We calculate the contributions of the top-Higgs $h_{ t}^{ 0}$ predicted by topcolor assisted technicolor(TC2) models to $e^{ +}e^{ -}\longrightarrow \overline{ t}c\overline{ \nu}_{ e}\nu_{ e}$ and compare the results with the contributions of $h^{ 0}_{ t}$ to the processes $e^{ +}e^{ -}\longrightarrow Z h^{ 0}_{ t}\longrightarrow Z\overline{ t}c$ and $e^+e^-\longrightarrow \gamma h^{ 0}_{ t} \longrightarrow \gamma \overline{ t}c$. We find that $e^{ +}e^{ -} \longrightarrow\overline{ t}c\overline{ \nu}_{ e}\nu_{ e}$ is very sensitive to $h^{ 0}_{ t}$, which can be easy detected via this process at high-energy $e^{ +}e^{ -}$ collider(LC) experiments with $\sqrt{ s}\geq 500$ $GeV$, as long as its mass below the $\overline{ t}t$ threshold. The process $e^{ +}e^{ -} \longrightarrow \gamma\overline{ t}c$ also can be used to detect $h^{ 0}_{ t}$ at LC experiments.
Categories: hep-ph