Abstract
We study top quark pair productions at a polarized photon collider from an e{sup +}e{sup -} linear collider (LC) in various improved technicolor models, namely, the one-family walking technicolor model, the top-color-assisted technicolor model, and the top-color-assisted multiscale technicolor model. Recent constraint on the top-pion mass from the precision data of R{sub b} is considered. It is shown that, considering only the statistical errors, a polarized photon collider from a 500 GeV LC with an integrated luminosity of 500 fb{sup -1} is sufficient for distinguishing the three improved technicolor models experimentally.
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