广西师范大学学报（自然科学版）2016，Vol.34Issue(3)：1-6,6.DOI:10.16088/j.issn.1001-6600.2016.03.001
BES III上J/ψ→γηc→γϕϕ的蒙特卡罗模拟
The Monte Carlo Simulation of J/ψ→γηc→γϕϕat BES III
摘要
Abstract
The Monte Carlo simulation of J/ψ→γηc→γϕϕis performed at the BES III offline software system.The final states of the decay channel are selected by comparing the inclusive Monte Carlo with the exclusive Monte Carlo,and the efficiency is 1 .5 times as that of BES II.The branching fraction ofηc→ϕϕobtained by this method is consistent with the input value of Monte Carlo within the statistical errors.2 144±26 events number ofηc→ϕϕcan be obtained when applying the procedure of the paper to the J/ψ data sample collected at BES III.A method of Helicity is used to calculate the angular distribution of all the particles in their mother frame,and the results are consistent with the fitting results of the exclusive Monte Carlo sample within the statistical errors.The result of this paper is meaningful for the high precision measurement of the channel and the data analysis at BES III experiment.关键词
分支比/蒙特卡罗模拟/螺旋度角分布Key words
branching fraction/Monte Carlo simulation/helicity angular distribution分类
数理科学引用本文复制引用
廖广睿,杨永栩..BES III上J/ψ→γηc→γϕϕ的蒙特卡罗模拟[J].广西师范大学学报（自然科学版）,2016,34(3):1-6,6.基金项目
国家自然科学基金资助项目(11505034) （11505034）
广西师范大学博士科研启动基金资助项目(17A4,17K) （17A4,17K）
