Reconstruction of Photon Conversions and Precise Measurement of Photon Energy at BESⅡ

ZHANG Chang-Chun; WANG Zhe; YUAN Ye

Chinese Physics C> 2006, Vol. 30> Issue(5) : 378-386

Reconstruction of Photon Conversions and Precise Measurement of Photon Energy at BESⅡ

Institute of High Energy Physics, CAS, Beijing 100049, China2 Department of Technical Physics, Peking University, Beijing 100871, China3 Department of Engineering Physics, Tsinghua University, Beijing 100084, China

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Abstract：
Using Monte Carlo simulation, reconstruction of photon conversions is studied, and the detection efficiency and energy resolution as a function of photon energy are obtained.The dE/dx correction for the electrons from photon conversions and the energy scale for the photons are calibrated with BESⅡ data. An improved Crystal Ball function describes well the energy distribution of the photons. Photon energy resolutions in the range from 2.3 to 3.8MeV are found for the photons with energy from 100 to 260MeV at the BESⅡ~detector.

References

[1]

. Athar S B et al(CLEO Collab.). Phys. Rev., 2004, D70:1120022. Ablikim M et al(BES Collab.). Phys. Rev., 2005, D71:0920023. Ablikim M et al(BES Collab.). Nucl. Instrum. and Meth-ods, 2005, A552: 3444. BAI J Z et al(BES Collab.). Nucl. Instrum. and Methods,1994, A344: 319; Nucl. Instrum. Methods, 2001, A458:6275. HONG T et al. HEP NP, 2001, 25: 607 (in Chinese)(洪涛等.高能物理与核物理,2001, 25: 607)6. Eidelman S et al(Particle Data Group). Phys. Lett., 2004,B592: 17. A Correction Factor s = 0:9975 ± 0:0007 for Magnetic Field at the BES/ is Determined with Mass Measurement of the J/#936; Reconstructed from #936; (2S)#8594; π+ π- J/#936; and J/#936; )#8594; μ+ μ- Decays.8. Karl G, Meshkov S, Rosner J L. Phys. Rev., 1976, D13:1203; LIU Feng. PhD thesis, #936;' Hadronic Decays Involv-ing ω and #936;, and Polarization of #936;' #8594; Xc Decays. IHEP,Academy of Chinese Sciences, Beijing, April 20009. Brock I C. A Fitting and Plotting Package Using MINUIT,Version 4.07. Dec. 22th, 2000

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[2]	WANG Ya-Ping , CAI Xu . Simulation Studies on the Trigger Decision Criterion of Photon Spectrometer in ALICE Experiment. Chinese Physics C, 2006, 30(7): 606-611.
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[5]	ZENG Yu , MAO Ze-Pu . Research on the Software of Track Reconstruction in Vertex Chamber of BESⅡ. Chinese Physics C, 2003, 27(9): 808-812.
[6]	WANG Jun , LV Feng , TONG Guo-Liang , ZHANG Chang-Chun , HONG Tao , YUAN Jian-Ming , XU Ye . Study of Neutral Track Measurement at BESⅡ. Chinese Physics C, 2002, 26(2): 116-121.
[7]	HU Hai-Ming , QI Xiang-Rong , HUANG Guang-Shun , ZHAO Zheng-Guo . Initial State Radiative Correction in R Measurement at BES. Chinese Physics C, 2001, 25(8): 701-709.
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[10]	Li Haibo , Yuan Changzheng , Li Jin , Li Xinhua . Study of Neutral Track Measurement at BES. Chinese Physics C, 1999, 23(7): 607-615.
[11]	Zhao Haiwen , Wang Taijie , Mao Zepu , Li Jin , Liu Hongtao , Li Weiguo , Yan Wuguang , Chen Guangpei , Liu Jing , Li Peiqin , Rong Gang , Yuan Ye . Track Reconstruction in BES Barrel Shower Counter. Chinese Physics C, 1999, 23(9): 846-853.
[12]	Liu Jing , Mao Zepu , Li Weiguo , Zhang Changchun , Chen Guangpei , Yan Wugung , Li Peiqin , Rong Gang , Zhao Haiwen , Xie Yu . A New Method of Track Finding and Fitting in Main Drift Chamber of BES-Ⅱ. Chinese Physics C, 1998, 22(7): 587-595.
[13]	Chen Guangpei , Yuan Ye , Mao Zepu , Bai Jinzhi , Sun Hansheng , Liu Jing , Li Weiguo , Zhang Changchun , Yan Wuguang , Li Peiqin , Qiu Jinfa , Yang Jie , Yang Chunmin , Rong Gang , Zhen Jianping , Zhao Haiwen , Zhao Meng , Xie Yu . Track Reconstruction in Vertex Chamber of BES-Ⅱ. Chinese Physics C, 1998, 22(11): 982-989.
[14]	BES Collaboration . Measurements of the Branching Ratios for the Decays J/ψ→γπ⁰,γη, γη'→ 3γ at BES. Chinese Physics C, 1997, 21(5): 385-392.
[15]	Han Jiaxiang , Xu Zizong , Chen Hongfang , Li Cheng , Zeng Hui . Single Photon Time Spectra in Gas Avalanches. Chinese Physics C, 1996, 20(10): 885-889.
[16]	Yu Zhongqiang , Zhao Dixin , Gu Jianhui , Guo Yanan , Zhang Bingyun , Ding Huiliang , Li Weidong . Trigger Efficiency Measurement of BES. Chinese Physics C, 1995, 19(12): 1062-1067.
[17]	MAO Ze-Pu , WANG Tai-Jie , WANG Shu-Qin , LI Wei-Guo , CHEN Guo-Ming . Track Reconstruction of the BES Main Drift Chamber. Chinese Physics C, 1993, 17(3): 193-201.
[18]	ZHANG Ge , ZHU Shan-Gen , ZHOU Yong-Shen , ZHAO Meng , ZHAO Di-Xin , LI Jia , HAN Shi-Wen , FU Zheng-Shan . Magnetic Axis Measurement in the Solenoid of Beijing Spectrometer. Chinese Physics C, 1991, 15(3): 200-206.
[19]	ZHANG Chang-Chun . RECENT MEASUREMENTS OF TWO PHOTON MUON PAIR PROCESS FROM MARK J. Chinese Physics C, 1986, 10(4): 400-411.
[20]	LI SHI , WANG KE-BIN , TANG XIAO-WEI . THE PRECISION MEASUREMENT OF THE ENERGY OF THE SURVIVAL PHOTON PASSED THROUGH A MEDIUM. Chinese Physics C, 1981, 5(5): 628-630.

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ZHANG Chang-Chun, WANG Zhe and YUAN Ye. Reconstruction of Photon Conversions and Precise Measurement of Photon Energy at BESⅡ[J]. Chinese Physics C, 2006, 30(5): 378-386.

ZHANG Chang-Chun, WANG Zhe and YUAN Ye. Reconstruction of Photon Conversions and Precise Measurement of Photon Energy at BESⅡ[J]. Chinese Physics C, 2006, 30(5): 378-386. shu

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Received: 2005-09-09
Revised: 2006-01-05

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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

Reconstruction of Photon Conversions and Precise Measurement of Photon Energy at BESⅡ

Corresponding author: ZHANG Chang-Chun,

Institute of High Energy Physics, CAS, Beijing 100049, China2 Department of Technical Physics, Peking University, Beijing 100871, China3 Department of Engineering Physics, Tsinghua University, Beijing 100084, China

Received Date: 2005-09-09

Accepted Date: 2006-01-05

Available Online: 2006-05-05

Abstract: Using Monte Carlo simulation, reconstruction of photon conversions is studied, and the detection efficiency and energy resolution as a function of photon energy are obtained.The dE/dx correction for the electrons from photon conversions and the energy scale for the photons are calibrated with BESⅡ data. An improved Crystal Ball function describes well the energy distribution of the photons. Photon energy resolutions in the range from 2.3 to 3.8MeV are found for the photons with energy from 100 to 260MeV at the BESⅡ~detector.

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Reconstruction of Photon Conversions and Precise Measurement of Photon Energy at BESⅡ

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