Track reconstruction in the BESⅢ muon counter

• 作 者: LIANG Yu-Tie LIU Kun YOU Zheng
• 机 构: School of Physics and State Key Laboratory of Nuclear Physics & Technology,Institute of High Energy
• 出 处: 中国物理C（英文版）
• 发表日期: 2004年期
• 关键词: BESⅢ MUC reconstruction

The reconstruction algorithm for BESⅢ Muon Counter, MucRecAlg, is developed with the object-oriented language C++ in BESⅢ offline software environment. MucRecAlg consists of the following functions: to find track seeds either from extrapolation of tracks in the main drift chamber or from the fired strips in muon counter, to select fired strips associated to the candidate tracks, to fit the candidate tracks with a linear or quadratic function and to calculate other parameters of the tracks for muon identification. Monte Carlo samples are generated to check the performance of the reconstruction package, such as reconstruction efficiency, muon remaining rate and pion rejection rate, etc. The preliminary results show that the pion rejection rate is around 3%-4% while the muon remaining rate is better than 90% in 0.4-1.6 GeV/c momentum region, which meets the requirement as shown in the design report.