摘要
选取辐射Bhabha样本 ,研究了北京谱仪Ⅱ (BESⅡ )桶部簇射计数器 (BSC)对中性径迹的沉积能量和空间位置的测量 ,定出了实际数据的测量误差 .并利用MonteCarlo产生的e+e- →γγ事例定出MC数据的能量及位置测量误差 .结果已用于BESⅡ运动学拟合 ,能改善物理分析结果 .
The measurement errors of the deposited energy and position of neutral tracks in Barrel Shower Counter (BSC) of BESⅡ are investigated. The errors of energy and position of real data are determined by radiative Bhabha events, while the errors of Monte Carlo Data are determined by e +e -→γγ events. Then the corrections are tested by the selected ρπ sample, which shows better pull and Confidence Level distribution after the correction. The results are already applied to the kinematic fitting, which can improve the physics results at BESⅡ.
出处
《高能物理与核物理》
CSCD
北大核心
2002年第2期116-121,共6页
High Energy Physics and Nuclear Physics
基金
国家自然科学基金 ( 1 9991 4 80 )
中国科学院重大及特别支持项目 (KJ95T -0 3)资助~~
