Effect of fermionic operators on the gauge legacy of the LHC Run I

Alves, Alexandre; Agostinho, Nuno Rosa; Éboli, Oscar José Pinto; Gonzalez-Garcia, M. C.

doi:10.1103/physrevd.98.013006

Cited by 22 publications

(35 citation statements)

References 39 publications

(58 reference statements)

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“…Translating the tree level results of Ref. [49] into our notation, we have for Λ = 1 T eV , From Fig. 3, the limit on C W from H → γγ assuming that C W is the only non-zero coefficient is | C W |< 0.3, significantly weaker than the limit from gauge boson pair production.…”

Section: H → γγmentioning

confidence: 96%

Electroweak corrections to Higgs boson decays to γγ and W+W− in sta

Dawson

Giardino

2018

Phys. Rev. D

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Higgs decays to gauge boson pairs are a crucial ingredient in the study of Higgs properties, with the decay H → γγ being particularly sensitive to new physics effects. Assuming all potential new physics occurs at energies much above the weak scale, deviations from Standard Model predictions can be parameterized in terms of the coefficients of an effective field theory (SMEFT). When experimental limits on the SMEFT coefficients reach an accuracy of a few percent, predictions must be done beyond the lowest order in the SMEFT in order to match theory and experimental accuracy. This paper completes a program of computing the one-loop electroweak SMEFT corrections to H → V V , V = W ± , Z, γ. The calculation of the real contribution to H → W + W − γ is performed by mapping two-loop amplitudes to the 3− body phase space.

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Section: H → γγmentioning

confidence: 96%

Electroweak corrections to Higgs boson decays to γγ and W+W− in sta

Dawson

Giardino

2018

Phys. Rev. D

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“…where r, r , λ, λ label the respective particle helicities, have the high energy limits [9,[11][12][13][31][32][33],…”

Section: A Effective Gauge and Fermion Interactionsmentioning

confidence: 99%

NLO effects in EFT fits to W+W− production at the LHC

2019

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We study the impact of anomalous gauge boson and fermion couplings on the production of W + W − pairs at potential future LHC upgrades and estimate the sensitivity at √ S = 14 TeV with 3 ab −1 and √ S = 27 TeV with 15 ab −1 . A general technique for including NLO QCD effects in effective field theory (EFT) fits to kinematic distributions is presented, and numerical results are given for √ S = 13 TeV W + W − production. Our method allows fits to anomalous couplings at NLO accuracy in any EFT basis and has been implemented in a publicly available version of the POWHEG-BOX. Analytic expressions for the K-factors relevant for 13 TeV total cross sections are given for the HISZ and Warsaw EFT bases and differential K-factors can be obtained using the supplemental material. Our study demonstrates the necessity of including anomalous Zfermion couplings in the extraction of limits on anomalous 3-gauge-boson couplings.

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“…Now the higgs decays to SM fermions and gauge bosons fermions have been constrained [94][95][96], one can use Higgs data to place important limits on the model.…”

Section: Lhc-higgsmentioning

confidence: 99%

Neutrino masses in a two Higgs doublet model with a U(1) gauge symmetry

Camargo

Dias

Melo

et al. 2019

J. High Energ. Phys.

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General Two Higgs Doublet Models (2HDM) are popular Standard Model extensions but feature flavor changing interactions and lack neutrino masses. We discuss a 2HDM where neutrino masses are generated via type I seesaw and propose an extension where neutrino masses are generated via a type II seesaw mechanism with flavor changing interactions being absent via the presence of a U(1) gauge symmetry. After considering a variety of bounds such as those rising from collider and electroweak precision we show that our proposal stands as a UV complete 2HDM with a dark photon where neutrino masses and flavor changing interactions are addressed. A possible dark matter realization is also discussed.

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Effect of fermionic operators on the gauge legacy of the LHC Run I

Cited by 22 publications

References 39 publications

Electroweak corrections to Higgs boson decays to γγ and W+W− in sta

Electroweak corrections to Higgs boson decays to γγ and W+W− in sta

NLO effects in EFT fits to W+W− production at the LHC

Neutrino masses in a two Higgs doublet model with a U(1) gauge symmetry

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