Study of cluster reconstruction and track fitting algorithmsfor CGEM-IT at BESIII

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Yue Guo, Liang-Liang Wang, Xu-Dong Ju, Ling-Hui Wu, Qing-Lei Xiu, Hai-Xia Wang, Ming-Yi Dong, Jing-Ran Hu, Wei-Dong Li, Wei-Guo Li, Huai-Min Liu and Qun Ou-Yang. Study of cluster reconstruction and track fitting algorithmsfor CGEM-IT at BESIII[J]. Chinese Physics C, 2016, 40(1): 016201. doi: 10.1088/1674-1137/40/1/016201
Yue Guo, Liang-Liang Wang, Xu-Dong Ju, Ling-Hui Wu, Qing-Lei Xiu, Hai-Xia Wang, Ming-Yi Dong, Jing-Ran Hu, Wei-Dong Li, Wei-Guo Li, Huai-Min Liu and Qun Ou-Yang. Study of cluster reconstruction and track fitting algorithmsfor CGEM-IT at BESIII[J]. Chinese Physics C, 2016, 40(1): 016201.  doi: 10.1088/1674-1137/40/1/016201 shu
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Received: 2015-04-13
Revised: 2015-06-16
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    Supported by National Key Basic Research Program of China (2015CB856700), National Natural Science Foundation of China (11205184, 11205182) and Joint Funds of National Natural Science Foundation of China (U1232201)

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Study of cluster reconstruction and track fitting algorithmsfor CGEM-IT at BESIII

    Corresponding author: Yue Guo,
    Corresponding author: Liang-Liang Wang,
  • 1. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • 2. University of Chinese Academy of Sciences, Beijing 100049, China
  • 3.  Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • 4.  Central China Normal University, Wuhan 430079, China
Fund Project:  Supported by National Key Basic Research Program of China (2015CB856700), National Natural Science Foundation of China (11205184, 11205182) and Joint Funds of National Natural Science Foundation of China (U1232201)

Abstract: Considering the effects of aging on the existing Inner Drift Chamber (IDC) of BESIII, a GEM-based inner tracker, the Cylindrical-GEM Inner Tracker (CGEM-IT), is proposed to be designed and constructed as an upgrade candidate for the IDC. This paper introduces a full simulation package for the CGEM-IT with a simplified digitization model, and describes the development of software for cluster reconstruction and track fitting, using a track fitting algorithm based on the Kalman filter method. Preliminary results for the reconstruction algorithms which are obtained using a Monte Carlo sample of single muon events in the CGEM-IT, show that the CGEM-IT has comparable momentum resolution and transverse vertex resolution to the IDC, and a better z-direction resolution than the IDC.

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