QCD corrections to top quark pair production via fusion of both polarized and
unpolarized photons are calculated in Supersymmetric Model. The corrections are
found to be sizable. The dependence of the corrections on the masses of the
supersymmetric particles is also investigated. Furthermore, we studied CP
asymmetry effects arising from the complex couplings in the MSSM. The CP
violating parameter can reach 10−2 for favorable parameter values.Comment: 26 pages, LaTex, including 12 figures in 12 eps files. submitted to
Phys. Rev.