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

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

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摘要 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. 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.

作者郭玥王亮亮鞠旭东伍灵慧修青磊王海霞董明义胡静然李卫东李卫国刘怀民欧阳群沈肖雁袁野张瑶

机构地区 Institute of High Energy Physics University of Chinese Academy of Sciences Central China Normal University

出处《Chinese Physics C》 SCIE CAS CSCD 2016年第1期92-97,共6页 中国物理C（英文版）

基金 Supported by National Key Basic Research Program of China(2015CB856700) National Natural Science Foundation of China(11205184,11205182) Joint Funds of National Natural Science Foundation of China(U1232201)

关键词 BESIII CGEM-IT SIMULATION cluster reconstruction Kalman filter BESIII, CGEM-IT, simulation, cluster reconstruction, Kalman filter

分类号 O572.21 [理学—粒子物理与原子核物理]

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参考文献10

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

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