Enhancing $CP$ Measurement of the Yukawa Interactions of Top-Quark at $e^{-}e^{+}$ Collider

Understand

It is well known that $CP$-violating coupling of the Yukawa interaction of top-quark is a promising candidate of a new source of $CP$ violation effect.

• Precisely measurement of its $CP$ properties is crucial for understanding new physics above the electroweak scale.
• In this paper, we introduce a complete analysis method for probing $CP$ violation effects in the associated production of top-quark pair and Higgs boson at $e^{-}e^{+}$ collider.
• Reconstructions of the top-quarks are not needed in our strategy.