Global fits in the Aligned Two-Higgs-Doublet model

Abstract 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 flavour observables, electroweak precision measurements and the available data on Higgs signal strengths and collider searches for heavy scalars, together with the theoretical requirements of perturbativity and positivity of the scalar potential. The combination of all these constraints restricts the values of the scalar masses, the couplings of the scalar potential and the flavour-alignment parameters. The numerical fits have been performed using the open-source HEPfit package.

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Collapsing domain walls in the two-Higgs-doublet model and deep insights from the EDM

Journal of High Energy Physics ◽

10.1007/jhep10(2020)081 ◽

2020 ◽

Vol 2020 (10) ◽

Cited By ~ 2

Author(s):

Ning Chen ◽

Tong Li ◽

Zhaolong Teng ◽

Yongcheng Wu

Keyword(s):

Cp Violation ◽

Domain Wall ◽

Domain Walls ◽

Scalar Potential ◽

Higgs Doublet ◽

Big Bang ◽

Doublet Model ◽

Electron Edm ◽

Two Higgs Doublet Model ◽

The Big Bang

Abstract We study the domain wall solutions in the general two-Higgs-doublet model (2HDM) with a CP-violating phase. The 2HDM with the spontaneouse CP violation is found to have domain wall solutions whose tensions are $$ \mathcal{O} $$ O (106) GeV3, which are excluded by the Zel’dovich-Kobzarev-Okun bound. With the explicit CP-violating (CPV) terms as the so-called biased term in the scalar potential, domain walls can collapse in the early Universe. The sizes of the explicit CP violation can be constrained from the Big Bang nucleosynthesis. This constraint is converted to the CPV mixing of αc, and is mostly sensitive to the mass splittings between two heavy neutral Higgs bosons. We estimate the possible gravitational wave signals and the electric dipole moment (EDM) predictions due to the domain wall collapsing. It turns out that the peak spectrum of the GW from the domain wall collapsing cannot be probed in any future program. In contrast, the untenable regions with very tiny explicit CPV parameter in the Higgs potential has been partially excluded by the latest electron EDM measurements at the ACME-II and will be further confirmed or excluded by the future ACME-III projection.

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Entropy Production Due to Electroweak Phase Transition in the Framework of Two Higgs Doublet Model

Physics ◽

10.3390/physics3020020 ◽

2021 ◽

Vol 3 (2) ◽

pp. 275-289

Author(s):

Arnab Chaudhuri ◽

Maxim Yu. Khlopov

Keyword(s):

Phase Transition ◽

Higgs Doublet ◽

Electroweak Phase Transition ◽

First Order ◽

The Standard Model ◽

Doublet Model ◽

Two Higgs Doublet Model ◽

Electroweak Precision ◽

Scalar Sector ◽

Higgs Signal

We revisit the possibility of first order electroweak phase transition (EWPT) in one of the simplest extensions of the Standard Model scalar sector, namely the two-Higgs-doublet model (2HDM). We take into account the ensuing constraints from the electroweak precision tests, Higgs signal strengths and the recent LHC bounds from direct scalar searches. By studying the vacuum transition in 2HDM, we discuss in detail the entropy released in the first order EWPT in various parameter planes of a 2HDM.

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mixing, CP violation, and B→KγX in a two-Higgs-doublet model

Nuclear Physics B ◽

10.1016/0550-3213(90)90274-h ◽

1990 ◽

Vol 337 (2) ◽

pp. 284-312 ◽

Cited By ~ 73

Author(s):

Andrzej J. Buras ◽

Paweł Krawczyk ◽

Markus E. Lautenbacher ◽

Claudia Salazar

Keyword(s):

Cp Violation ◽

Higgs Doublet ◽

Doublet Model ◽

Two Higgs Doublet Model

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SCALAR–PSEUDOSCALAR INTERACTIONS IN NEUTRINO–ELECTRON SCATTERING

International Journal of Modern Physics A ◽

10.1142/s0217751x13501248 ◽

2013 ◽

Vol 28 (25) ◽

pp. 1350124 ◽

Cited By ~ 2

Author(s):

R. GAITÁN ◽

E. A. GARCES ◽

O. G. MIRANDA ◽

J. H. MONTES DE OCA Y

Keyword(s):

Electron Scattering ◽

Phenomenological Approach ◽

Higgs Doublet ◽

Charged Scalar ◽

Yukawa Couplings ◽

General Scalar ◽

Pseudoscalar Coupling ◽

Mixing Matrix ◽

Doublet Model ◽

Two Higgs Doublet Model

Many extensions to the Standard Model imply the existence of new charged scalar Higgs bosons. We study the contribution of a general scalar or pseudoscalar coupling for the neutrino–electron scattering. We take a phenomenological approach in order to obtain model independent limits to the couplings that arise in this picture. We illustrate the reach of the constraints by studying the particular case of the type III two Higgs doublet model, where we have found new constraints to some elements of the Yukawa couplings mixing matrix (|Yee| ≤ 1 × 10-1 and |Yeμ| ≤ 7 × 10-2 at 90% CL).

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STUDY OF CP VIOLATION IN $\Lambda_c^+$ DECAY

International Journal of Modern Physics A ◽

10.1142/s0217751x11053432 ◽

2011 ◽

Vol 26 (15) ◽

pp. 2523-2535 ◽

Cited By ~ 20

Author(s):

XIAN-WEI KANG ◽

HAI-BO LI ◽

GONG-RU LU ◽

ALAKABHA DATTA

Keyword(s):

Angular Distribution ◽

Cp Violation ◽

Vector Meson ◽

Higgs Doublet ◽

New Physics ◽

Angular Analysis ◽

The Standard Model ◽

Helicity Amplitudes ◽

Doublet Model ◽

Two Higgs Doublet Model

In this paper, we study CP violation in [Formula: see text] and [Formula: see text] decays, where B, P and V denote a light spin-½ baryon, pseudoscalar and a vector meson respectively. In these processes the T odd CP violating triple-product (TP) correlations are examined. The genuine CP violating observables which are composed of the helicity amplitudes occurring in the angular distribution are constructed. Experimentally, by performing a full angular analysis it is shown how one may extract the helicity amplitudes and then obtain the TP asymmetries. We estimate the TP asymmetries in [Formula: see text] decays to be negligible in the Standard Model making these processes an excellent place to look for new physics. Taking a two-Higgs doublet model, as an example of new physics, we show that large TP asymmetries are possible in these decays. Finally, we discuss how BES-III and super τ-charm experiments will be sensitive to these CP violating signals in [Formula: see text] decays.

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Fingerprinting the contribution of colored scalars to the $$H^+ W^- Z(\gamma )$$ vertex

The European Physical Journal C ◽

10.1140/epjc/s10052-020-08676-3 ◽

2020 ◽

Vol 80 (12) ◽

Author(s):

Nabarun Chakrabarty ◽

Indrani Chakraborty ◽

Dilip Kumar Ghosh

Keyword(s):

Scalar Potential ◽

Form Factors ◽

Higgs Doublet ◽

New Physics ◽

Model Parameters ◽

Minimal Flavour Violation ◽

Color Octet ◽

Flavour Violation ◽

Doublet Model ◽

Two Higgs Doublet Model

AbstractColor-octet scalars arise in various Grand Unification scenarios and also in other models of new physics. They are also postulated for minimal flavour violation. Purely phenomenological imprints of such scalars are therefore worth looking at. Motivated by this, we perform a complete one-loop calculation of the $$H^+ \rightarrow W^+ Z (\gamma )$$ H + → W + Z ( γ ) decay in a two Higgs doublet model augmented by a color-octet $$SU(2)_L$$ S U ( 2 ) L scalar doublet. The computation is conveniently segregated into colorless and colored components. The color-octet part of the amplitude, being scaled by the color-factor, provides an overall enhancement to the form factors. Crucial constraints from perturbative unitarity, positivity of the scalar potential, oblique parameters, Higgs signal strengths and direct search of a charged Higgs and color-octet scalars are folded-in into the analysis. Sensitivity of the loop-induced $$H^+ \rightarrow W^+ Z (\gamma )$$ H + → W + Z ( γ ) vertex to other model parameters is elucidated. Finally, the prospect of observing a loop-induced $$H^+ \rightarrow W^+ Z (\gamma )$$ H + → W + Z ( γ ) interaction at the future hadronic collisions is also discussed.

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Exploring the 2HDM with Global Fits in GAMBIT

EPJ Web of Conferences ◽

10.1051/epjconf/202024506022 ◽

2020 ◽

Vol 245 ◽

pp. 06022

Author(s):

Filip Rajec ◽

Wei Su ◽

Martin White ◽

Anthony G. Williams

Keyword(s):

Higgs Doublet ◽

Experimental Results ◽

Type Ii ◽

Vacuum Stability ◽

Doublet Model ◽

Global Fit ◽

Electroweak Physics ◽

Two Higgs Doublet Model

In this work, we present preliminary results of a global fit of the typeII two-Higgs-doublet model (2HDM) with the tool GAMBIT. Our study includes various constraints, including the theoretical constraints (unitarity, perturbativity and vacuum stability), Higgs searches at colliders, electroweak physics and flavour constraints. With the latest experimental results, our results not only confirm past studies but also go further in probing the model. We find, for example, that the measurements of B→K*µ+µ− angular observables cannot be explained in the type-II 2HDM.

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