矩形截断方法在宇宙线粒子分辨中的应用

To Separate the Cosmic Ray Particles by Rectangular Cut

利用TMVA软件包所提供的矩形截断方法进行了多参量的分析,实现对γ和强子簇射的分辨.测试结果表明,利用上述方法,在对强子簇射的排斥率达到60%的条件下,对γ簇射的挑选率最高可达到85%.能有效地排除宇宙线中的强子成分,降低本底,提高γ射线观测的信噪比.

Rectangular cut is performed with TMVA （Toolkit for Multivariate Analysis） program to separate the -initiated and hadron-initiated showers. From the test, we found that the efficiency for selecting the y-initiated showers can reach 85% while rejecting more than 60% of the hadron-initiated showers. The γ/hadron separation is effective in y astronomy studies for ground based experiment..