Detecting top-Higgs at high energy e+e− colliders

We calculate the contributions of the top-Higgs ht0 predicted by topcolor assisted technicolor (TC2) models to e+e−→t̄cν̄eνe and compare the results with the contributions of h0t to the processes e+e−→Zh0t→Zt̄c and e+e−→γh0t→γt̄c. We find that e+e−→t̄cν̄eνe is very sensitive to h0t, which can be easy detected via this process at high-energy e+e− collider (LC) experiments with s⩾500 GeV, as long as its mass below the t̄t threshold. The process e+e−→γt̄c also can be used to detect h0t at LC experiments.