Scheme dependence of the next-to-next-to-leading QCD corrections to<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>Γ</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">tot</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mo>(</mml:mo><mml:mrow><mml:msup><mml:mrow><mml:mi>H</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mo>→</mml:mo><mml:mi mathvariant="normal">hadrons</mml:mi><mml:mo>)</mml:mo></mml:ma

Gorishny, S.G.; Kataev, A. L.; Larin, S.A.; Surguladze, Levan R.

doi:10.1103/physrevd.43.1633

Cited by 143 publications

(86 citation statements)

References 42 publications

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“…This program is an extension of HDECAY [93,94], which computes these observables within the SM 4 In this case, the expression for the h → bb EFT decay rate is obtained by applying a scaling of the tree-level prediction. The scaling factor is the same as that used in the SM, and includes the massless QCD corrections up to Oðα 4 s Þ [95][96][97][98][99][100][101][102][103]. This is of course a reasonable procedure, since the QCD corrections to the hbb-vertex involving C bH and C H;kin factorize, and the most accurate predictions should be applied wherever possible.…”

Section: Discussionmentioning

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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Section: Discussionmentioning

confidence: 99%

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

2016

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“…Using as starting points the pole masses M Q , the values of the running b, c masses at the scale µ ∼ 100 GeV are, respectively, ≈ 1.5 and ≈ 2 times smaller than the pole masses. The partial widths, Γ(H → QQ) ∝ m 2 Q (but where additional QCD corrections that are known up to three-loops need to be implemented [9,[95][96][97]), are thus reduced by factors of ≈ 2 and ≈ 4 for Higgs decays into bb and cc, respectively.…”

Section: The Parametric Uncertaintiesmentioning

confidence: 99%

Higgs production at the lHC

Baglio

Djouadi

2011

J. High Energ. Phys.

172

194

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Abstract:We analyze the production of Higgs particles at the early stage of the CERN large Hadron Collider with a 7 TeV center of mass energy (lHC). We first consider the case of the Standard Model Higgs boson that is mainly produced in the gluon-gluon fusion channel and to be detected in its decays into electroweak gauge bosons, gg → H → W W, ZZ, γγ. The production cross sections at √ s = 7 TeV and the decay branching ratios, including all relevant higher order QCD and electroweak corrections, are evaluated. An emphasis is put on the various theoretical uncertainties that affect the production rates: the significant uncertainties from scale variation and from the parametrization of the parton distribution functions as well as the uncertainties which arise due to the use of an effective field theory in the calculation of the next-to-next-to-leading order corrections. The parametric uncertainties stemming from the values of the strong coupling constant and the heavy quark masses in the Higgs decay branching ratios, which turn out to be non-negligible, are also discussed. The implications for different center of mass energies of the proton collider, √ s = 8-10 TeV as well as for the design energy √ s = 14 TeV, are briefly summarized. We then discuss the production of the neutral Higgs particles of the Minimal Supersymmetric extension of the Standard Model in the two main channels: gluon-gluon and bottom quark fusion leading to Higgs bosons which subsequently decay into tau lepton or b-quark pairs, gg, bb → Higgs → τ + τ − , bb. The Higgs production cross sections at the lHC and the decay branching ratios are analyzed. The associated theoretical uncertainties are found to be rather large and will have a significant impact on the parameter space of the model that can be probed.

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“…On the other hand, the next-to-leading-order (NLO) contributions to the scalar and pseudoscalar form factors were known [8][9][10][11] for long and NNLO corrections by employing quark mass expansion to various orders, c.f. [12][13][14][15][16][17][18][19]. A series of papers followed obtaining the two-loop QCD corrections for the vector form factor [20], the axial-vector form factor [21], the anomaly contributions [22] and the scalar and pseudoscalar form factors [23].…”

Section: Introductionmentioning

confidence: 99%