Track reconstruction in the BESⅢ muon counter

LIANG Yu-Tie; LIU Kun; YOU Zheng-Yun; MAO Ya-Jun; LI Wei-Dong

doi:10.1088/1674-1137/33/8/013

Chinese Physics C> 2009, Vol. 33> Issue(8) : 666-672 DOI: 10.1088/1674-1137/33/8/013

Track reconstruction in the BESⅢ muon counter

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Abstract：
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.

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LIANG Yu-Tie, LIU Kun, YOU Zheng-Yun, MAO Ya-Jun and LI Wei-Dong. Track reconstruction in the BESⅢ muon counter[J]. Chinese Physics C, 2009, 33(8): 666-672. doi: 10.1088/1674-1137/33/8/013

LIANG Yu-Tie, LIU Kun, YOU Zheng-Yun, MAO Ya-Jun and LI Wei-Dong. Track reconstruction in the BESⅢ muon counter[J]. Chinese Physics C, 2009, 33(8): 666-672. doi: 10.1088/1674-1137/33/8/013 shu

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Received: 2008-11-04
Revised: 2008-11-21

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Track reconstruction in the BESⅢ muon counter

Corresponding author: LIANG Yu-Tie,

Received Date: 2008-11-04

Accepted Date: 2008-11-21

Available Online: 2009-08-05

Abstract:

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.

Track reconstruction in the BESⅢ muon counter

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通讯作者: 陈斌, bchen63@163.com

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Track reconstruction in the BESⅢ muon counter

Corresponding author: LIANG Yu-Tie,

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