Study of the p and p Identification at BES Ⅱ

LI Hui-Hong; LIU Feng; LI Jin; YUAN Chang-Zheng; WANG Zhi-Yong

Chinese Physics C> 2003, Vol. 27> Issue(8) : 659-664

Study of the p and p Identification at BES Ⅱ

Institute of Particle Physics, Hua Zhong Normal University, Wuhan 430079, China2 Institute of High Energy Physics, CAS, Beijing 100039, China3 China Center of Advanced Science and Technology,Beijing 100080,China

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Abstract：
Based on three methods of particle identification (PID) of BES,we study the identification of p and p in momentum range from 0.3 to 1.2 GeV using real particle samples of e,μ,π,K,p and p which were collected in 2-5GeV R scan,J/(ψ) and ψ′ data taking periods. The paper presents the optimized method of PID:p(p) is identified by dE/dx only if momentum below 0.6GeV,and by TOF or the combination of dE/dx and TOF for higher momentum.The PID efficiency of p, p and contamination from the other charged particles are also given.

References

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BAI Jing-Zhi et al.Phys.Rev.Lett.,2002,88:1018022 YUAN Chang-Zheng. Study of Selected Topics in #964;-Charm Energy Region. Postdoctorial Report.1999,283 LI Hui-Hong.The 10th RES Annual Meeting,2001，1734 Sternheimer R M,Peterls R E.Phys.Rev.，1971,3:36815 RONG Gang et al. HEP NP,1996.20:577(in Chinese)(荣刚等.高能物理与核物理，1996 , 211: 577)

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LI Hui-Hong, LIU Feng, LI Jin, YUAN Chang-Zheng and WANG Zhi-Yong. Study of the p and p Identification at BES Ⅱ[J]. Chinese Physics C, 2003, 27(8): 659-664.

LI Hui-Hong, LIU Feng, LI Jin, YUAN Chang-Zheng and WANG Zhi-Yong. Study of the p and p Identification at BES Ⅱ[J]. Chinese Physics C, 2003, 27(8): 659-664. shu

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Received: 2002-12-17
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 the p and p Identification at BES Ⅱ

Corresponding author: LI Hui-Hong,

Institute of Particle Physics, Hua Zhong Normal University, Wuhan 430079, China2 Institute of High Energy Physics, CAS, Beijing 100039, China3 China Center of Advanced Science and Technology,Beijing 100080,China

Received Date: 2002-12-17
Accepted Date: 1900-01-01
Available Online: 2003-08-05

Abstract: Based on three methods of particle identification (PID) of BES,we study the identification of p and p in momentum range from 0.3 to 1.2 GeV using real particle samples of e,μ,π,K,p and p which were collected in 2-5GeV R scan,J/(ψ) and ψ′ data taking periods. The paper presents the optimized method of PID:p(p) is identified by dE/dx only if momentum below 0.6GeV,and by TOF or the combination of dE/dx and TOF for higher momentum.The PID efficiency of p, p and contamination from the other charged particles are also given.