Controlled Flavour Changing Neutral Couplings in Two Higgs Doublet Models

Abstract

We propose a class of Two Higgs Doublet Models where there are Flavour Changing Neutral Currents (FCNC) at tree level, but under control due to the introduction of a discrete symmetry in the full Lagrangian. It is shown that in this class of models, one can have simultaneously FCNC in the up and down sectors, in contrast to the situation encountered in BGL models. The intensity of FCNC is analysed and it is shown that in this class of models one can respect all the strong constraints from experiment without unnatural fine-tuning. It is pointed out that the additional sources of flavour and CP violation are such that they can enhance significantly the generation of the Baryon Asymmetry of the Universe, with respect to the Standard Model.

29 pages, 3 figures

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Cited by in corpus (12)

• Rare Top Decays as Probes of Flavorful Higgs Bosons
• Flavour Conservation in Two Higgs Doublet Models
• Bounded masses in Two Higgs Doublets Models, Spontaneous CP Violation and ${\mathbb{Z}}_2$ symmetry
• Flavorful Two Higgs Doublet Models with a Twist
• Vacuum Induced CP Violation Generating a Complex CKM Matrix with Controlled Scalar FCNC
• Symmetry Constrained Two Higgs Doublet Models
• Extending Trinity to the Scalar Sector through Discrete Flavoured Symmetries
• FCNC decays of the Higgs bosons in the BGL model
• The framework for a common origin of ${\delta }_{\mathrm{CKM}}$ and ${\delta }_{\mathrm{PMNS}}$
• Two-Higgs-Doublet Models with a Flavored ${\mathbb{Z}}_2$
• Hidden physics in pion and some other meson decays
• Limiting FCNC induced by a CP symmetry of order 4