Impact of QED corrections to Higgs decay into four leptons at the LHC

Calame, C. M. Carloni; Moretti, M.; Montagna, G.; Nicrosini, O.; Piccinini, F.; Polosa, A. D.

doi:10.1016/j.nuclphysbps.2006.03.010

Cited by 8 publications

(7 citation statements)

References 15 publications

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“…First results of this calculation had already been presented at the RADCOR05 conference [17]. At this conference also progress on an independent calculation of the electromagnetic corrections to H → ZZ → 4 leptons has been reported by Carloni Calame et al [18]. The analytic results demonstrated in Ref.…”

Section: Introductionmentioning

confidence: 83%

Radiative corrections to the semileptonic and hadronic Higgs-boson decays H→WW/ZZ→4 fermions

Bredenstein

Denner

Dittmaier

et al. 2007

J. High Energy Phys.

194

176

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Abstract:The radiative corrections of the strong and electroweak interactions are calculated for the Higgs-boson decays H → WW/ZZ → 4f with semileptonic or hadronic four-fermion final states in next-to-leading order. This calculation is improved by higher-order corrections originating from heavy-Higgs-boson effects and photonic final-state radiation off charged leptons. The W-and Z-boson resonances are treated within the complex-mass scheme, i.e. without any resonance expansion or on-shell approximation. The calculation essentially follows our previous study of purely leptonic final states. The electroweak corrections are similar for all four-fermion final states; for integrated quantities they amount to some per cent and increase with growing Higgs-boson mass M H , reaching 7-8% at M H ∼ 500 GeV. For distributions, the corrections are somewhat larger and, in general, distort the shapes. Among the QCD corrections, which include corrections to interference contributions of the Born diagrams, only the corrections to the squared Born diagrams turn out to be relevant. These contributions can be attributed to the gauge-boson decays, i.e. they approximately amount to α s /π for semileptonic final states and 2α s /π for hadronic final states. The discussed corrections have been implemented in the Monte Carlo event generator Prophecy4f. †

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Section: Introductionmentioning

confidence: 83%

Radiative corrections to the semileptonic and hadronic Higgs-boson decays H→WW/ZZ→4 fermions

Bredenstein

Denner

Dittmaier

et al. 2007

J. High Energy Phys.

194

176

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show abstract

“…We find that the total widths are about one order of magnitude larger than that of H → ℓ lγ [23][24][25][26][27][28][29] and H → ν ℓ νℓ γ [37,38] processes, respectively. The NLO corrections, which are about 9% for H → ℓ lZ and 5% for H → ν ℓ νℓ Z, are more significant than that of H →4 leptons [30][31][32] and H → ν e eW [39] processes. With a total Higgs width of 4.1 MeV [40], we then have the branching fractions:…”

Section: Numerical Resultsmentioning

confidence: 94%

“…Although the Higgs to four leptons processes have been studied at NLO in Refs. [30][31][32], our investigation here is phenomenologically meaningful for following three reasons:…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Higgs boson decays to a lepton pair and a $Z$ boson

Chen¹,

Feng²,

Qiao³

2021

Preprint

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The discovery of the Standard Model (SM) Higgs boson at the LHC completed the theory of electroweak and strong interactions. To determine the Higgs boson's intrinsic properties, more measurements on its various decay channels are still necessary. In this paper, we investigate H → ℓ lZ and H → ν ℓ νℓ Z (with ℓ = e, µ, τ ) processes at the next-to-leading order electroweak accuracy. The total decay widths, and the differential decay rates with respect to various kinematic variables are obtained. For a typical choice of cut on the invariant mass of lepton pair, we find the branching ratios B(H → ℓ lZ) = 7.5 × 10 −4 (with ℓ = e, µ), B(H → τ − τ + Z) = 7.3 × 10 −4 , and B(H → ν ℓ νℓ Z) = 1.5 × 10 −3 (with ℓ = e, µ, τ ), which are attainable in the LHC experiments.

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“…Parallel to our work, another generator for H → ZZ → 4f , including electromagnetic corrections only, has been introduced in Ref. [7].…”

Section: Introductionmentioning

confidence: 99%

Precision calculations for the Higgs decays H → ZZ/WW → 4 leptons

Bredenstein

Denner

Dittmaier

et al. 2006

Nuclear Physics B - Proceedings Supplements

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Extending earlier work, we provide predictions obtained with the Monte Carlo generator PROPHECY4f for the decays H → ZZ/WW → 4l including the complete electroweak O(α) corrections and some higher-order improvements. The gauge-boson resonances are described in the complex-mass scheme. Here, particular attention is paid to a comparison of different final states with identical charges, such as e + e − µ + µ − and µ + µ − µ + µ − .

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Impact of QED corrections to Higgs decay into four leptons at the LHC

Cited by 8 publications

References 15 publications

Radiative corrections to the semileptonic and hadronic Higgs-boson decays H→WW/ZZ→4 fermions

Radiative corrections to the semileptonic and hadronic Higgs-boson decays H→WW/ZZ→4 fermions

Higgs boson decays to a lepton pair and a $Z$ boson

Precision calculations for the Higgs decays H → ZZ/WW → 4 leptons

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