A soft origin for CKM-type CP violation

Abstract

We present a two-Higgs-doublet model, with a $\mathbbm{Z}_3$ symmetry, in which CP violation originates solely in a soft (dimension-2) coupling in the scalar potential, and reveals itself solely in the CKM (quark mixing) matrix. In particular, in the mass basis the Yukawa interactions of the neutral scalars are all real. The model has only eleven parameters to fit the six quark masses and the four independent CKM-matrix observables. We find regions of parameter space in which the flavour-changing neutral couplings are so suppressed that they allow the scalars to be no heavier than a few hundred GeV.

Included constraints due to oblique parameters and direct LEP searches

References in corpus (15)

• Search for Neutral MSSM Higgs Bosons at LEP
• The oblique parameters in multi-Higgs-doublet models
• A precision constraint on multi-Higgs-doublet models
• Averages of b-hadron, c-hadron, and tau-lepton Properties
• Anatomy of New Physics in B-Bbar mixing
• Basis-independent methods for the two-Higgs-doublet model III: The CP-conserving limit, custodial symmetry, and the oblique parameters S, T, U
• Testing New Indirect CP Violation
• Geometric picture of generalized-CP and Higgs-family transformations in the two-Higgs-doublet model
• Note on Custodial Symmetry in the Two-Higgs-Doublet Model
• Abelian symmetries in the two-Higgs-doublet model with fermions
• Generalized CP Invariance and the Yukawa sector of Two-Higgs Models
• The B -> Xs gamma Rate and CP Asymmetry within the Aligned Two-Higgs-Doublet Model
• Charm as a domain wall fermion in quenched lattice QCD
• Natural Two-Higgs-Doublet Model
• Tuned Two-Higgs-Doublet Model

Cited by in corpus (8)

• Theory and phenomenology of two-Higgs-doublet models
• Physical Constraints on a Class of Two-Higgs Doublet Models with FCNC at tree level
• Vacuum Induced CP Violation Generating a Complex CKM Matrix with Controlled Scalar FCNC
• No strong $CP$ violation up to the one-loop level in a two-Higgs-doublet model
• Softly broken symmetries in the 2HDM -- an invariant formulation
• One-Loop Charge-Breaking Minima in the Two-Higgs Doublet Model
• Minimal U(1) two-Higgs-doublet models for quark and lepton flavour
• A three Higgs doublet model with symmetry-suppressed flavour changing neutral currents