Yukawa Alignment in a Multi Higgs Doublet Model: An effective approach

Abstract

In the two Higgs doublet model, natural flavour conservation can be achieved through the use of a discrete Z2 symmetry. A less restrictive condition is the requirement of alignment in the Yukawa sector. So far, alignment has been an anzatz, not rooted in a specific model. In this letter we present a model for alignment, which starts with 2+N Higgs doublets, with natural flavour conservation imposed by a discrete symmetry. Only two of these scalars couple to the fermions, the other N scalars are in a hidden sector. Assuming that the two scalar doublets coupled to fermions are heavy, their decoupling leads to an effective Yukawa interaction. The latter connects the fermions and the scalars of the hidden sector, and exhibits the same Yukawa coupling matrix for each of the N scalars.

7 pages

References in corpus (2)

• Flavour physics of leptons and dipole moments
• Models of Yukawa interaction in the two Higgs doublet model, and their collider phenomenology

Cited by in corpus (23)

• Theory and phenomenology of two-Higgs-doublet models
• LHC constraints on two-Higgs doublet models
• $B_{s,d}^0\to {\ell }^{+}{\ell }^{-}$ Decays in the Aligned Two-Higgs-Doublet Model
• Exclusive radiative B-meson decays within the aligned two-Higgs-doublet model
• Flavour alignment in multi-Higgs-doublet models
• An invisible axion model with controlled FCNCs at tree level
• Yukawa alignment from natural flavor conservation
• Fermion and scalar phenomenology of a 2-Higgs doublet model with $S_3$
• $U(1)$ flavour symmetries as Peccei-Quinn symmetries
• Yukawa sector of Multi Higgs Doublet Models in the presence of Abelian symmetries
• Flavour Conservation in Two Higgs Doublet Models
• Recognizing symmetries in 3HDM in basis-independent way
• A class of invisible axion models with FCNCs at tree level
• Effective Aligned 2HDM with a DFSZ-like invisible axion
• Dark Matter Phenomenology of SM and Enlarged Higgs Sectors Extended with Vector Like Leptons
• LHC bounds on coloured scalars
• FCNC-free multi-Higgs-doublet models from broken family symmetries
• Natural Quasi-Alignment with two Higgs Doublets and RGE Stability
• Flavour-changing top decays in the aligned two-Higgs-doublet model
• Natural 2HDMs without FCNCs
• Spontaneous symmetry breaking in three-Higgs-doublet $S_3$-symmetric models
• A Classification and Analysis of Higgs-flavor Models
• Higgs-Flavor Groups, Naturalness, and Dark Matter