Chinese Physics C > 2008, Vol. 32 > Issue(9): 744-749 DOI: 10.1088/1674-1137/32/9/012

Determination of event start time at BESⅢ

MA Xiang^,

Institute of High Energy Physics, CAS, Beijing 100049, China2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China3 CCASTWorld Laboratory, Beijing 100080, China4 Tsinghua University, Beijing 100084, China5 Nanjing University, Nanjing 210093, China6 Zhengzhou University, Zhengzhou 450001, China7 Peking University, Beijing 100871, China8 Liaoning University, Shenyang 110036, China9 Guangxi Normal University, Guilin 541004, China10 Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China11 Shandong University, Jinan 250100, China

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Abstract：

The principle of the method for the BESⅢ event start time determination and the code construction are described. The investigation of influence of the noise, the method of rejecting noise and the performance checking by the Monte Carlo physics data sample are also presented. The preliminary results got from the Monte Carlo simulation are presented, the reconstruction efficiency of J/ψ→ anything events at noise level 0~60% can achieve above 99%, and the error rate is below 1%.

References

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[1]	M. Ablikim,et al. Determination of the number of ψ (3686) events at BESⅢ. Chinese Physics C, 2018, 42(2): 023001.doi:10.1088/1674-1137/42/2/023001
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[4]	CAO Ping,SUN Wei-Jia,JI Xiao-Lu,FAN Huan-Huan,WANG Si-Yu,LIU Shu-Bin,AN Qi. Prototype of time digitizing system for BESⅢ endcap TOF upgrade. Chinese Physics C, 2014, 38(4): 046101.doi:10.1088/1674-1137/38/4/046101
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[7]	M. Ablikim et al (BESⅢ collaboration). Determination of the number of J/ψ events with J/ψ → inclusive decays. Chinese Physics C, 2012, 36(10): 915-925.doi:10.1088/1674-1137/36/10/001
[8]	LI Yong-Ming,RUAN Xi-Chao,ZHOU Bin,MA Zhong-Yuan. Determination of the time resolution for neutron scintillation detectors by multi-coincidence measurement. Chinese Physics C, 2011, 35(5): 475-477.doi:10.1088/1674-1137/35/5/014
[9]	ZHAO Chuan,SUN Sheng-Sen,LI Cheng,ZHANG Xiao-Jie,HE Kang-Lin,AN Qi,CHEN Hong-Fang,DAI Hong-Liang,FENG Chang-Qing,HENG Yue-Kun,HUANG Ya-Qi,HUANG Yan-Ping,GUO Jian-Hua,LI Wei-Dong,LI Xiu-Rong,LIU Fang,LIU Huai-Min,LIU Shu-Bin,LIU Shu-Dong,LIU Yong,MA Xiang,MAO Ze-Pu,SHAO Ming,SUN Yong-Jie,SUN Zhi-Jia,WU Jin-Jie,YANG Gui-An,ZHAO Lei,ZHU Xing-Wang,ZUO Jia-Xu. Time calibration for the end cap TOF system of BESⅢ. Chinese Physics C, 2011, 35(1): 72-78.doi:10.1088/1674-1137/35/1/015
[10]	YAN Jie,SUN Sheng-Sen,LI Cheng,HE Kang-Lin. BESⅢ barrel time-of-flight (TOF) calibration using cosmic ray data. Chinese Physics C, 2010, 34(3): 368-373.doi:10.1088/1674-1137/34/3/012
[11]	XU Min,HE Kang-Lin,ZHANG Zi-Ping,WANG Yi-Fang. Decay vertex reconstruction and 3-dimensional lifetime determination at BESⅢ. Chinese Physics C, 2009, 33(6): 428-435.doi:10.1088/1674-1137/33/6/005
[12]	FU Cheng-Dong,ZOU Jia-Heng,MO Xiao-Hu,HE Kang-Lin,BIAN Jian-Ming,CAO Guo-Fu,CAO Xue-Xiang,CHEN Shen-Jian,DENG Zi-Yan,GAO Yuan-Ning,HE Miao,HUA Chun-Fei,HUANG Bin,HUANG Xing-Tao,JI Xiao-Bin,LI Fei,LI Hai-Bo,LI Wei-Dong,LIANG Yu-Tie,LIU Chun-Xiu,LIU Huai-Min,LIU Qiu-Guang,LIU Suo,LIU Ying-Jie,MA Qiu-Mei,MA Xiang,MAO Ya-Jun,MAO Ze-Pu,PAN Ming-Hua,PANG Cai-Ying,PING Rong-Gang,QIN Gang,QIN Ya-Hong,QIU Jin-Fa,SUN Sheng-Sen. Study of the online event filtering algorithm for BESⅢ. Chinese Physics C, 2008, 32(5): 329-337.doi:10.1088/1674-1137/32/5/001
[13]	PING Rong-Gang. Event generators at BESⅢ. Chinese Physics C, 2008, 32(8): 599-602.doi:10.1088/1674-1137/32/8/001
[14]	SHAN Li-Min,SHANG Lei,WANG Zhi-Gang,XIE Wen-Jie,QIN Gang,LIU Chun-Xiu,YU Bo-Xiang,DONG Ming-Yi,CAI Xiao,ZHOU Li,XIA Xiao-Mi,LAI Yuan-Fen,WANG Man,LIU Wan-Jin,SUN Li-Jun,FANG Jian,HE Miao,HU Tao,LV Jun-Guang. Time Information Study of CsI(Tl) Crystal Calorimeter of BESⅢ. Chinese Physics C, 2006, 30(11): 1091-1095.
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MA Xiang. Determination of event start time at BESⅢ[J]. Chinese Physics C, 2008, 32(9): 744-749. doi: 10.1088/1674-1137/32/9/012

MA Xiang. Determination of event start time at BESⅢ[J]. Chinese Physics C, 2008, 32(9): 744-749. doi:10.1088/1674-1137/32/9/012 shu

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Received: 2007-11-19
Revised: 2007-12-11

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通讯作者:陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Determination of event start time at BESⅢ

Corresponding author:MA Xiang,

Institute of High Energy Physics, CAS, Beijing 100049, China2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China3 CCASTWorld Laboratory, Beijing 100080, China4 Tsinghua University, Beijing 100084, China5 Nanjing University, Nanjing 210093, China6 Zhengzhou University, Zhengzhou 450001, China7 Peking University, Beijing 100871, China8 Liaoning University, Shenyang 110036, China9 Guangxi Normal University, Guilin 541004, China10 Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China11 Shandong University, Jinan 250100, China

Received Date:2007-11-19

Accepted Date:2007-12-11

Available Online:2008-09-05

Abstract:

The principle of the method for the BESⅢ event start time determination and the code construction are described. The investigation of influence of the noise, the method of rejecting noise and the performance checking by the Monte Carlo physics data sample are also presented. The preliminary results got from the Monte Carlo simulation are presented, the reconstruction efficiency of J/ψ→ anything events at noise level 0~60% can achieve above 99%, and the error rate is below 1%.

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Determination of event start time at BESⅢ

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