Basis-independent treatment of the complex 2HDM

The complex 2HDM (C2HDM) is the most general CP-violating two Higgs doublet model that possesses a softly-broken \mathbb{Z}_2symmetry. However, the physical consequences of the model cannot depend on the basis of scalar fields used to define it. Thus, to get a better sense of the significance of the C2HDM parameters, we have analyzed this model by employing a basis-independent formalism. This formalism involves transforming to the Higgs basis...