# Flavour alignment in multi-Higgs-doublet models

@article{Peuelas2017FlavourAI, title={Flavour alignment in multi-Higgs-doublet models}, author={Ana Bel{\'e}n Cabrejas Pe{\~n}uelas and Antonio Pich}, journal={Journal of High Energy Physics}, year={2017}, volume={2017}, pages={1-34} }

A bstractExtended electroweak scalar sectors containing several doublet multiplets require flavour-aligned Yukawa matrices to prevent the appearance at tree level of unwanted flavour-changing neutral-current transitions. We analyse the misalignment induced by one-loop quantum corrections and explore possible generalizations of the alignment condition and their compatibility with current experimental constraints. The hypothesis of flavour alignment at a high scale turns out to be consistent with…

## 36 Citations

### Flavor conservation in two-Higgs-doublet models

- PhysicsPhysical Review D
- 2018

In extensions of the Standard Model with two Higgs doublets, flavour changing Yukawa couplings of the neutral scalars may be present at tree level. In this work we consider the most general scenario…

### Global fits in the Aligned Two-Higgs-Doublet model

- Physics
- 2020

We present the results of a global fit to the Aligned Two-Higgs Doublet Model, assuming that there are no new sources of CP violation beyond the quark mixing matrix. We use the most constraining…

### LHC bounds on colored scalars

- PhysicsPhysical Review D
- 2019

We analyze the constraints on coloured scalar bosons imposed by the current LHC data at $\sqrt{s}=13$ TeV. Specifically, we consider an additional electroweak doublet of colour-octet scalars,…

### Aligned and Spontaneous Flavor Violation.

- PhysicsPhysical review letters
- 2019

We present a systematic spurion setup called aligned flavor violation (AFV) that allows for new physics couplings to quarks that are aligned with standard model (SM) Yukawa couplings, but do not…

### Electron and muon g−2 anomalies in general flavor conserving two-Higgs-doublet models

- Physics
- 2020

In general two Higgs doublet models (2HDMs) without scalar flavour changing neutral couplings (SFCNC) in the lepton sector, the electron, muon and tau interactions can be decoupled in a robust…

### Power-aligned 2HDM: a correlative perspective on (g − 2)e,μ

- Physics
- 2020

With the hypothesis of minimal flavor violation, we find that there exists a power-aligned relation between the Yukawa couplings of the two scalar doublets in the two-Higgs-doublet model with…

### Natural axion model from flavour

- Physics
- 2020

We explore a common symmetrical origin for two long standing problems in particle physics: the strong CP and the fermion mass hierarchy problems. The Peccei--Quinn mechanism solves the former one…

### Multi-Higgs-doublet models and singular alignment

- PhysicsJournal of High Energy Physics
- 2019

A bstractWe consider a 4-Higgs-doublet model in which each Higgs doublet gives mass to one of the fermion sets {mt}, {mb, mτ, mc}, {mμ, ms}, and {md, mu, me}. The sets have the feature that within…

### The muon $g-2$ in an Aligned 2-Higgs Doublet Model with Right-Handed Neutrinos

- Physics
- 2021

In this note, we show how one can attribute the anomaly currently present in the measurement of the anomalous magnetic moment of the muon (aμ) to the presence of an underlying Aligned 2-Higgs Doublet…

## References

SHOWING 1-10 OF 159 REFERENCES

### Constraining general two Higgs doublet models by the evolution of Yukawa couplings

- Physics, Geology
- 2011

A bstractWe study how general two Higgs doublet models can be constrained by considering their properties under renormalization group evolution of the Yukawa couplings. We take into account both the…

### Radiatively induced flavour violation in the general two-Higgs doublet model with Yukawa alignment

- Physics
- 2010

### The B -> Xs gamma Rate and CP Asymmetry within the Aligned Two-Higgs-Doublet Model

- Physics
- 2010

In the two-Higgs-doublet model the alignment of the Yukawa matrices in flavour space guarantees the absence of flavour-changing neutral currents at tree level, while introducing new sources for CP…

### Charged-Higgs phenomenology in the aligned two-Higgs-doublet model

- Physics
- 2010

The alignment in flavour space of the Yukawa matrices of a general two-Higgs-doublet model results in the absence of tree-level flavour-changing neutral currents. In addition to the usual fermion…

### High scale flavor alignment in two-Higgs doublet models and its phenomenology

- Physics
- 2017

A bstractThe most general two-Higgs doublet model (2HDM) includes potentially large sources of flavor changing neutral currents (FCNCs) that must be suppressed in order to achieve a…

### LHC constraints on two-Higgs doublet models

- Physics
- 2013

A bstractA new Higgs-like boson with mass around 126 GeV has recently been discovered at the LHC. The available data on this new particle is analyzed within the context of two-Higgs doublet models…

### Higgs couplings to fermions: 2HDM with MFV

- Physics
- 2013

A bstractWe clarify several subtleties concerning the implementation of minimal flavor violation (MFV) in two Higgs doublet models. We derive all the exact and approximate predictions of MFV for the…

### New Barr-Zee contributions to (g − 2)μ in two-Higgs-doublet models

- Physics
- 2015

A bstractWe study the contribution of new sets of two-loop Barr-Zee type diagrams to the anomalous magnetic moment of the muon within the two-Higgs-doublet model framework. We show that some of these…

### Flavour-changing top decays in the aligned two-Higgs-doublet model

- Physics
- 2015

A bstractWe perform a complete one-loop computation of the two-body flavour-changing top decays t → ch and t → cV (V = γ, Z), within the aligned two-Higgs-doublet model. We evaluate the impact of the…