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

2020 ◽  
Vol 2020 (10) ◽  
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.

scholarly journals Global fits in the Aligned Two-Higgs-Doublet model

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
Otto Eberhardt ◽  
Ana Peñuelas Martínez ◽  
Antonio Pich
Keyword(s):  
Cp Violation ◽  
Scalar Potential ◽  
Higgs Doublet ◽  
Precision Measurements ◽  
Mixing Matrix ◽  
Doublet Model ◽  
Global Fit ◽  
Two Higgs Doublet Model ◽  
Electroweak Precision ◽  
Higgs Signal

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.

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

1990 ◽  
Vol 337 (2) ◽  
pp. 284-312 ◽  
Author(s):  
Andrzej J. Buras ◽  
Paweł Krawczyk ◽  
Markus E. Lautenbacher ◽  
Claudia Salazar
Keyword(s):  
Cp Violation ◽  
Higgs Doublet ◽  
Doublet Model ◽  
Two Higgs Doublet Model

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

2011 ◽  
Vol 26 (15) ◽  
pp. 2523-2535 ◽  
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.

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

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.

scholarly journals Reparameterization of the scalar potential in the two Higgs doublet model

2006 ◽  
Vol 47 (3) ◽  
pp. 785-790
Author(s):  
Rodolfo A. Diaz ◽  
Viviana Dionicio ◽  
R. Martinez
Keyword(s):  
Scalar Potential ◽  
Higgs Doublet ◽  
Doublet Model ◽  
Two Higgs Doublet Model

FCNI suppression and CP violation in a two-Higgs-doublet model

1994 ◽  
Vol 20 (8) ◽  
pp. 1159-1168 ◽  
Author(s):  
L Epele ◽  
H Fanchiotti ◽  
C Garcia Canal ◽  
D Gomez Dumm
Keyword(s):  
Cp Violation ◽  
Higgs Doublet ◽  
Doublet Model ◽  
Two Higgs Doublet Model

scholarly journals Simulations of domain walls in Two Higgs Doublet Models

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Richard A. Battye ◽  
Apostolos Pilaftsis ◽  
Dominic G. Viatic
Keyword(s):  
Domain Walls ◽  
Initial Conditions ◽  
Higgs Doublet ◽  
Model Parameters ◽  
Field Equations ◽  
Random Initial Conditions ◽  
Topological Current ◽  
Dynamical Simulations ◽  
Doublet Model ◽  
Two Higgs Doublet Model

Abstract The Two Higgs Doublet Model predicts the emergence of 3 distinct domain wall solutions arising from the breaking of 3 accidental global symmetries, Z2, CP1 and CP2, at the electroweak scale for specific choices of the model parameters. We present numerical kink solutions to the field equations in all three cases along with dynamical simulations of the models in (2+1) and (3+1) dimensions. For each kink solution we define an associated topological current. In all three cases simulations produce a network of domain walls which deviates from power law scaling in Minkowski and FRW simulations. This deviation is attributed to a winding of the electroweak group parameters around the domain walls in our simulations. We observe a local violation of the neutral vacuum condition on the domain walls in our simulations. This violation is attributed to relative electroweak transformations across the domain walls which is a general feature emerging from random initial conditions.

scholarly journals CP -violation in the two Higgs doublet model: From the LHC to EDMs

2018 ◽  
Vol 97 (1) ◽  
Author(s):  
Chien-Yi Chen ◽  
Hao-Lin Li ◽  
Michael Ramsey-Musolf
Keyword(s):  
Cp Violation ◽  
Higgs Doublet ◽  
Doublet Model ◽  
Two Higgs Doublet Model

MODELS OF CP VIOLATION EXCLUSIVELY VIA NEUTRAL-SCALAR EXCHANGE

1994 ◽  
Vol 09 (11) ◽  
pp. 1873-1888 ◽  
Author(s):  
L. LAVOURA
Keyword(s):  
Cp Violation ◽  
W Bosons ◽  
Higgs Doublet ◽  
Higgs Bosons ◽  
Neutral Scalar ◽  
Charged Higgs ◽  
Doublet Model ◽  
Charged Higgs Bosons ◽  
Two Higgs Doublet Model

I suggest a two-Higgs-doublet model in which CP violation is mediated only by the neutral Higgs bosons, via the mechanism of scalar-pseudoscalar mixing. In this model there is no CP violation in the exchange of either W bosons or charged Higgs bosons. The model has only two basic CP-violating quantities. I remark that other models of this kind, but with more than two Higgs doublets, may also be built.

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