Tuning and Validation of the Lundcharm Model with J/ψ Decays  

作　　者：杨蕊玲 平荣刚 陈洪 

机构地区：[1]School of Physical Science and Technology, Southwest University, Chongqing 400715 [2]Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049

出　　处：《Chinese Physics Letters》2014年第6期55-58,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grand Nos 11079038, 11235011, 11375205, and 11175146.

摘　　要：Using J/ψ decays collected with the BES Ⅲ detector, Lundcharm model parameters are optimized with J/ψlight hadron decays. The dependence of the response function on model parameters is approximated up to the quadratic term, and the model parameters are optimized by simultaneously fitting J/ψ inclusive charged track distributions and event shapes. The Monte Carlo simulations show that optimal parameters yield satisfactory MC distributions as compared to both the J/ψ and ψ（2S） data distributions. These optimal values are suggested for the Lundcharm model to produce J/ψ and ψ（2S） decays to light hadrons.Using J/ψ decays collected with the BES Ⅲ detector, Lundcharm model parameters are optimized with J/ψlight hadron decays. The dependence of the response function on model parameters is approximated up to the quadratic term, and the model parameters are optimized by simultaneously fitting J/ψ inclusive charged track distributions and event shapes. The Monte Carlo simulations show that optimal parameters yield satisfactory MC distributions as compared to both the J/ψ and ψ（2S） data distributions. These optimal values are suggested for the Lundcharm model to produce J/ψ and ψ（2S） decays to light hadrons.

分 类 号：TP273.4[自动化与计算机技术—检测技术与自动化装置] O572.243[自动化与计算机技术—控制科学与工程]