• 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.
  • [1] CHAO Kuang-Ta,WANG Yi-Fang.Physics at BES-Ⅲ.In:Institute of High Energy Physics.International Journal of Modern Physics A,2009,24:1-21[2] Preliminary Design Report of The BESⅢ Detector,Jan,2004[3] WANG Ji-Ke et al.Chin.Phys.C(HEP NP),2009,33(10):870-8?9[4] LIU Jian-Bei.Experimental Study of the BESⅢ Drift Chamber Performance.2005(Ph.D.Thesis)(in Chinese)[5] Blum,Walter,Riegler et al.Particle Detection with Drift Chambers.Berlin Heidelberg:Springer,2008.331-359[6] Messel H,Ritson D M.Philos.Mag.,1950,41:1129-1132[7] Telnov A V.BABAR Analysis Document #1500,version 4,2006[8] Todyshev K.BABAR Analysis Document #1698,Version1,2007[9] Fortin D.BABAR Analysis Document #617,Version 1,2003[10] Dunn J W.Identified Particle Spectra from dE/dx Ionization Measurements in Pb+Pb Collisions at 158 A GeV/c.1997(Doctoral thesis)[11] Emi K,Tsukamoto T.Nucl.Instrum.Methods A,1996,379:225-231[12] Güther J.Particle Identification by dE/dx in the NA35 Time Projection Chamber,IKF-HENPG/8-94[13] Hauachild M.Nucl.Instrum.Methods A,1996,379:436-441[14] WANG Da-Yong.Track Fitting and dE/dx Offiine Software Development and Studies in BESⅢ.2006(Ph.D.Thesis)(in Chinese)[15] Deppe O.Measurment of D*± Electroproduction at HERA.1999(Doctoral thesis)[16] MA Yuan-Yuan,LIU Jian-Bei et al.High Energy Physics and Nuclear Phyics,2005,29(5):481-484(in Chinese)[17] Andronic A,Appelshuser H et al.Nucl.Instrum.Methods A,2004,525:447-457[18] MA Xiang et al.Chin.Phys.C(HEP NP),2008,32(9):744-749
  • [1] CHAO Kuang-Ta,WANG Yi-Fang.Physics at BES-Ⅲ.In:Institute of High Energy Physics.International Journal of Modern Physics A,2009,24:1-21[2] Preliminary Design Report of The BESⅢ Detector,Jan,2004[3] WANG Ji-Ke et al.Chin.Phys.C(HEP NP),2009,33(10):870-8?9[4] LIU Jian-Bei.Experimental Study of the BESⅢ Drift Chamber Performance.2005(Ph.D.Thesis)(in Chinese)[5] Blum,Walter,Riegler et al.Particle Detection with Drift Chambers.Berlin Heidelberg:Springer,2008.331-359[6] Messel H,Ritson D M.Philos.Mag.,1950,41:1129-1132[7] Telnov A V.BABAR Analysis Document #1500,version 4,2006[8] Todyshev K.BABAR Analysis Document #1698,Version1,2007[9] Fortin D.BABAR Analysis Document #617,Version 1,2003[10] Dunn J W.Identified Particle Spectra from dE/dx Ionization Measurements in Pb+Pb Collisions at 158 A GeV/c.1997(Doctoral thesis)[11] Emi K,Tsukamoto T.Nucl.Instrum.Methods A,1996,379:225-231[12] Güther J.Particle Identification by dE/dx in the NA35 Time Projection Chamber,IKF-HENPG/8-94[13] Hauachild M.Nucl.Instrum.Methods A,1996,379:436-441[14] WANG Da-Yong.Track Fitting and dE/dx Offiine Software Development and Studies in BESⅢ.2006(Ph.D.Thesis)(in Chinese)[15] Deppe O.Measurment of D*± Electroproduction at HERA.1999(Doctoral thesis)[16] MA Yuan-Yuan,LIU Jian-Bei et al.High Energy Physics and Nuclear Phyics,2005,29(5):481-484(in Chinese)[17] Andronic A,Appelshuser H et al.Nucl.Instrum.Methods A,2004,525:447-457[18] MA Xiang et al.Chin.Phys.C(HEP NP),2008,32(9):744-749
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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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