Improvement of main drift chamber Monte-Carlo tuning model at BESⅢ

• 作 者: 张瑞 肖栋 安芬芬 高原宁 何康林 季晓斌 金山 李卫东 李卫国 刘怀民 刘凯 沈肖雁 王贻芳 伍灵慧 徐庆年 袁野 张瑶 赵光 郑阳恒
• 机 构: University of Chinese Academy of Sciences,Institute of High Energy Physics, Chinese Academy of Scien
• 出 处: Chinese Physics C
• 发表日期: 2014年02期
• 关键词: drift chamber tuning momentum checking proton separately BEPC fitting reconstruc

Based on real data,a new parameterized model of the main drift chamber response is proposed.In this model,we tune the ratio of good hits and the residual distribution separately.By data quality checking,the diference between simulation and data in track reconstruction efciency reduces from 1%to 0.5%averagely for the pion in J/ψ→π+ππ0,and the momentum resolution agreement improves significantly for the proton in J/ψ→ppˉ.

Based on real data, a new parameterized model of the main drift chamber response is proposed. In this model, we tune the ratio of good hits and the residual distribution separately ..By data quality checking, the diference between simulation and data in track reconstruction efciency reduces from 1% to 0.5% averagely for the pion in J / ψ → π + ππ0, and the momentum resolution agreement significantly for the proton in J / ψ → ppˉ.