The process e+e−→t̄c

We consider the flavor changing neutral current (FCNC) process e+e−→t̄c (or tc̄) in the context of topcolor-assisted technicolor (TC2) models. We find that the contributions of charged scalars (technipions and top-pions) and topcolor gauge bosons are negligibly small. The neutral scalars (top-pion πt0 and top-Higgs ht0) can give significant contributions to this process. With reasonable values of the parameters in TC2 models, there will be several tens of the observable t̄c events to be generated in the future e+e− linear colliders.