Higgs Boson studies at future particle colliders

Blas, Jorge de; Cepeda, M.; D’Hondt, J.; Ellis, R. Keith; Grojean, Christophe; Heinemann, B.; Maltoni, Fabio; Nisati, A.; Petit, E.; Rattazzi, Riccardo; Verkerke, W.

doi:10.1007/jhep01(2020)139

Cited by 292 publications

(367 citation statements)

References 111 publications

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“…The ILC results at 500 GeV agree -by construction-with the summary of the Higgs/EW group for the 2020 update of the European strategy for particle physics in Ref. [90]. The results for operation at 550 GeV and 1 TeV extend the study to higher energy.…”

Section: Summary Of Resultssupporting

confidence: 76%

The electro-weak couplings of the top and bottom quarks — Global fit and future prospects

Durieux¹,

Quiles²,

Miralles³

et al. 2019

J. High Energ. Phys.

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We evaluate the implications of LHC and LEP/SLC measurements for the electro-weak couplings of the top and bottom quarks. We derive global bounds on the Wilson coefficients of ten two-fermion operators in an effective field theory description. The combination of hadron collider data with Z-pole measurements is found to yield tight limits on the operator coefficients that modify the left-handed couplings of the bottom and top quark to the Z boson. We also present projections for the high-luminosity phase of the LHC and for future electron-positron colliders. The bounds on the operator coefficients are expected to improve substantially during the remaining LHC programme, by factors of 1 to 5 if systematic uncertainties are scaled as statistical ones. The operation of an e + e − collider at a center-of-mass energy above the top-quark pair production threshold is expected to further improve the bounds by one to two orders of magnitude. The combination of measurements in pp and e + e − collisions allows for a percent-level determination of the top-quark Yukawa coupling, that is robust in a global fit.

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Section: Summary Of Resultssupporting

confidence: 76%

The electro-weak couplings of the top and bottom quarks — Global fit and future prospects

Durieux¹,

Quiles²,

Miralles³

et al. 2019

J. High Energ. Phys.

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show abstract

“…ref. [6]. Therefore, we only restrict ourselves to varying the diagonal light quark Higgs couplings, writing…”

Section: Effective Field Theory Of Light Yukawa Couplingsmentioning

confidence: 99%

Probing Higgs couplings to light quarks via Higgs pair production

Alasfar

Corral

Gröber

2019

J. High Energ. Phys.

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One of the puzzles of the SM is the large hierarchy between the Yukawa couplings of different flavours. Yukawa couplings of the first and the second generation are constrained only very weakly so far. However, one can obtain large deviations in the Yukawa couplings in several New Physics (NP) models, such as e.g. models with new vector-like quarks, or new Higgs bosons that couple naturally to individual fermion families. In this work, we investigate the potential bounds on the NP Higgs Yukawa couplings modification κ f for light quarks from double-Higgs at the LHC, starting from a model independent formalism. We have looked at the two Higgs boson final state bbγγ, and the relevant experimental cuts to reduce backgrounds and estimated the potential exclusion bounds for κ f . We have considered both linear and non-linear effective field theory for the Higgs light quark coupling modifications.

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“…State-of-the-art values for the expected accuracies for the ratio κ λ at almost all envisioned future colliders can be found in Ref. [41].…”

Section: Introductionmentioning

confidence: 99%

“…[43] to be able to attain 0.54 < λ hhh /λ SM hhh < 1.46 (at 68% CL) using 15 ab −1 of data. 2 Turning next to the case of possible future lepton colliders, the initial stage of the International Linear Collider (ILC) running at √ s = 250 GeV cannot access λ hhh directly via double-Higgs production [46], but could obtain a measurement to 49% accuracy, at 68% CL, in a single-Higgs production analysis using 2 ab −1 of data [41]. With the data from further ILC extensions to 500 GeV (4 ab −1 ) or even 1 TeV (8 ab −1 ), it could be possible to reach a precision of 27% or 10% respectively [47] (once again at 68% CL).…”

Section: Introductionmentioning

confidence: 99%

Leading two-loop corrections to the Higgs boson self-couplings in models with extended scalar sectors

Braathen

Kanemura

2020

Eur. Phys. J. C

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We compute the dominant two-loop corrections to the Higgs trilinear coupling λ hhh and to the Higgs quartic coupling λ hhhh in models with extended Higgs sectors, using the effective-potential approximation.We provide in this paper all necessary details about our calculations, and present general MS expressions for derivatives of the integrals appearing in the effective potential at two loops. We also consider three particular Beyond-the-Standard-Model (BSM) scenarios -namely a typical scenario of an Inert Doublet Model (IDM), and scenarios of a Two-Higgs-Doublet Model (2HDM) and of a Higgs Singlet Model (HSM) without scalar mixing -and we include all the necessary finite counterterms to obtain (in addition to MS results) on-shell scheme expressions for the corrections to the Higgs self-couplings. With these analytic results, we investigate the possible magnitude of two-loop BSM contributions to the Higgs self-couplings and the fate of the non-decoupling effects that are known to appear at one loop. We find that, at least as long as pertubative unitarity conditions are fulfilled, the size of two-loop corrections remains well below that of one-loop corrections. Typically, two-loop contributions to λ hhh amount to approximately 20% of those at one loop, implying that the non-decoupling effects observed at one loop are not significantly modified, but also meaning that higher-order corrections need to be taken into account for the future perspective of precise measurements of the Higgs trilinear coupling.

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Higgs Boson studies at future particle colliders

Cited by 292 publications

References 111 publications

The electro-weak couplings of the top and bottom quarks — Global fit and future prospects

The electro-weak couplings of the top and bottom quarks — Global fit and future prospects

Probing Higgs couplings to light quarks via Higgs pair production

Leading two-loop corrections to the Higgs boson self-couplings in models with extended scalar sectors

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