在顶色辅助的人工色(TC2)理论模型中,研究了树图下中性top—pion(πt^0)的衰变过程πt^0→bb^-,tt^-,tc^-和圈图下中性top—pion(πt^0)的衰变过程πt^0→gg,γγ,γz,通过对这些衰变过程的衰变分支比的计算,可以得到πt^0在树图下的主要衰变过程为πt^0→tt^-,tc^-,在圈图下的主要衰变过程为πt^0→gg.对于小质量的中性top-pion(πt^0),可以用πt^0→tc^-来探测;对于大质量的中性top—pion(πt^0),可以用πt^0→tt^-来探测.中性top—pion(πt^0)是TC2模型中的特征粒子,通过对这些过程的研究可为在将来的直线对撞机上探测top—pion(πt^0)的存在提供理论依据。以此来检验TC2理论的正确性.
In the framework of top-color assisted Technicolor (TC2) theory, we study the decay processes πt^0→bb^-,tt^-,tc^- and the decay processes of neutral top-pion at the loop of neutral top-pion at the tree level πt^0→gg,γγ,γz. The study shows that the main decay channels of neutral top-pion are the tree level mode: πt^0→tt^-,tc^- and the loop level mode: gg . When the mass of top-pion (πt^0) is small, we can use the πt^0→tc^- to detect it ; when the mass of top-pion ( πt^0) is large, we can use the πt^0→tt^- to detect it. The top-pion is the characteristic particle of TC2 theory, so the study provides us with the useful informations to search for neutral top-pion which can prove the correction of TC2 theory.