Trigger Efficiency Measurement in R Scan Experiment

HUANG Guang-Shun; LI Zhong-Chao; YUAN Chang-Zheng; QI Xiang-Rong; ZHAO Di-Xin; GUO Ya-Nan; GU Jian-Hui; YU Zhong-Qiang; LI Xiao-Nan; ZHANG Jia-Wen; ZHAO Zheng-Guo

Chinese Physics C> 2001, Vol. 25> Issue(9) : 889-897

Trigger Efficiency Measurement in R Scan Experiment

China Center of Advanced Science and Technology, Beijing 100080, China2 Institute of High Energy Physics, CAS, Beijing 100039, China

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Abstract：
A method is introduced to measure the trigger efficiency in R scan experiment carried out with BESII at BEPC. The design of trigger table, offline event selection and calculation of efficiency are described. The principle of trigger efficiency measurement is: a data sample for specific physics event type is chosen orthogonally to certain trigger condition at both online trigger level and offline selection level; and then the ratio of number of events in the sample which satisfy the trigger condition to the total number of events in the sample is the efficiency of this trigger condition. The efficiencies of various trigger conditions, trigger channels and event types are given.

References

[1]

. BAI Jing-Zhi et al.Nucl.Instr.and Meth.inPhys.Res.,1994,A344:319 2. DING Hui-Liang et al.High Energy Phys.and Nucl.Phys.,1992,16:769(in Chinese)(丁慧良等.高能物理与核物理,1992,16:769) 3. BAI Jing-Zhi et al.The BES Upgrade.Nucl.Instr.and Meth.in Phys.Res.,2001,A458:627 4. BAI Jing-Zhi et al.Phys.Rev.Lett.,2000,84:5945. ZHAO Zheng-Guo.New R Values in 2—5 GeV from the BESII at BEPC .,In:Proceedings of 30th lnternational Conference on High Energy Physics.Singapore:WorldS cientific Publishiny Company.2001, (to be published)6. Davier M ,Hoeker A .Phys.Lett.,1998,B419:419 7. Pietryyk B .The Global Fit to Electroweak Data.In:Proceedings of 30th lnternational Conference on High Energy Physics.Sin gapore:World Scientific Publishiny Company.2001,(to be published) 8. HUANG Guang-Shun et al.High Energy Phys.and Nucl.Phys.2000,24:373(in Chinese)(黄光顺等.高能物理与核物理,2000,24:373) 9. CHEN Jiang-Chuan et al.Phys.Rev.,2000,D62:03400310. QI Xiang-Rong et al.High Energy Phys.and Nucl.Phys.,1999,23:1(in Chinese)(祁向荣等.高能物理与核物理,1999,23:1) 11. HU Hai-Ming et al.High Energy Phys.and Nucl.Phys.,2001,25(8):701(in Chinese)(胡海明等.高能物理与核物理,2001,25(8):701) 12. WANG Zhi-Yong et al.High Energy Phys.and Nucl.Phys.,2001,25(2):89(in Chinese)(王至勇等.高能物理与核物理,2001,25(2):89)13. YU Zhong-Qiang et al.High Energy Phys.and Nucl.Phys.,1995,19:1062(in Chinese)(郁忠强等.高能物理与核物理,1995,19:1062)14. HUANG Guang-Shun.Trigger Efficiency Determination in the First R Scan.In:BES Couaboration The 8th BES Annual Meeting,Beijing June1999,140—147

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HUANG Guang-Shun, LI Zhong-Chao, YUAN Chang-Zheng, QI Xiang-Rong, ZHAO Di-Xin, GUO Ya-Nan, GU Jian-Hui, YU Zhong-Qiang, LI Xiao-Nan, ZHANG Jia-Wen and ZHAO Zheng-Guo. Trigger Efficiency Measurement in R Scan Experiment[J]. Chinese Physics C, 2001, 25(9): 889-897.

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Received: 2000-09-29
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Trigger Efficiency Measurement in R Scan Experiment

Corresponding author: HUANG Guang-Shun,

China Center of Advanced Science and Technology, Beijing 100080, China2 Institute of High Energy Physics, CAS, Beijing 100039, China

Received Date: 2000-09-29
Accepted Date: 1900-01-01
Available Online: 2001-09-05

Abstract: A method is introduced to measure the trigger efficiency in R scan experiment carried out with BESII at BEPC. The design of trigger table, offline event selection and calculation of efficiency are described. The principle of trigger efficiency measurement is: a data sample for specific physics event type is chosen orthogonally to certain trigger condition at both online trigger level and offline selection level; and then the ratio of number of events in the sample which satisfy the trigger condition to the total number of events in the sample is the efficiency of this trigger condition. The efficiencies of various trigger conditions, trigger channels and event types are given.