Alignment and measurement of the magnetic field for the BESIII muon counter
Gao Q(高清); Zhang JZ(张景芝); Gao, Q; Zhang, JZ; Li, CH; Yin, JH; Yin JH(殷俊昊)
刊名CHINESE PHYSICS C
2016
卷号40期号:11
关键词di-muon process MUC alignment magnetic field strength measurement
DOI10.1088/1674-1137/40/11/116001
通讯作者高清 ; 张景芝
文章类型Article
英文摘要Based on cosmic ray events without a magnetic field taken with the BESIII detector during the summer shutdown of BEPCII in 2012 and di-muon events from a data sample taken at center-of-mass energy of 3.686 GeV in 2009, we compare the coordinates of hits registered in the BESIII muon counter with the expected interaction point extrapolated from reconstructed tracks from the inner tracking system in the absence of a magnetic field. By minimizing the difference, we align the muon counter with the inner tracking system. Moreover, the strength of the magnetic field in the muon counter is measured for the first time with di-muon events from data taken at a center of-mass energy of 3.686 GeV. After the alignment and the magnetic field strength measurement, the offsets in the reconstructed hit positions for muon tracks are reduced, which improves the muon identification. The alignment and magnetic field strength measurement have been adopted in the latest version of the BESIII offline software system. This addition to the software reduces the systematic uncertainty for the physics analysis in cases where the muon counter information is used.
语种英语
WOS记录号WOS:000389144400016
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/261003
专题中国科学院高能物理研究所_实验物理中心_期刊论文
中国科学院高能物理研究所_实验物理中心
作者单位中国科学院高能物理研究所
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Gao Q,Zhang JZ,Gao, Q,et al. Alignment and measurement of the magnetic field for the BESIII muon counter[J]. CHINESE PHYSICS C,2016,40(11).
APA 高清.,张景芝.,Gao, Q.,Zhang, JZ.,Li, CH.,...&殷俊昊.(2016).Alignment and measurement of the magnetic field for the BESIII muon counter.CHINESE PHYSICS C,40(11).
MLA 高清,et al."Alignment and measurement of the magnetic field for the BESIII muon counter".CHINESE PHYSICS C 40.11(2016).
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