| Kinematics of τ two-body decay near τ threshold at BESⅢ |
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| 作者姓名： | 莫晓虎 |
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| 作者单位： | Institute of High Energy Physics,CAS, Beijing 100049, China |
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| 基金项目： | 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） |
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| 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.
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| 关 键 词： | 半轻子衰变 北京谱仪 运动学 正负电子对撞机 门槛 运动特性 能量分布 加速器 |
| 收稿时间： | 2010-02-23 |
| 修稿时间： | 2010-03-24 |
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