Chinese Physics C > 2016, Vol. 40 > Issue(9): 096203 DOI: 10.1088/1674-1137/40/9/096203

Track segment finding with CGEM-IT and matching to outer drift chamber tracks in the BESIII detector

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Institution of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

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Abstract：
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 for the BESIII experiment. 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 χ ²quantities, evaluating the differences in track parameters between the track segments in CGEM-IT and the tracks found in the outer drift chamber, are calculated and used to match them. Proper χ ²requirements are determined as a function of transverse momentum and the matching efficiency is found to be reasonable.
- CGEM-IT,
- track segment finding,
- track matching

References

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Xin-Hua Sun, Liang-Liang Wang, Ling-Hui Wu, Xu-Dong Ju, Qing-Lei Xiu, Liao-Yuan Dong, Ming-Yi Dong, Wei-Dong Li, Wei-Guo Li, Huai-Min Liu, Qun Ou-Yang, Ye Yuan and Yao Zhang. Track segment finding with CGEM-IT and matching to outer drift chamber tracks in the BESIII detector[J]. Chinese Physics C, 2016, 40(9): 096203. doi: 10.1088/1674-1137/40/9/096203

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Received: 2016-04-12

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Supported by National Key Basic Research Program of China (2015CB856706), National Natural Science Foundation of China (11575222, 11205184, 11205182, 11121092, 11475185) and Joint Funds of National Natural Science Foundation of China (U1232201)

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通讯作者:陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Track segment finding with CGEM-IT and matching to outer drift chamber tracks in the BESIII detector

Corresponding author:Xin-Hua Sun,

Corresponding author:Liang-Liang Wang,

1. Institution of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

Received Date:2016-04-12

Available Online:2016-09-05

Fund Project:Supported by National Key Basic Research Program of China (2015CB856706), National Natural Science Foundation of China (11575222, 11205184, 11205182, 11121092, 11475185) and Joint Funds of National Natural Science Foundation of China (U1232201)

Abstract: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 for the BESIII experiment. 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. Someχ²quantities, evaluating the differences in track parameters between the track segments in CGEM-IT and the tracks found in the outer drift chamber, are calculated and used to match them. Properχ²requirements are determined as a function of transverse momentum and the matching efficiency is found to be reasonable.

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Track segment finding with CGEM-IT and matching to outer drift chamber tracks in the BESIII detector

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