Higgs singlet extension parameter space in the light of the LHC discovery

Pruna, Giovanni Marco; Robens, Tania

doi:10.1103/physrevd.88.115012

Cited by 121 publications

(156 citation statements)

References 42 publications

Supporting

Mentioning

152

Contrasting

Order By: Relevance

“…With the discovery and identification of a SM-like Higgs boson, the question of the validity of extended Higgs sectors up to the Planck scale has become more focused. A number of authors have considered the stability properties of extended Higgs sectors with additional singlet scalar fields [29][30][31][32] and 2HDMs with constrained scalar potentials [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Preserving the validity of the two-Higgs-doublet model up to the Planck scale

2015

View full text Add to dashboard Cite

We examine the constraints on the two Higgs doublet model (2HDM) due to the stability of the scalar potential and absence of Landau poles at energy scales below the Planck scale. We employ the most general 2HDM that incorporates an approximately Standard Model (SM) Higgs boson with a flavor aligned Yukawa sector to eliminate potential tree-level Higgs-mediated flavor changing neutral currents. Using basis independent techniques, we exhibit regimes of the 2HDM parameter space with a 125 GeV SM-like Higgs boson that is stable and perturbative up to the Planck scale. Implications for the heavy scalar spectrum are exhibited.

show abstract

Section: Introductionmentioning

confidence: 99%

Preserving the validity of the two-Higgs-doublet model up to the Planck scale

2015

View full text Add to dashboard Cite

show abstract

“…One simple extension is adding a real scalar singlet to the SM Higgs sector [48][49][50][51][52]. Moreover, in this model, it is straightforward to produce a strong first order phase transition [6,7].…”

Section: Triple-higgs Production In the Higgs Singlet Modelmentioning

confidence: 99%

“…Then we require the real parts of the eigenvalues of the matrix to be smaller than 1/2 [48,[54][55][56]. Under a good approximation, we take the limit θ → 0.…”

Section: Triple-higgs Production In the Higgs Singlet Modelmentioning

confidence: 99%

Probing triple-Higgs productions via4b2γdecay channel at a 100 TeV hadron collider

et al. 2016

View full text Add to dashboard Cite

The quartic self-coupling of the Standard Model Higgs boson can only be measured by observing the triple-Higgs production process, but it is challenging for the LHC Run 2 or ILC at a few TeV because of its extremely small production rate. In this paper, we present a detailed MC simulation study of the triple-Higgs production through gluon fusion at a 100 TeV hadron collider and explore the feasibility of observing this production mode. We focus on the decay channel HHH → bbbbγγ, investigating detector effects and optimizing the kinematic cuts to discriminate the signal from the backgrounds. Our study shows that in order to observe the Standard Model triple-Higgs signal, the integrated luminosity of a 100 TeV hadron collider should be greater than 1.8 × 10 4 ab −1 . We also explore the dependence of the cross section upon the trilinear (λ 3 ) and quartic (λ 4 ) self-couplings of the Higgs. We find that, through a search in the triple Higgs production, the parameters λ 3 and λ 4 can be restricted to the ranges [−1, 5] and [−20, 30], respectively. We also examine how new physics can change the production rate of triple-Higgs events. For example, in the singlet extension of the Standard Model, we find that the triple-Higgs production rate can be increased by a factor of O(10).

show abstract

“…The main goal of this study is to understand the effects of the RGE evolution of the couplings, from the weak scale (the mass of the Z boson, m Z ) to higher scales all the way up to the Planck scale, Λ ¼ 10 19 GeV. Our procedure consists in first inputting a set of 2HDM parameters at the weak scale and verifying whether they satisfy the following theoretical demands:…”

Section: Theoretical Constraints On the Parametrersmentioning

confidence: 99%

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

et al. 2018

View full text Add to dashboard Cite

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.

show abstract

Higgs singlet extension parameter space in the light of the LHC discovery

Cited by 121 publications

References 42 publications

Preserving the validity of the two-Higgs-doublet model up to the Planck scale

Preserving the validity of the two-Higgs-doublet model up to the Planck scale

Probing triple-Higgs productions via4b2γdecay channel at a 100 TeV hadron collider

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

Contact Info

Product

Resources

About