p,在北京谱仪(Ⅱ)中的行为研究

Performance Study of p, in BES Ⅱ Detector

从MonteCalor模拟和北京谱仪 (BESⅡ )所取的实验数据入手 ,分析了p和 p产生次级带电径迹和中性径迹的几率以及好径迹选择条件对这些次级径迹的去除情况、p在探测器中的能量损失和 p的湮没、p和 p在桶部簇射计数器中沉积能量的分布以及 3种不同的粒子鉴别方法的优劣 .给出了BES目前可以正确重建出的p和 p的动量的最小值和利用TOF和dE dx的联合信息鉴别p和 p的优越性 .

Based on the Monte Carlo simulation and J/ψ data of BES Ⅱ, the performance of p and in BES detector is studied, which includes the criteria for removing the secondary charged tracks and fake photons produced by the annihilation of with the materials, the energy loss and deposited energy of p and in BSC, as well as the minimum p and momentum which can be reconstructed correctly, The combined TOF and dE/dxinformation is suggested to be used for p and identification.