二次判别函数应用于 PHENIX 的 π-μ 粒子鉴别

PION MUON DISCRIMINANT ANALYSIS WITH QUADRATIC FUNCTION

通过分析π介子与μ子穿过介质时的特性，选择了７个参数作为判别变量。利用改进后的二次判别函数，获得了在保持约７９％的μ子时，可将π介子抑制至１．６×１０－３量级。这一结果已达目前ＰＨＥＮＩＸ探测器设计条件下π－μ粒子鉴别的极限。

By analyzing the behavior of pions and muons travelling through mediums, seven discriminant parameters are chosen. By using improved quadratic discriminant function, the pions are supressed to 1 6×10 -3 while about 79% muons remain. This result has reached the pion muon discriminant limit for the present design of the PHENIX muon detector.