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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.
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. shu
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Received: 2010-03-03
Revised: 2010-04-12
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Studies of dE/dx measurements with the BESⅢ

    Corresponding author: CAO Xue-Xiang,

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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