摘要
利用BESⅢ的离线软件系统模拟τ轻子对在其产生阈处衰变到包含eμ和eπ子的末态;借助粒子鉴别软件对衰变末态进行筛选,得到相应的探测效率及本底比率,由此估算出相应于特定统计误差精度要求的数据获取时间。
The decays of τ lepton to eμ and en final states at the -c-pair production threshold are studied based on BESⅢ simulation system. The signal particles are selected with the help of the speciial particle identification software. Obtained are both selection efficiency and background proportion, by virtue of the former, the data taking time is estimated for the certain precision requirementon the branching ratio measurement.
出处
《核电子学与探测技术》
CAS
CSCD
北大核心
2009年第5期1081-1087,共7页
Nuclear Electronics & Detection Technology
基金
国家自然科学基金(10491300,10491303,10735080)
中国科学院重大科研装备研制项目(H7292330S7)
中国科学院百人计划(U-25,U-54,U-612)资助
关键词
τ阈值
eμ和eπ末态
分支比
模拟研究
τ threshold, eμand eπ final states, branching ratio, Monte Carlo study