中性top-pion的产生和衰变  

Production and Decay of the Neutral Top-Pion in High Energy e^+e^- Colliders

作　　者：岳崇兴[1] 徐庆君[1] 柳国丽[1] 

机构地区：[1]河南师范大学物理与信息工程学院,新乡453002

出　　处：《高能物理与核物理》2002年第7期672-677,共6页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金 ( 1 990 5 0 0 4 );河南省杰出青年基金 ( 991 1 );河南省教育厅资助~~

摘　　要：研究了顶色辅助的人工色 (TC2 )理论预言的中性top pionπ0t 的产生和衰变 .结果表明 :在高能正负电子对撞 (LC)实验中 ,通过e+e- →γπ0t 和e+e- →Zπ0t过程可以产生大量的π0t 粒子 ,通过e+e- →γπ0t→γ tc和e+e- →π0tZ→ tcZ过程可以探测中性top pionπ0tWe study the production and decay of the neutral top-pion π0t in topcolor-assisted technicolor (TC2) theory. Our results show that, except for the dominant decay modes bb over-bar , t over-bar c and gg, the π0t can also decay into γγ and Zγ modes. It can be significantly produced at high energy linear e+ e- collider (LC) experiments via the processes e+ e-->π0tγ and e+ e-->Zπ0t. We further calculate the production cross sections of the processes e+ e-->γπ0t->γt over-bar c and e+ e-->Zπ0t->Zt over-bar c. We find that the signatures of the neutral top-pion π0t can be detected via these processes.

关 键 词：产生 衰变 TOP-PION 产生截面 粒子 物理 

分 类 号：O571.3[理学—粒子物理与原子核物理]