Studies of d<EM>E</EM>/d<EM>x</EM> measurements with the BESⅢ

CAO Xue-Xiang; LI Wei-Dong; Roy A; LIU Chun-Lei; MAO Ze-Pu; CHEN Shen-Jian; DENG Zi-Yan; HE Kang-Lin; HUANG Xing-Tao; HUANG Bin; HUANG Yan-Ping; JIA Lu-Kui; JI Xiao-Bin; LI Xiu-Rong; LIU Chun-Yan; LIU Huai-Min; MA Qiu-Mei; MA Xiang; QIU Jin-Fa; WANG Da-Yong; WU Ling-Hui; WU Zhi; YUAN Ye; ZHANG Xue-Yao; ZHAO Chuan; ZHANG Yao; ZOU Jia-Heng

Chinese Physics C> 2010, Vol. 34> Issue(12) : 1852-1859

Studies of dE/dx measurements with the BESⅢ

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Abstract：
The Beijing Spectrometer Ⅲ (BESⅢ) is a general-purpose detector used for the study of τ-charm physics at the Beijing Electron-Positron Collider Ⅱ (BEPCⅡ). This paper presents our studies of the dE/dx measurement in the drift chamber of BESⅢ, which is important for the identification of charged particles. Corrections applied to the dE/dx measurement in data reconstruction are discussed. After our current dE/dx calibration, a resolution of about 6% has been obtained for minimum ionization particles, and a 3σ K/π separation is obtained for momenta up to 760 MeV/c. These results meet the design goals of the BESⅢ drift chamber.

References

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CAO Xue-Xiang, LI Wei-Dong, Roy A, LIU Chun-Lei, MAO Ze-Pu, CHEN Shen-Jian, DENG Zi-Yan, HE Kang-Lin, HUANG Xing-Tao, HUANG Bin, HUANG Yan-Ping, JIA Lu-Kui, JI Xiao-Bin, LI Xiu-Rong, LIU Chun-Yan, LIU Huai-Min, MA Qiu-Mei, MA Xiang, QIU Jin-Fa, WANG Da-Yong, WU Ling-Hui, WU Zhi, YUAN Ye, ZHANG Xue-Yao, ZHAO Chuan, ZHANG Yao and ZOU Jia-Heng. Studies of dE/dx measurements with the BESⅢ[J]. Chinese Physics C, 2010, 34(12): 1852-1859.

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Received: 2010-03-03
Revised: 2010-04-12

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沈阳化工大学材料科学与工程学院沈阳 110142

Studies of dE/dx measurements with the BESⅢ

Corresponding author: CAO Xue-Xiang,

Received Date: 2010-03-03

Accepted Date: 2010-04-12

Available Online: 2010-12-05

Abstract: The Beijing Spectrometer Ⅲ (BESⅢ) is a general-purpose detector used for the study of τ-charm physics at the Beijing Electron-Positron Collider Ⅱ (BEPCⅡ). This paper presents our studies of the dE/dx measurement in the drift chamber of BESⅢ, which is important for the identification of charged particles. Corrections applied to the dE/dx measurement in data reconstruction are discussed. After our current dE/dx calibration, a resolution of about 6% has been obtained for minimum ionization particles, and a 3σ K/π separation is obtained for momenta up to 760 MeV/c. These results meet the design goals of the BESⅢ drift chamber.

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Studies of dE/dx measurements with the BESⅢ

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Studies of dE/dx measurements with the BESⅢ

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