b quark Electric Dipole moment in the general two Higgs Doublet and three Higgs Doublet models

TL;DR

This paper investigates the electric dipole moment of the b quark within general two and three Higgs Doublet models, highlighting potential enhancements over the Standard Model predictions due to complex Yukawa couplings.

Contribution

It provides a detailed analysis of the b quark EDM in extended Higgs models, emphasizing the impact of new phases and Higgs masses on the EDM value.

Findings

b quark EDM estimated at 10^{-20} e cm

EDM significantly larger than Standard Model predictions

Complex Yukawa couplings influence EDM magnitude

Abstract

We study the Electric Dipole moment of b quark in the general two Higgs Doublet model (model III) and three Higgs Doublet model with O(2) symmetry in the Higgs sector. We analyse the dependency of this quantity to the new phase coming from the complex Yukawa couplings and masses of charged and neutral Higgs bosons. We see that the Electric Dipole moment of b quark is at the order of 10^{-20} e cm, which is an extremely large value compared to one calculated in the SM and also two Higgs Doublet model (model II) with real Yukawa couplings.