New gauge boson and spin correction of top quark pair production at ILC

Based on the SU(3) simple group model , we study the spin correction of the top quark pair production at the high energy linear e e- collider (ILC) with a center-of-mass energy =800GeV. Our numerical results show that the gauge boson ZH exchange generates very small corrections to the spin correction observable in all the parameter space, which can not be detected in the future ILC experiments.