Higgs factories: Higgsstrahlung versus 
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 fusion

Lafaye, R.; Plehn, Tilman; Rauch, Michael; Zerwas, D.

doi:10.1103/physrevd.96.075044

Cited by 14 publications

(11 citation statements)

References 87 publications

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“…The kappa framework features the simple and direct connection to measurable cross sections and a straight forward inclusion of new light degree of freedom beyond the SM, e.g., exotic Higgs decays [6][7][8]. Deviation of κ i from their SM expectation indicates contributions from new physics [9][10][11][12][13][14][15][16][17][18][19][20]. Another approach using the language of the Standard Model Effective Field Theory (SMEFT) for Higgs couplings has also been extensively studied, both at the LHC and at future colliders [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Learning from Higgs physics at future Higgs factories

Liu

et al. 2017

J. High Energ. Phys.

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Future Higgs factories can reach impressive precision on Higgs property measurements. In this paper, instead of conventional focus of Higgs precision in certain interaction bases, we explore its sensitivity to new physics models at the electron-positron colliders. In particular, we study two categories of new physics models, Standard Model (SM) with a real scalar singlet extension, and Two Higgs Double Model (2HDM) as examples of weakly-interacting models, Minimal Composite Higgs Model (MCHM) and three typical patterns of the more general operator counting for strong interacting models as examples of strong dynamics. We perform a global fit to various Higgs search channels to obtain the 95% C.L. constraints on the model parameter space. In the SM with a singlet extension, we obtain the limits on the singlet-doublet mixing angle sin θ, as well as the more general Wilson coefficients of the induced higher dimensional operators. In the 2HDM, we analyze tree level effects in tan β vs. cos(β − α) plane, as well as the one-loop contributions from the heavy Higgs bosons in the alignment limit to obtain the constraints on heavy Higgs masses for different types of 2HDM. In strong dynamics models, we obtain lower limits on the strong dynamics scale. In addition, once deviations of Higgs couplings are

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Section: Introductionmentioning

confidence: 99%

Learning from Higgs physics at future Higgs factories

Liu

et al. 2017

J. High Energ. Phys.

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“…very challenging at the LHC [27], future lepton colliders provide an avenue to study these interactions at a reasonably good precision due to cleaner environment [28]. There have been several proposals for next-generation e + e − colliders that are under active studies, including the Circular Electron-Positron Collider (CEPC) [29,30], the Future Circular Collider (FCC-ee) [31], the Compact Linear Collider (CLIC) [32,33], and the International Linear Collider (ILC) [34][35][36].…”

Section: Jhep02(2018)007mentioning

confidence: 99%

Higgs production at future e+e− colliders in the Georgi-Machacek model

Han

Liao

2018

J. High Energ. Phys.

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We study how the dominant single and double SM-like Higgs (h) production at future e + e − colliders is modified in the Georgi-Machacek (GM) model. On imposing theoretical, indirect and direct constraints, significant deviations of h-couplings from their SM values are still possible; for instance, the Higgs-gauge coupling can be corrected by a factor κ hV V ∈ [0.93, 1.15] in the allowed parameter space. For the Higgs-strahlung e + e − → hZ and vector boson fusion processes e + e − → hνν, he + e − , the cross section could increase by 32% or decrease by 13%. In the case of associated production with a top quark pair e + e − → htt, the cross section can be enhanced up to several times when the custodial triplet scalar H 0 3 is resonantly produced. In the meanwhile, the double Higgs production e + e − → hhZ (hhνν) can be maximally enhanced by one order of magnitude at the resonant H 0 1,3 production. We also include exclusion limits expected from future LHC runs at higher energy and luminosity and discuss their further constraints on the relevant model parameters. We find that the GM model can result in likely measurable deviations of Higgs production from the SM at future e + e − colliders.

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“…There are three major proposals for the lepton colliders, the Circular Electron Positron Collider (CEPC) [13], the Future Circular Collider (FCC-ee) [14], and the International Linear Collider (ILC) [15]. At the e + e − collider, Γ h could be probed indirectly with a high accuracy by the measurements of Higgs production rates and the decay branching ratios [16][17][18][19][20][21][22]. For example, Γ h could be measured through the e + e − → Zh(→ ZZ * ) production channel, i.e.,…”

Section: Introductionmentioning

confidence: 99%

Determining Higgs boson width at electron-positron colliders

Yan

2021

Preprint

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Probing Higgs width Γ h is critical to test the Higgs properties. In this work we propose to measure Γ h at the e + e − collider with a model-independent analysis under the Standard Model Effective Field Theory framework. We demonstrate that making use of the cross section measurements from e + e − → Zh, e + e − → ν e νe h production and Higgs decay branching ratios h → W W * /ZZ * /γγ, one could determine Γ h at a percentage level with a center of mass energy √ s = 250 and 350 GeV and integrated luminosity 5 ab −1 . This conclusion would not depend on the assumption of the fermion Yukawa interactions. We further apply this result to constrain the fermion Yukawa couplings and it shows that the couplings could be well constrained.

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Higgs factories: Higgsstrahlung versus W fusion

Cited by 14 publications

References 87 publications

Learning from Higgs physics at future Higgs factories

Learning from Higgs physics at future Higgs factories

Higgs production at future e+e− colliders in the Georgi-Machacek model

Determining Higgs boson width at electron-positron colliders

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