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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. BES0 Design Report. Interior Document in Institute of High Energy Physics, 20042. Harris F A (BES Collab.). arXiv:physics/06060593. JIANG Lin-Li. P.H.D Thesis, University of Sciences and Technology, 2006(in Chinese) (蒋林立.中国科学技术大学博士论文，2006)4. Jadach S et al. Comput. Phys. Commun., 1992, 70: 3055. Agostinelli S et al (Geant4 Collab.). Nucl. Instrum. Meth-ods, 2003, A506: 2506. DENG Zi-Yan et al. HEP NP, 2006, 30(5): 371-377(in Chinese)(邓r艳等.高能物理与核物理，2006, 30(5): 371-377)7. LI Wei-Dong, LIU Huai-Min et al. The Offine Software for the BES0 Experiment. Proceeding of CHEP06. Mumbai,India, 2006 8. RONG Gang et al. HEP NP, 2001, 25: 154(in Chinese) (荣刚等.高能物理与核物理，2001, 25: 154)9. Birks J B. Proc. Phys. Soc., 1951, A64:29510. Craun R L, Smith D L. Nucl. Instrum. Methods, 1970, 80:239-24411. LIU Fang, HE Kang-Lin et al. HEP NP, 2005, 29(8):781-786(in Chinese)(刘芳，何康林等.高能物理与核物理，2005, 29(8): 781-786)12. SUN Sheng-Sen, HE Kang-Lin et al. HEP NP, 2005,29(2): 162-167(in Chinese) (孙胜森，何康林等.高能物理与核物理，2005, 29(2): 162-167)13. SUN Yong-Zhao, HE Kang-Lin et al. HEP NP, 2007,31(5): 423(in Chinese)(孙永昭，何康林等.高能物理与核物理，2007, 31(5):423)

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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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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.