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 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 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 Constraints on two-Higgs-doublet model parameters in light of rare B decays

2017 ◽  
Vol 95 (7) ◽  
Author(s):  
Mureed Hussain ◽  
Muhammad Usman ◽  
Muhammad Ali Paracha ◽  
Muhammad Jamil Aslam
Keyword(s):  
Higgs Doublet ◽  
Model Parameters ◽  
B Decays ◽  
Doublet Model ◽  
Rare B Decays ◽  
Two Higgs Doublet Model

scholarly journals Interplay of New Physics effects in (g − 2)ℓ and h → ℓ+ℓ− — lessons from SMEFT

2021 ◽  
Vol 2021 (6) ◽  
Author(s):  
Svjetlana Fajfer ◽  
Jernej F. Kamenik ◽  
M. Tammaro
Keyword(s):  
Closed Operator ◽  
Higgs Doublet ◽  
New Physics ◽  
Effective Field ◽  
Tree Level ◽  
Electroweak Symmetry ◽  
Scalar Leptoquark ◽  
Doublet Model ◽  
The One ◽  
Two Higgs Doublet Model

Abstract We explore the interplay of New Physics (NP) effects in (g− 2)ℓ and h→ℓ+ℓ− within the Standard Model Effective Field Theory (SMEFT) framework, including one-loop Renormalization Group (RG) evolution of the Wilson coefficients as well as matching to the observables below the electroweak symmetry breaking scale. We include both the leading dimension six chirality flipping operators including a Higgs and SU(2)L gauge bosons as well as four-fermion scalar and tensor operators, forming a closed operator set under the SMEFT RG equations. We compare present and future experimental sensitivity to different representative benchmark scenarios. We also consider two simple UV completions, a Two Higgs Doublet Model and a single scalar LeptoQuark extension of the SM, and show how tree level matching to SMEFT followed by the one-loop RG evolution down to the electroweak scale can reproduce with high accuracy the (g−2)ℓ and h→ℓ+ℓ− contributions obtained by the complete one- and even two-loop calculations in the full models.

scholarly journals Signals of new gauge bosons in gauged two higgs doublet model

2018 ◽  
Vol 78 (8) ◽  
Author(s):  
Wei-Chih Huang ◽  
Hiroyuki Ishida ◽  
Chih-Ting Lu ◽  
Yue-Lin Sming Tsai ◽  
Tzu-Chiang Yuan
Keyword(s):  
Higgs Doublet ◽  
Gauge Bosons ◽  
Doublet Model ◽  
Two Higgs Doublet Model

scholarly journals THE EFFECTS OF NON-UNIVERSAL EXTRA DIMENSIONS ON THE $\tau\rightarrow\mu\bar\nu_i\nu_i$ DECAY

2005 ◽  
Vol 20 (24) ◽  
pp. 1845-1857 ◽  
Author(s):  
E. O. ILTAN
Keyword(s):  
Extra Dimension ◽  
Extra Dimensions ◽  
Branching Ratio ◽  
Higgs Doublet ◽  
Doublet Model ◽  
Two Higgs Doublet Model

We study [Formula: see text], i = e, μ, τ decays in the two-Higgs doublet model, with the inclusion of one and two spatial non-universal extra dimensions. We observe that the branching ratio is sensitive to two extra dimensions in contrary to a single extra dimension.

scholarly journals Neutron electric dipole moment in two higgs doublet model

1995 ◽  
Vol 39 (2-3) ◽  
pp. 276-278
Author(s):  
T. Hayashi ◽  
Y. Koide ◽  
M. Matsuda ◽  
M. Tanimoto
Keyword(s):  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Higgs Doublet ◽  
Neutron Electric Dipole Moment ◽  
Doublet Model ◽  
Two Higgs Doublet Model
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