CP-Violating Lepton-Energy Correlation in e\bar{e}\to t\bar{t}

Abstract

In order to observe a signal of possible CP violation in top-quark couplings, we have studied energy correlation of the final leptons in $e^{+}{e}^{-}\to t\bar{t}\to {\ell }^{+}{\ell }^{-}X/{\ell }^{\pm }X$ at future linear colliders. Applying the recently-proposed optimal method, we have compared the statistical significances of CP-violation-parameter determination using double- and single-lepton distributions. We have found that the single-lepton-distribution analysis is more advantageous.

Comments: Final version (to appear in Phys.Lett.B)