分类： 物理学 >> 核物理学 提交时间： 2016-09-14
Wen-Long Yuan
Xiao-Cong Ai
Xiao-Bin Ji
Shen-Jian Chen
Yao Zhang
Ling-Hui Wu
Liang-Liang Wang
Ye Yuan
摘要： Based on J/ψ events collected with the BESIII detector, with corresponding Monte Carlo samples, the tracking efficiency and its systematic uncertainty are studied using a control sample of J/ψ→pp¯¯¯π+π−. Validation methods and different factors influencing the tracking efficiency are presented in detail. The tracking efficiency and its systematic uncertainty for protons and pions with the transverse momentum and polar angle dependence are also discussed.
分类： 物理学 >> 核物理学 提交时间： 2016-09-02
Xin-Hua Sun
Liang-Liang Wang
Ling-Hui Wu
Xu-Dong J
Qing-Lei Xiu
Liao-Yuan Dong
Ming-Yi Dong
Wei-Dong Li
Wei-Guo Li
Huai-Min Liu
Qun Ou-Yang
Ye Yuan
Yao Zhang
摘要： The relative differences in coordinates of Cylindrical-Gas-Electron-Multiplier-Detector-based Inner Tracker (CGEM-IT) clusters are studied to search for track segments in CGEM-IT. With the full simulation of single muon track samples, clear patterns are found and parameterized for the correct cluster combinations. The cluster combinations satisfying the patterns are selected as track segment candidates in CGEM-IT with an efficiency higher than 99%. The parameters of the track segments are obtained by a helix fitting. Some chi-squared quantities, evaluating the differences in track parameters between the track segments in CGEM-IT and the tracks found in Outer-Drift-Chamber (ODC), are calculated and used to match them. Proper chi-squared requirements are determined as a function of transverse momentum and the matching efficiency is found reasonable.
点击量
待评议
点击量
下载量
评论
