Top quark Chromoelectric and Chromomagnetic Dipole Moments in a Two Higgs Doublet Model with CP violation

TL;DR

This paper investigates the effects of CP violation in a two Higgs doublet model on the top quark's chromoelectric and chromomagnetic dipole moments, providing new bounds on these couplings.

Contribution

It introduces the impact of the $Y_{tt}$ Yukawa coupling in a CP-violating two Higgs doublet model on top quark dipole moments, with quantitative bounds.

Findings

CMDM and CEDM bounds: -0.03 to 0.005 and less than 0.005, respectively.

Highlights the significance of the $Y_{tt}$ Yukawa coupling in the model.

Provides constraints relevant for future collider experiments.

Abstract

In this work we study the anomalous top quark-gluon couplings Chromoelectric Dipole Moment (CEDM) and Chromomagnetic Dipole Moment (CMDM) in a general THDM with CP violation. We find that this model provides an important contribution from the $Y_{tt}$ Yukawa coupling that needs to be taken into account. The CMDM and CEDM obtained are $-0.03<\Delta\tilde{k} < 0.005}$ and $|\Delta \tilde{d}| < 0.005$, respectively.