Detecting and studying Higgs bosons at a photon-photon collider

Asner, D. M.; Gronberg, J.; Gunion, John F.

doi:10.1103/physrevd.67.035009

Cited by 65 publications

(97 citation statements)

References 30 publications

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“…6 In order to gain confidence in our method we checked our procedure on the one-loop expansions, Eqs. (7,8), and compared with the exact results, Eqs. (4,5).…”

Section: Numerical Resultsmentioning

confidence: 99%

“…While none of the above measurements alone can provide information on the partial width (what is measured is σ(pp → H)· Br(H → γγ)), their combination with signals in other decay modes, will allow a determination of the total width of the Higgs and of the couplings with a precision of 10-40% [5]. A much better determination of the Higgs width into two photons could be achieved at a e + e − linear collider, via the fusion process γγ → H, with the photons generated by Compton-back scattering of laser light [6,7]. In this case, it has been shown that σ(γγ → H)· Br(H → bb) could be measured to a precision of a few percents [8], providing an almost direct determination of the width of H → γγ (the Br(H → bb) is large for intermediate Higgs masses and therefore quite insensitive to the total width).…”

Section: Introductionmentioning

confidence: 99%

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Two-loop electroweak corrections to the Higgs-boson decay

Degrassi

Maltoni

2005

Nuclear Physics B

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The complete set of two-loop electroweak corrections to the decay width of the Higgs boson into two photons is presented. Two-loop contributions involving weak bosons and the top quark are computed in terms of an expansion in the Higgs external momentum. Adding these results to the previously known light fermion contributions, we find that the total electroweak corrections for a Higgs boson with 100 GeV m H 150 GeV are moderate and negative, between −4% δ EW 0%. Combination with the QCD corrections, which are small and positive, gives a total correction to the one-loop results of |δ EW +QCD | 1.5%.

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“…6 In order to gain confidence in our method we checked our procedure on the one-loop expansions, Eqs. (7,8), and compared with the exact results, Eqs. (4,5).…”

Section: Numerical Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Two-loop electroweak corrections to the Higgs-boson decay

Degrassi

Maltoni

2005

Nuclear Physics B

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“…A future linear collider will be able to see and carefully study a Higgs with mass m h < ∼ √ s − m Z in e + e − mode, and perhaps slightly higher in γγ mode [38,39,40]. Indications of SU(3) electroweak unification could also come from direct collider probes and precision electroweak studies that match expectations [41] of minimal models and beyond.…”

Section: B the Next-to-minimal Supersymmetric Standard Modelmentioning

confidence: 99%

Higgs boson mass limits in perturbative unification theories

Tobe

Wells

2002

Phys. Rev. D

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Motivated in part by recent demonstrations that electroweak unification into a simple group may occur at a low scale, we detail the requirements on the Higgs mass if the unification is to be perturbative. We do this for the Standard Model effective theory, minimal supersymmetry, and next-to-minimal supersymmetry with an additional singlet field. Within the Standard Model framework, we find that perturbative unification with sin 2 θ W = 1/4 occurs at Λ = 3.8 TeV and requires m h < ∼ 460 GeV, whereas perturbative unification with sin 2 θ W = 3/8 requires m h < ∼ 200GeV. In supersymmetry, the presentation of the Higgs mass predictions can be significantlysimplified, yet remain meaningful, by using a single supersymmetry breaking parameter ∆ S . We present Higgs mass limits in terms of ∆ S for the minimal supersymmetric model and the next-tominimal supersymmetric model. We show that in next-to-minimal supersymmetry, the Higgs mass upper limit can be as large as 500 GeV even for moderate supersymmetry masses if the perturbative unification scale is low (Λ ≃ 10 TeV).

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“…There are several design proposals for a collider with such capabilities, such as a linear/circular e þ e − machine [20,21], muon-collider [22,23], or γγ machine [24,25]. Although the proposed physics programs are different in each case, the common goal is to achieve Oð%Þ level precision on the measurement of Higgs couplings.…”

Section: Introductionmentioning

confidence: 99%

QCD radiative corrections for h→bb¯ in the standard model dimension-6 effective field theory

2016

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. (2016) 'QCD radiative corrections for hbb in the standard model dimension-6 e ective eld theory.', Physical review D., 94 (7). 074045.Further information on publisher's website:https://doi.org/10.1103/PhysRevD.94.074045Publisher's copyright statement:Reprinted with permission from the American Physical Society: Physical Review D 94, 074045 c (2016) by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modi ed, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society. Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. We calculate the Oðα s Þ QCD corrections to the inclusive h → bb decay rate in the dimension-6 standard model effective field theory (SMEFT). The QCD corrections multiplying the dimension-6 Wilson coefficients which alter the hbb-vertex at tree-level are proportional to the standard model (SM) ones, so next-to-leading order results can be obtained through a simple rescaling of the tree-level decay rate. On the other hand, contributions from the operators Q bG and Q HG , which alter the gbb-vertex and introduce a hgg-vertex respectively, enter at Oðα s Þ and induce sizeable corrections which are unrelated to the SM ones and cannot be anticipated through a renormalization-group analysis. We present compact analytic results for these contributions, which we recommend to be included in future phenomenological studies.

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Detecting and studying Higgs bosons at a photon-photon collider

Cited by 65 publications

References 30 publications

Two-loop electroweak corrections to the Higgs-boson decay

Two-loop electroweak corrections to the Higgs-boson decay

Higgs boson mass limits in perturbative unification theories

QCD radiative corrections for h→bb¯ in the standard model dimension-6 effective field theory

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