Speaker
琪 毕
Description
We propose a novel observable in boosted top quark decay, which can be used to measure the anomalous $Wtb$ interaction. The observable is an angular correlation between the $t\to bW$ decay plane and the $W\to f\bar{f'}$ decay plane, which is related to the polarization of $W$. We show that a forward-backward asymmetry of the angular distribution is sensitive to complex phases in the $Wtb$ anomalous couplings for both leptonic and hadronic decay modes of top quark. In this work, we analyze the prospects of probing the CP violation in the $t\bar{t}$ system at future lepton colliders.
