抄録
We study the impact of non-standard interactions characterized by dimension-six operators on the effective top Yukawa coupling. The cross section of the process e^-e^+→W^-W^+vv→ttvv is discussed including these operators, and possible deviation from the standard model prediction is evaluated under the constraint from perturbative unitarity and current experimental data. We find that if the new physics scale is in a TeV region, the cross section can be significantly enhanced due to the non-standard interactions. Such a large effect should be detectable at the International Linear Collider.
