex fitting algorithm based on the least squares method are both presented. Reconstruction efficiencies including experimental resolutions are discussed. The results and systematic errors are calculated based on a Monte Carlo simulation.

作 者： XU Min HE Kang-Lin ZHANG Zi-Ping WANG Yi-Fang BIAN Jian-Ming CAO Guo-Fu CAO Xue-Xiang CHEN Shen-Jian DENG Zi-Yan FU Cheng-Dong GAO Yuan-Ning HAN Lei NAN Shao-Qing HE Miao HU Ji-Feng HU Xiao-Wei HUANG Bin HUANG Xing-Tao JIA Lu-Kui JI Xiao-Sin LI Hai-Bo LI Wei-Dong LIANG Yu-Wie LIU Chun-Xiu LIU Huai-Min LIU Ying LIU Yong LUO Tao L(U) Qi-Wen MA Qiu-Mei MA Xiang MAO Ya-Jun MAO Ze-Pu MO Xiao-Hu NING Fei-Peng PING Rong-Gang QIU Jin-Fa SONG Wen-Bo SUN Sheng-Sen SUN Xiao-Dong SUN Yong-Zhao TIAN Hao-Lai WANG Ji-Ke WANG Liang-Liang WEN Shuo-Pin WU Ling-Hui WU Zhi XIE Yu-Guang YAN Jie YAN Liang YAO Jian YUAN Chang-Zheng YUAN Ye ZHANG Chang-Chun ZHANG Jian-Yong ZHANG Lei ZHANG Xue-Yao ZHANG Yao ZHENG Yang-Heng ZHU Yong-Sheng ZOU Jia-Heng   作者單位： 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,DENG Zi-Yan,FU Cheng-Dong,HE Miao,JI Xiao-Sin,LI Hai-Bo,LI Wei-Dong,LIU Chun-Xiu,LIU Huai-Min,MA Qiu-Mei,MAO Ze-Pu,MO Xiao-Hu,PING Rong-Gang,QIU Jin-Fa,SUN Sheng-Sen,SUN Yong-Zhao,WEN Shuo-Pin,XIE Yu-Guang,YUAN Chang-Zheng,YUAN Ye,ZHANG Chang-Chun,ZHANG Jian-Yong,ZHANG Yao,ZHU Yong-Sheng(Institute of High Energy Physics, CAS, Beijing 100049, China)

ZHANG Zi-Ping,YAN Jie(Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China)

BIAN Jian-Ming,CAO Guo-Fu,CAO Xue-Xiang,HUANG Bin,JIA Lu-Kui,LIU Yong,LUO Tao,MA Xiang,SUN Xiao-Dong,TIAN Hao-Lai,WANG Ji-Ke,WANG Liang-Liang,WU Ling-Hui,WU Zhi,YAN Liang(Institute of High Energy Physics, CAS, Beijing 100049, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China)

CHEN Shen-Jian,HU Xiao-Wei,ZHANG Lei(Nanjing University, Nanjing 210093, China)

GAO Yuan-Ning(Tsinghua University, Beijing 100084, China)

HAN Lei(Henan Normal University, Henan 453007, China)

NAN Shao-Qing(Nanjing Normal University, Nanjing 210097, China)

HU Ji-Feng,ZHENG Yang-Heng(Graduate University of Chinese Academy of Sciences, Beijing 100049, China)

HUANG Xing-Tao,ZHANG Xue-Yao,ZOU Jia-Heng(Shandong University, Jinan 250100, China)

LIANG Yu-Wie,MAO Ya-Jun(Peking University, Beijing 100871, China)

LIU Ying(Guangxi University, Nanning 530004, China)

L(U) Qi-Wen,NING Fei-Peng(Shanxi University, Taiyuan 003006, China)

SONG Wen-Bo,YAO Jian(Zhengzhou University, Zhengzhou 450001, China) 

刊 名： 中國物理C（英文版）  ISTIC 英文刊名： CHINESE PHYSICS　C  年，卷(期)： 2009 33(6)  分類號： O4  關鍵詞： decay vertex   resolution of decay length   lifetime   reconstruction efficiency  

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