Study of Neutral Track Measurement at BES

Li Haibo; Yuan Changzheng; Li Jin; Li Xinhua

Chinese Physics C> 1999, Vol. 23> Issue(7) : 607-615

Study of Neutral Track Measurement at BES

Institute of High Energy Physics, The Chinese Academy of Sciences, Beijing 100039

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Abstract：
The accuracy of neutral track measurement by Barrel Shower Counter (BSC) at BES is inveshgated. The photon energy in BSC is corrected using radiative Bhabha events and the error is determined. The error of photon position in BSC is also determined using the e⁺e^－ process. All these results can be applied to BES analysis including neutral tracks, and the systematic error can be remarkably reduced when the kinematic fit is adopted.

References

[1]

BES Collab. Nucl. Instr. Math., 1994, A344:3192 Zhu Yongseng. Probability and Statistics in Experimental Physics. Beijing: Academic Press, 1991(朱永生,实验物理中的概率和统计.北京:科学出版社,1991)3 Mao Zepu et al. High Energy Phys. and Nucl. Phys. (in Chinese), 1993, 17: 193(毛泽普等,高能物理与核物理,1993,17:193) 4 Yuan C Z. BES Analysis Note, 1998, March 5 Berends F A, Gasrman K Nucl. Phys., 1973, B61:414; Harris I, Brown L M. Phys. Rev., 1957, 105: 1656;Eidelman S I, Kuraev E A. NucI. Phys., 1978, B143: 3536 Berends F A, Kleiss R NucI. Phys., 1981, B186:227 Cul X Z. BES Analysis Note, 1998, June 8 Li H B. Study of Ψ(2S)→γπ0π0 Decay, BES Analysis Note, 1998, May

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Li Haibo, Yuan Changzheng, Li Jin and Li Xinhua. Study of Neutral Track Measurement at BES[J]. Chinese Physics C, 1999, 23(7): 607-615.

Li Haibo, Yuan Changzheng, Li Jin and Li Xinhua. Study of Neutral Track Measurement at BES[J]. Chinese Physics C, 1999, 23(7): 607-615. shu

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Received: 1998-05-13
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

Study of Neutral Track Measurement at BES

Corresponding author: Li Haibo,

Institute of High Energy Physics, The Chinese Academy of Sciences, Beijing 100039

Received Date: 1998-05-13
Accepted Date: 1900-01-01
Available Online: 1999-07-05

Abstract: The accuracy of neutral track measurement by Barrel Shower Counter (BSC) at BES is inveshgated. The photon energy in BSC is corrected using radiative Bhabha events and the error is determined. The error of photon position in BSC is also determined using the e⁺e^－ process. All these results can be applied to BES analysis including neutral tracks, and the systematic error can be remarkably reduced when the kinematic fit is adopted.