Correlation Analysis in Time-of-Flight Calibration of BESⅢ

HU Ji-Feng; HE Kang-Lin; ZHANG Zi-Ping; BIAN Jian-Ming; CAO Guo-Fu; DENG Zi-Yan; HE Miao; HUANG Bin; JI Xiao-Bin; LI Gang; LI Hai-Bo; LI Wei-Dong; LIU Chun-

Chinese Physics C> 2007, Vol. 31> Issue(10) : 893-899

Correlation Analysis in Time-of-Flight Calibration of BESⅢ

Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China2 Institute of High Energy Physics, CAS, Beijing 100049, China3 Graduate University of Chinese Academy of Sciences, Beijing 100049, China4 CCASTWorld Laboratory, Beijing 100080, China5 Peking University, Beijing 100871, China6 Hunan University, Changsha 410082, China7 Shandong University, Ji'nan 250100, China

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The errors and correlations of BESIII TOF measurements are carefully checked in hit position at z partitions with the electron-pair events. The measured time-of-flight's and their covariance matrices are subjected to a correlation analysis algorithm which is developed for BESIII to combine the independent measurements with common errors. Monte Carlo studies show that the correlated analysis can provide more reliable TOF information on particle identification.

References

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HU Ji-Feng, HE Kang-Lin, ZHANG Zi-Ping, BIAN Jian-Ming, CAO Guo-Fu, DENG Zi-Yan, HE Miao, HUANG Bin, JI Xiao-Bin, LI Gang, LI Hai-Bo, LI Wei-Dong, LIU Chun-, Correlation Analysis in Time-of-Flight Calibration of BESⅢ[J]. Chinese Physics C, 2007, 31(10): 893-899.

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Received: 2007-01-04
Revised: 2007-01-16

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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

Correlation Analysis in Time-of-Flight Calibration of BESⅢ

Corresponding author: HE Kang-Lin,

Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China2 Institute of High Energy Physics, CAS, Beijing 100049, China3 Graduate University of Chinese Academy of Sciences, Beijing 100049, China4 CCASTWorld Laboratory, Beijing 100080, China5 Peking University, Beijing 100871, China6 Hunan University, Changsha 410082, China7 Shandong University, Ji'nan 250100, China

Received Date: 2007-01-04

Accepted Date: 2007-01-16

Available Online: 2007-10-05

Abstract: The errors and correlations of BESIII TOF measurements are carefully checked in hit position at z partitions with the electron-pair events. The measured time-of-flight's and their covariance matrices are subjected to a correlation analysis algorithm which is developed for BESIII to combine the independent measurements with common errors. Monte Carlo studies show that the correlated analysis can provide more reliable TOF information on particle identification.

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Correlation Analysis in Time-of-Flight Calibration of BESⅢ

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