Author/Authors :
Chongxing Yue، نويسنده , , Gongru Lu، نويسنده , , Qingjun Xu، نويسنده , , Guoli Liu، نويسنده , , Guangping Gao، نويسنده ,
Abstract :
In the framework of topcolor-assisted technicolor (TC2) theory, we calculate the contributions of the scalars (the neutral top-pion πt0 and the top-Higgs ht0) to the flavor-changing rare top decays t→cVV (V=W,g, γ or Z). Our results show that ht0 can enhance the standard model BrSM(t→cWW) by several orders of magnitude for most of the parameter space. The peak of the branching ratio resonance emerges when the top-Higgs mass is between 2mW and mt. The branching ratio Br(t→cWW) can reach 10−3 in the narrow range.
