Study of Neutral Track Measurement at BESⅡ

WANG Jun; LV Feng; TONG Guo-Liang; ZHANG Chang-Chun; HONG Tao; YUAN Jian-Ming; XU Ye

Chinese Physics C> 2002, Vol. 26> Issue(2) : 116-121

Study of Neutral Track Measurement at BESⅡ

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

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Abstract：
The measurement errors of the deposited energy and position of neutral tracks in Barrel Shower Counter (BSC) of BESⅡ are investigated. The errors of energy and position of real data are determined by radiative Bhabha events, while the errors of Monte Carlo Data are determined by e⁺e^－→γγ events. Then the corrections are tested by the selected ρπ sample, which shows better pull and Confidence Level distribution after the correction. The results are already applied to the kinematic fitting, which can improve the physics results at BESⅡ.

References

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[1]	ZHANG Chang-Chun , WANG Zhe , YUAN Ye . Reconstruction of Photon Conversions and Precise Measurement of Photon Energy at BESⅡ. Chinese Physics C, 2006, 30(5): 378-386.
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WANG Jun, LV Feng, TONG Guo-Liang, ZHANG Chang-Chun, HONG Tao, YUAN Jian-Ming and XU Ye. Study of Neutral Track Measurement at BESⅡ[J]. Chinese Physics C, 2002, 26(2): 116-121.

WANG Jun, LV Feng, TONG Guo-Liang, ZHANG Chang-Chun, HONG Tao, YUAN Jian-Ming and XU Ye. Study of Neutral Track Measurement at BESⅡ[J]. Chinese Physics C, 2002, 26(2): 116-121. shu

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Received: 2001-03-14
Revised: 1900-01-01

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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

Study of Neutral Track Measurement at BESⅡ

Corresponding author: WANG Jun,

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

Received Date: 2001-03-14

Accepted Date: 1900-01-01

Available Online: 2002-02-05

Abstract: The measurement errors of the deposited energy and position of neutral tracks in Barrel Shower Counter (BSC) of BESⅡ are investigated. The errors of energy and position of real data are determined by radiative Bhabha events, while the errors of Monte Carlo Data are determined by e⁺e^－→γγ events. Then the corrections are tested by the selected ρπ sample, which shows better pull and Confidence Level distribution after the correction. The results are already applied to the kinematic fitting, which can improve the physics results at BESⅡ.

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Study of Neutral Track Measurement at BESⅡ

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