BESⅡ Error Matrix Correction on Charged Channel

HONG Tao; LV Feng; ZHANG Chang-Chun; TONG Guo-Liang; SHEN Xiao-Yan; MAO Ze-Pu; LI Wei-Guo; SUN Liang-Feng; BIAN Jian-Guo; WANG Jun; YU Guo-Wei; YUAN Jian-Ming

Chinese Physics C> 2001, Vol. 25> Issue(7) : 607-616

BESⅡ Error Matrix Correction on Charged Channel

Institute of High Energy Physics,CAS,Beijing 100039,China

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Abstract：
The error matrix correction for charged track parameters of BESⅡ detector is carefully studied. The proper MDC wire spatial resolution (σ=250μm) and Q correction are incorporated into BESⅡ data reconstruction program. The BESⅡ effective material passed through by tracks from interaction point to MDC is taken into account in the kinematics fitting package TELESIS,to correct the multiple scattering and dE/dX energy loss effects. By analyzing the J/ψ→μ⁺μ^－ data sample,the RUN by RUN error matrix calibration is completed for BESⅡ 24×10⁶ J/ψ events. After these corrections of the error matrix,TELESIS can be applied to BESⅡ J/ψ data analysis with fairly good accuracy.

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HONG Tao, LV Feng, ZHANG Chang-Chun, TONG Guo-Liang, SHEN Xiao-Yan, MAO Ze-Pu, LI Wei-Guo, SUN Liang-Feng, BIAN Jian-Guo, WANG Jun, YU Guo-Wei and YUAN Jian-Ming. BESⅡ Error Matrix Correction on Charged Channel[J]. Chinese Physics C, 2001, 25(7): 607-616.

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Received: 2000-10-30
Revised: 1900-01-01

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