Metastability bounds on the two Higgs doublet model

Barroso, A.; Ferreira, P. M.; Иванов, И. П.; Santos, Rui

doi:10.1007/jhep06(2013)045

Cited by 167 publications

(115 citation statements)

References 58 publications

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“…The program verifies if the tree-level potential is bounded from below by applying the conditions given in [82] and checks for tree-level perturbative unitarity as described in [83]. In the CP-conserving 2HDM investigated here, the requirement that the neutral CP-even tree-level minimum is the global one is tested through a simple condition [84]. The consistency with the EW precision constraints has been checked through the oblique parameters S, T and U [85] by applying the general procedure for extended Higgs sectors as described in [86,87] and demanding for compatibility with the SM fit [88] within 2σ, including correlations.…”

Section: Constraints and Parameter Scanmentioning

confidence: 99%

Strong first order electroweak phase transition in the CP-conserving 2HDM revisited

Basler

Krause

Mühlleitner

et al. 2017

J. High Energ. Phys.

171

167

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The discovery of the Higgs boson by the LHC experiments ATLAS and CMS has marked a milestone for particle physics. Yet, there are still many open questions that cannot be answered within the Standard Model (SM). For example, the generation of the observed matter-antimatter asymmetry in the universe through baryogenesis can only be explained qualitatively in the SM. A simple extension of the SM compatible with the current theoretical and experimental constraints is given by the 2-Higgs-Doublet Model (2HDM) where a second Higgs doublet is added to the Higgs sector. We investigate the possibility of a strong first order electroweak phase transition in the CP-conserving 2HDM type I and type II where either of the CP-even Higgs bosons is identified with the SM-like Higgs boson. The renormalisation that we apply on the loop-corrected Higgs potential allows us to efficiently scan the 2HDM parameter space and simultaneously take into account all relevant theoretical and up-to-date experimental constraints. The 2HDM parameter regions found to be compatible with the applied constraints and a strong electroweak phase transition are analysed systematically. Our results show that there is a strong interplay between the requirement of a strong phase transition and collider phenomenology with testable implications for searches at the LHC.

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Section: Constraints and Parameter Scanmentioning

confidence: 99%

Strong first order electroweak phase transition in the CP-conserving 2HDM revisited

Basler

Krause

Mühlleitner

et al. 2017

J. High Energ. Phys.

171

167

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“…In this case tunnelling could occur from our minimum to another one with a different electroweak scale. In [54,55] condition [54][55][56] it is possible to know exactly whether our CP-conserving vacuum is the global one. We define the discriminant The vacuum with the correct pattern of symmetry breaking is the global minimum of the potential if and only if D > 0.…”

Section: Theoretical Constraints On the Parametrersmentioning

confidence: 99%

High scale impact in alignment and decoupling in two-Higgs-doublet models

et al. 2018

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The two-Higgs-doublet model (2HDM) provides an excellent benchmark to study physics beyond the Standard Model (SM). In this work, we discuss how the behavior of the model at high-energy scales causes it to have a scalar with properties very similar to those of the SM-which means the 2HDM can be seen to naturally favor a decoupling or alignment limit. For a type II 2HDM, we show that requiring the model to be theoretically valid up to a scale of 1 TeV, by studying the renormalization group equations (RGE) of the parameters of the model, causes a significant reduction in the allowed magnitude of the quartic couplings. This, combined with B-physics bounds, forces the model to be naturally decoupled. As a consequence, any nondecoupling limits in type II, like the wrong-sign scenario, are excluded. On the contrary, even with the very constraining limits for the Higgs couplings from the LHC, the type I model can deviate substantially from alignment. An RGE analysis similar to that made for type II shows, however, that requiring a single scalar to be heavier than about 500 GeV would be sufficient for the model to be decoupled. Finally, we show that the 2HDM is stable up to the Planck scale independently of which of the CP-even scalars is the discovered 125 GeV Higgs boson.

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“…For the CP-conserving potential eq. (2.2), all these requirements are translated into relations between the different λ i introduced on the potential as below [64,71,72]:…”

Section: Jhep01(2017)007mentioning

confidence: 99%

The muon magnetic moment in the 2HDM: complete two-loop result

Cherchiglia

Kneschke

Stöckinger

et al. 2017

J. High Energ. Phys.

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Abstract:We study the 2HDM contribution to the muon anomalous magnetic moment a µ and present the complete two-loop result, particularly for the bosonic contribution. We focus on the Aligned 2HDM, which has general Yukawa couplings and contains the type I, II, X, Y models as special cases. The result is expressed with physical parameters: three Higgs boson masses, Yukawa couplings, two mixing angles, and one quartic potential parameter. We show that the result can be split into several parts, each of which has a simple parameter dependence, and we document their general behavior. Taking into account constraints on parameters, we find that the full 2HDM contribution to a µ can accommodate the current experimental value, and the complete two-loop bosonic contribution can amount to (2 · · · 4) × 10 −10 , more than the future experimental uncertainty.

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Metastability bounds on the two Higgs doublet model

Cited by 167 publications

References 58 publications

Strong first order electroweak phase transition in the CP-conserving 2HDM revisited

Strong first order electroweak phase transition in the CP-conserving 2HDM revisited

High scale impact in alignment and decoupling in two-Higgs-doublet models

The muon magnetic moment in the 2HDM: complete two-loop result

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