Electroweak oblique parameters as a probe of the trilinear Higgs boson self-interaction

Kribs, Graham D.; Maier, A. A.; Rzehak, Heidi; Spannowsky, Michael; Waite, Philip

doi:10.1103/physrevd.95.093004

Cited by 56 publications

(60 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As we do not consider precision studies [44][45][46][47][48] or di-Higgs constraints [49][50][51], we neglectc 6 . This list of operators is not exhausting all possibilities [52], but it provides a sufficiently general, while compu-tationally manageable, theoretical framework to gauge the sensitivity to BSM effects in the Higgs sector.…”

Section: Differential Higgs Fits and Uncertaintiesmentioning

confidence: 99%

Higgs characterisation in the presence of theoretical uncertainties and invisible decays

et al. 2017

Self Cite

View full text Add to dashboard Cite

While the Higgs characterisation programme is well under way, direct signs for new physics beyond the Standard Model remain elusive. Performing a fit of fully differential Higgs production cross sections at the LHC to a subset of Higgs-relevant effective operators, we discuss the extent to which theoretical uncertainties can limit the sensitivity in such a new physics search programme. Extending the dimension-6 Higgs Effective Field Theory framework by introducing new light degrees of freedom that can contribute to an invisible (or undetectable) Higgs decay width h → φφ, we show how differential coupling fits can disentangle effects from non-Standard Model couplings and an invisible decay width, as present in many new physics scenarios, such as Higgs-portal dark matter. Including the so-called off-shell measurement that has been advocated as a sensitive determination of the Higgs width in the κ framework, we show explicitly that this method does not provide complementary sensitivity for scale-separated new physics m h m φ , which is favoured in beyond the Standard Model scenarios that relate astrophysics and collider phenomenology in the light of non-observation of new physics during run 1 of the LHC.

show abstract

Section: Differential Higgs Fits and Uncertaintiesmentioning

confidence: 99%

Higgs characterisation in the presence of theoretical uncertainties and invisible decays

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…Due to the smallness of the corresponding production cross sections, it has been recently suggested to additionally harness complementary information on the trilinear Higgs coupling from higher-order contributions to single Higgs boson production [5][6][7][8][9][10] or electroweak precision observables [11,12].…”

Section: Introductionmentioning

confidence: 99%

Higgs boson pair production at NNLO with top quark mass effects

Grazzini

Heinrich

Jones

et al. 2018

J. High Energ. Phys.

167

129

View full text Add to dashboard Cite

We consider QCD radiative corrections to Higgs boson pair production through gluon fusion in proton collisions. We combine the exact next-to-leading order (NLO) contribution, which features two-loop virtual amplitudes with the full dependence on the top quark mass M t , with the next-to-next-to-leading order (NNLO) corrections computed in the large-M t approximation. The latter are improved with different reweighting techniques in order to account for finite-M t effects beyond NLO. Our reference NNLO result is obtained by combining one-loop double-real corrections with full M t dependence with suitably reweighted real-virtual and double-virtual contributions evaluated in the large-M t approximation. We present predictions for inclusive cross sections in pp collisions at √ s = 13, 14, 27 and 100 TeV and we discuss their uncertainties due to missing M t effects. Our approximated NNLO corrections increase the NLO result by an amount ranging from +12% at √ s = 13 TeV to +7% at √ s = 100 TeV, and the residual uncertainty of the inclusive cross section from missing M t effects is estimated to be at the few percent level. Our calculation is fully differential in the Higgs boson pair and the associated jet activity: we also present predictions for various differential distributions at √ s = 14 and 100 TeV, and discuss the size of the missing M t effects, which can be larger, especially in the tails of certain observables. Our results represent the most advanced perturbative prediction available to date for this process.

show abstract

“…This strategy was first applied to ZH production at an e + e − collider in Ref. [4], later to Higgs production and decay modes at the LHC [5][6][7][8][9][10][11] and also to the study of electroweak precision observables [12,13]. Using this strategy a recent analysis of the AT-LAS Collaboration set a more stringent bound, −2.3 λ SM 3 < λ 3 < 10.3 λ SM 3 at 95% C.L., by combining the single Higgs boson analyses targeting the γγ, ZZ , W W , τ + τ − and bb decay channels and the double Higgs boson analyses in the bbbb, bbτ τ and bbγγ decay channels using data collected at √ s = 13 TeV [14].…”

Section: Introductionmentioning

confidence: 99%

The effect of an anomalous Higgs trilinear self-coupling on the $$h \rightarrow \gamma \, Z$$ decay

Degrassi

Vitti

2020

Eur. Phys. J. C

View full text Add to dashboard Cite

We compute the two-loop effects induced by an anomalous Higgs trilinear self-coupling in the partial decay width h → γZ. The computation is performed using the anomalous coupling approach working in the unitary gauge and in a theory in which the anomalous coupling is generated via the addition to the scalar potential part of the Standard Model Lagrangian of an (in)finite tower of (Φ † Φ) n terms. The former computation is automatically finite while the latter requires the renormalization of the lowest order contribution. We discuss the renormalization conditions that should be employed in order to obtain the same result in the two approaches. We find that the h → γZ process is one of the most sensitive mode to an anomalous trilinear Higgs self-coupling. As a by-product of this work we confirm one of two different results present in the literature concerning the contribution of an anomalous Higgs trilinear coupling in the h → γγ decay.

show abstract

Electroweak oblique parameters as a probe of the trilinear Higgs boson self-interaction

Cited by 56 publications

References 52 publications

Higgs characterisation in the presence of theoretical uncertainties and invisible decays

Higgs characterisation in the presence of theoretical uncertainties and invisible decays

Higgs boson pair production at NNLO with top quark mass effects

The effect of an anomalous Higgs trilinear self-coupling on the $$h \rightarrow \gamma \, Z$$ decay

Contact Info

Product

Resources

About