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We study pseudo-Goldstone boson corrections to top quark pair productionrates in technicolor models with and without topcolor at the E=0.5 teV and 1.5TeV photon colliders. We find that, for reasonable ranges of the parameters,the corrections are large enough to be observable, and the corrections inmodels with topcolor are considerably larger than those in models withouttopcolor, and they are all significantly larger than the correspondingcorrections in the minimal supersymmetric standard model (MSSM) with tan(beta)of the order of 1. So that the two kinds of technicolor models and the MSSMwith tan(beta) of the order of 1 can be experimentally distinguished.Comment: Version for publication in Phys.Rev.D with some references and  discussions added and some typos correcte

Testing technicolor models in top quark pair production at high energy photon colliders