Associated production of a neutral top-Higgs with a heavy-quark pair in the gammagamma collisions at ILC

We have studied the associated production processes of a neutral top-Higgs in the topcolor assisted technicolor model with a pair of heavy quarks in gammagamma collisions at the International Linear Collider (ILC). We find that the cross section for tbar{t}h_t in gammagamma collisions is at the level of a few fb with the c.m. energy sqrt{s}=1000 GeV, which is consistent with the results of the cross section of tbar{t}H in the standard model and the cross section of tbar{t}h in the minimal supersymmetric standard modeland the little Higgs models. It should be distinct that hundreds of to thousands of h_t per year can be produced at the ILC, this process of gammagamma to tbar{t}h_t is really interesting in testing the standard model and searching the signs of technicolor.