Study of cluster reconstruction and track fitting algorithms for CGEM-IT at BESIII |
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Authors: | 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 Qun Ou-Yang |
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Institution: | 1. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China2. University of Chinese Academy of Sciences, Beijing 100049, China3. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China4. Central China Normal University, Wuhan 430079, China |
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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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Keywords: | BESIII CGEM-IT simulation cluster reconstruction Kalman filter |
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