Top quark chromoelectric and chromomagnetic dipole moments in a two Higgs doublet model with $CP$ violation

In this work we study the anomalous top quark-gluon couplings chromoelectric dipole moment and chromomagnetic dipole moment in a general two Higgs doublet model 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 predictions for the chromomagnetic dipole moment and chromoelectric dipole moment obtained are $-0.03<\mathrm{\Delta }{\tilde{k}}_t<-0.005$ and $|\mathrm{\Delta }{\tilde{d}}_t|<0.005$, respectively.

Figure 1

Feynman Diagram for the anomalous quark-gluon couplings in the general THDM.

Figure 2

Scatter plot in the $\mathrm{\Delta }\tilde{\kappa }$ and $\mathrm{\Delta }\tilde{d}$ plane with random values of the angles ${\alpha }_1$, ${\alpha }_2$ in the range allowed for each region, and ${\alpha }_3=0$., $\tan \beta$, and $M_{H^{+}}$ are as defined in Table 1 in every region.

Figure 3

Scatter plot in the $\mathrm{\Delta }{\tilde{\kappa }}_t$ and $\mathrm{\Delta }{\tilde{d}}_t$ plane with random values of the angles ${\alpha }_1$, ${\alpha }_2$ in the range allowed for each region, and ${\alpha }_3=0$., $\tan \beta$, and $M_{H^{+}}$ are as defined in Table 1 in every region. In this case we plot $\mathrm{\Delta }{\tilde{d}}_t$ and $\mathrm{\Delta }{\tilde{\kappa }}_t$ including the $Y_{tt}$ contribution.

Figure 4

Scatter plot in the $\mathrm{\Delta }{\tilde{\kappa }}_t$ and $\mathrm{\Delta }{\tilde{d}}_t$ plane with random values of the angles ${\alpha }_1$, ${\alpha }_2$ in the range allowed for each region, and ${\alpha }_3=0$., $\tan \beta$, and $M_{H^{+}}$ are as defined in Table 1 in every region. In this case we plot $\mathrm{\Delta }{\tilde{d}}_t$ and $\mathrm{\Delta }{\tilde{\kappa }}_t$ including the $Y_{tt}$ contribution and also the interference contribution.