【摘要】 在北京ＢＥＰＣ正负电子对撞机的ＢＥＳ谱仪实验中，进行了利用最小χ２ 方法对ｅ、μ、π、Ｋ粒子的鉴别的研究． 给出了这四类粒子动量在５００ ＭｅＶ到１ ６００ ＭｅＶ之间满意的鉴别效率和误判率．更多还原

【Abstract】 The application of least χ 2 method to the identification of e, μ, π, K particles by calculating their covariance matrices in BES experiment is discussed. The application gives satisfactory identification efficiency and background level for particles with momentum in the range from 500 MeV to 1 600 MeV.更多还原