Status of the two-Higgs-doublet model of type II

Eberhardt, Otto; Nierste, Ulrich; Wiebusch, Martin

doi:10.1007/jhep07(2013)118

Cited by 122 publications

(111 citation statements)

References 118 publications

Supporting

Mentioning

105

Contrasting

Order By: Relevance

“…According to the Z 2 charges of the SM quarks and leptons, there exist four types of 2HDM: Type I, Type II, Type X, and Type Y [15,16]. In the normal setup of h 0 = h 125 , there are extensive studies on the global fit analysis of the Higgs signal strengths as well as the phenomenology of the other heavy Higgs bosons [17][18][19][20][21][22][23][24][25][26][27][28]. The hidden light…”

Section: Lhc Boundsmentioning

confidence: 99%

Higgs potential and hidden light Higgs scenario in two Higgs doublet models

et al. 2015

View full text Add to dashboard Cite

In two Higgs doublet models, there exists an interesting possibility, the hidden light Higgs scenario, that the discovered SM-like Higgs boson is the heavier CP -even Higgs boson H 0 and the lighter CP -even h 0 has not been observed yet in any experiment. We study the current status of this scenario in Types I, II, X, and Y, through the scans of the parameters with all relevant theoretical and experimental constraints. We employ not only the most up-to-date Higgs signal strength measurements with the feed-down effects, but also all the available LHC exclusion limits from heavy Higgs searches. Adjusting the heavier H 0 to the 125 GeV state while hiding the lighter h 0 from the LEP Higgs search prohibits the extreme decoupling limit: there exist upper bounds on the masses of the pseudoscalar A 0 and the charged Higgs H ± below about 600 GeV. In addition, the Z 2 symmetry is shown to be a good approximate symmetry since the soft Z 2 symmetry breaking parameter m 2 12 should be less than about (45 GeV) 2 . Most interestingly, a few parameters in the Higgs potential and the related Higgs triple and quartic couplings are shown to be meaningfully constrained by the current data. The double Higgs-strahlung process at an e + e − collider is also studied.

show abstract

Section: Lhc Boundsmentioning

confidence: 99%

Higgs potential and hidden light Higgs scenario in two Higgs doublet models

et al. 2015

View full text Add to dashboard Cite

show abstract

“…As a consequence, there will be some deviation from the alignment limit in For the Higgs couplings to the SM vector bosons and fermions, we use the constraints in the (tan β, β − α) plane derived from a recent global fit for the Type-II 2HDM [21,22]. 9 For a given set of SO (5) boundary conditions µ X , tan β(µ X ), λ(µ X ) , we thus require that the RG-evolved 2HDM parameters at the weak scale must satisfy the above constraints on the lightest CP-even Higgs boson sector.…”

Section: Misalignment Predictionsmentioning

confidence: 99%

“…B → X s γ [51][52][53][54]. For this, we use the global fit results for the Type-II 2HDM from [21], which includes limits derived from electroweak precision data, as well as flavour constraints from ∆m Bs and B → X s γ relevant for the low tan β region. The comparison of the existing limit on the charged Higgs-boson mass as a function of tan β with our predicted limits from the alignment condition for a typical value of the boundary scale µ X = 3 × 10 4 GeV is shown in figure 3.…”

Section: Misalignment Predictionsmentioning

confidence: 99%

Maximally symmetric two Higgs doublet model with natural standard model alignment

Dev

Pilaftsis

2014

J. High Energ. Phys.

180

View full text Add to dashboard Cite

Abstract:We study the Higgs mass spectrum as predicted by a Maximally Symmetric Two Higgs Doublet Model (MS-2HDM) potential based on the SO(5) group, softly broken by bilinear Higgs mass terms. We show that the lightest Higgs sector resulting from this MS-2HDM becomes naturally aligned with that of the Standard Model (SM), independently of the charged Higgs boson mass and tan β. In the context of Type-II 2HDM, SO(5) is the simplest of the three possible symmetry realizations of the scalar potential that can naturally lead to the SM alignment. Nevertheless, renormalization group effects due to the hypercharge gauge coupling g and third-generation Yukawa couplings may break sizeably this alignment in the MS-2HDM, along with the custodial symmetry inherited by the SO (5) group. Using the current Higgs signal strength data from the LHC, which disfavour large deviations from the SM alignment limit, we derive lower mass bounds on the heavy Higgs sector as a function of tan β, which can be stronger than the existing limits for a wide range of parameters. In particular, we propose a new collider signal based on the observation of four top quarks to directly probe the heavy Higgs sector of the MS-2HDM during the run-II phase of the LHC.

show abstract

“…In order to estimate the possible size of the effect in tt production we choose tan β = 0.7 which leads to top-Yukawa couplings of the neutral Higgs bosons that are still in accord with experimental constraints. This choice constrains also the mass of the charged Higgs boson to m + > 720 GeV [11,12,13].…”

Section: Pos(lhcp2016)088mentioning

confidence: 99%

Heavy Higgs boson resonances and their decay into top quarks at the LHC

Bernreuther¹,

Galler²,

Mellein³

et al. 2016

Proceedings of Fourth Annual Large Hadron Collider Physics — PoS(LHCP2016)

View full text Add to dashboard Cite

We investigate, within the type-II two-Higgs-doublet extension of the standard model (SM), the impact of heavy neutral Higgs boson resonances with unsuppressed Yukawa couplings to top quarks on top-quark pair production at the LHC at next-to-leading order (NLO) in the strong coupling constant. We take into account the resonant Higgs boson contributions, the non-resonant SM tt continuum and the interference of these two contributions. The NLO QCD corrections to heavy Higgs production and the interference contributions are calculated in the large top-quark mass (m t ) limit, including an effective K-factor rescaling. Our evaluation of the QCD-Higgs interference is focused on the Higgs resonance region. Using representative CP-conserving as well as CP-violating parameter scenarios phenomenological results are presented for different observables.

show abstract

Status of the two-Higgs-doublet model of type II

Cited by 122 publications

References 118 publications

Higgs potential and hidden light Higgs scenario in two Higgs doublet models

Higgs potential and hidden light Higgs scenario in two Higgs doublet models

Maximally symmetric two Higgs doublet model with natural standard model alignment

Heavy Higgs boson resonances and their decay into top quarks at the LHC

Contact Info

Product

Resources

About