高能~e+e^-对撞机上top介子辅助的b夸克对产生  

Associate Production of the top-Pion with b Quark Pair in TC2 Model at High Energy e+e- Colliders

作　　者：黄金书[1] 潘群娜[1] 宋太平[1] 吕林霞[1] 

机构地区：[1]河南南阳师范学院物理系,南阳473061

出　　处：《高能物理与核物理》2003年第7期567-570,共4页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金;河南省教育厅自然科学基金资助~~

摘　　要：在顶色辅助的人工色模型下计算了高能e+ e-对撞机上top介子辅助的b夸克对产生过程e+ e-→bbπ0t 的产生截面 .发现在一定的参数范围内 ,这个过程的产生截面大于 10fb ,比标准模型下标量Higgs粒子辅助的b夸克对产生过程大许多 ,与最小超对称模型下标量和赝标量Higgs粒子h0 ,H0 ,A0 的相应产生截面大致相当 .人工色理论的信息可能在下一代正负电子对撞实验中探测到 .In this paper we investigate the production of top-pion π0 t of the topcolor assisted technicolor (TC2) model with b quark pair at e+e- colliders. We find that the cross section of the process e+e-→b bπ0 t is larger than that of e+e-→b bH0 in the standard model,and is approximately the same as that of the process e+e-→b bh0(b bH0,b bA0)in the minimal supersymmetric model. With reasonable values of the parameter,the cross section can reach 10fb. The neutral top-pion π0 t may be observed directly via this process at the next linear colliders.

关 键 词：高能物理 顶色辅助 人工色模型 top介子 b夸克 产生截面 对撞机 

分 类 号：O572.33[理学—粒子物理与原子核物理]