Top Decay in Topcolor-Assisted Technicolor

الأصل · EN

Conventional technicolor models with light charged technipions (π± ₜ) lead to an unacceptably large contribution to t π+ₜ b decay rate. Topcolor-assisted technicolor models also have additional PGBs called top-pions (π±ₜ) which may contribute to this decay. We study the potentially dangerous mixing of charged top-pion and technipions in toy models of `natural' topcolor-assisted technicolor. We find that the t π+ₜ,ₜ b decay rate in such models can be within experimental limits due to a combination of heavy top-pion and small πₜ - πₜ mixing.