期刊论文

Li, HH

中文

中国物理C

1674-1137

2003

27

8

659-664

10.3321/j.issn:0254-3052.2003.08.002

国家自然科学基金（19991480,19825116,19805009）； 中国科学院重大项目（KJ95T-03）； ***计划经费（u-25）；

本校为第一且通讯机构

以北京谱仪(BES)上常用的3种粒子鉴别方法为基础,充分利用BESⅡ所获取的R值扫描、J/ψ和ψ'数据中p,(p-)以及其他带电粒子样本,对动量范围在0.3-1.2GeV的p和p-鉴别方法进行分析研究.找到BES Ⅱ上p和(p-)的最佳鉴别方法:动量低于0.6GeV只用dE/dx实现粒子鉴别,动量高于0.6GeV可用TOF或联合鉴别的方法,并给出p,(p-)的鉴别效率以及本底的混入比例.

Based on three methods of particle identification(PID) of BES, we study the identification of p and (p) over bar in momentum range from 0.3 to 1.2 GeV using real particle samples of e, mu, pi, K, p and (p) over bar which were collected in 2-5GeV R scan, J/phi and phi' data taking periods. The paper presents the optimized method of PID:p((p) over bar) 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) over bar and co...