Kinematics of τ two-body decay near τ threshold at BESⅢ  

作　　者：莫晓虎 

机构地区：[1]Institute of High Energy Physics,CAS

出　　处：《Chinese Physics C》2010年第11期1671-1679,共9页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (10491303, 10775412, 10825524, 10935008);Instrument Developing Project of Chinese Academy of Sciences (YZ200713);Major State Basic Research Development Program (2009CB825206);Knowledge Innovation Project of Chinese Academy of Sciences (KJCX2-YW-N29)

摘　　要：The kinematic properties of two-body decay near τ threshold are studied according to the special capacity of the BEPC accelerator and the BESⅢ detector.Explicitly presented are the transformations of energy and momentum of hadronic particles between different reference frames,and the corresponding distributions.A brand new method is proposed to obtain the energy spread of the accelerator by fitting the energy distribution of hadron from τ semi-leptonic decays.The kinematic properties of two-body decay near τ threshold are studied according to the special capacity of the BEPC accelerator and the BESⅢ detector.Explicitly presented are the transformations of energy and momentum of hadronic particles between different reference frames,and the corresponding distributions.A brand new method is proposed to obtain the energy spread of the accelerator by fitting the energy distribution of hadron from τ semi-leptonic decays.

关 键 词：KINEMATICS τ threshold energy distribution energy spread 

分 类 号：O572.214[理学—粒子物理与原子核物理]