Pattern-Matching Track Reconstruction for the BESⅢ Main Drift Chamber

ZHANG Yao; ZHANG Xue-Yao; LI Wei-Dong; MAO Ze-Pu; MA Qiu-Mei; MA Xiang; WANG Liang-Liang; WANG Ji-Ke; DENG Zi-Yan; YOU Zheng-Yun; WEN Shuo-Pin; BIAN Jian-Ming

Chinese Physics C> 2007, Vol. 31> Issue(6) : 570-575

Pattern-Matching Track Reconstruction for the BESⅢ Main Drift Chamber

Shandong University, Ji'nan 250100, China2 Institute of High Energy Physics, CAS, Beijing 100049, China3 Graduate University of Chinese Academy of Sciences, Beijing 100049, China4 School of Physics, Peking University, Beijing 100871, China5 Hunan University, Changsha 410082, China

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Abstract：
The tracking algorithm, MdcPatRec, is developed for the Drift Chamber of the BESⅢ detector using C++ language and object-oriented techniques. This algorithm uses a pattern matching method to find track segments and then combine them into track candidates followed by a least square fit. With the simulation data, the tracking performances such as efficiencies and momentum resolution have been studied and results are consistent with parameters from detector design. The algorithm is also proved to be robust enough to process data with severe background expected by the BESⅢ experiment.

References

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. BEPC/ Preliminary Design Report, 20022. Preliminary Design Report of the BES0 Detector, Jan,20043. BaBar Technical Design Report, SLAC-REP-950457. 19954. LI Wei-Dong, LIU Huai-Min et al. The Oine Software forthe BES0 Experiment. Proceeding of CHEP06. Mumbai,20065. WANG Da-Yong et al. Kalman Track Fitting for BES0.Nuclear Electronics Detection Technology, accepted(in Chinese)(王大勇等.核电r学与探测技术(已接收))6. Agostinelli S et al(Geant 4 Collaboration). Nucl. Instrum.Methods, 2003, A506: 2507. DENG Zi-Yan et al. HEP NP, 2006, 30(5): 371-377(in Chinese)(邓子艳等.高能物理与核物理,2006, 30(5): 371-377)8. LIU Jian-Bei et al. Nucl. Instrum. Methods, 2006, A557:436-4449. Robert Kutschke, Anders Ryd. Billoir Fitter for CLEO II,CBX 96-20. 199610. BAI J Z et al(BES Collaboration). Nucl. Instrum. Methods,2001, A458: 62711. DENG Zi-Yan et al. HEP NP, 2003, 27(10): 909-913(in Chinese)(邓子艳等.高能物理与核物理,2003, 27(10): 909-913)12. BAI J Z et al(BES Collaboration). Phys. Rev. Lett., 2004,92: 052001

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ZHANG Yao, ZHANG Xue-Yao, LI Wei-Dong, MAO Ze-Pu, MA Qiu-Mei, MA Xiang, WANG Liang-Liang, WANG Ji-Ke, DENG Zi-Yan, YOU Zheng-Yun, WEN Shuo-Pin, BIAN Jian-Ming, Pattern-Matching Track Reconstruction for the BESⅢ Main Drift Chamber[J]. Chinese Physics C, 2007, 31(6): 570-575.

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Received: 2006-09-12
Revised: 2006-09-19

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沈阳化工大学材料科学与工程学院沈阳 110142

Pattern-Matching Track Reconstruction for the BESⅢ Main Drift Chamber

Corresponding author: ZHANG Yao,

Shandong University, Ji'nan 250100, China2 Institute of High Energy Physics, CAS, Beijing 100049, China3 Graduate University of Chinese Academy of Sciences, Beijing 100049, China4 School of Physics, Peking University, Beijing 100871, China5 Hunan University, Changsha 410082, China

Received Date: 2006-09-12
Accepted Date: 2006-09-19
Available Online: 2007-06-05

Abstract: The tracking algorithm, MdcPatRec, is developed for the Drift Chamber of the BESⅢ detector using C++ language and object-oriented techniques. This algorithm uses a pattern matching method to find track segments and then combine them into track candidates followed by a least square fit. With the simulation data, the tracking performances such as efficiencies and momentum resolution have been studied and results are consistent with parameters from detector design. The algorithm is also proved to be robust enough to process data with severe background expected by the BESⅢ experiment.