Gluon-induced Higgs-strahlung at next-to-leading order QCD

By Lukas Altenkamp, Stefan Dittmaier, Robert V. Harlander, Heidi Rzehak, Tom J. E. Zirke. 2012

291 citations recorded by the source corpus.

A bstractGluon-induced contributions to the associated production of a Higgs and a Z boson are calculated with NLO accuracy in QCD. They constitute a significant contribution to the cross section for this process. The perturbative correction factor (K-factor) is calculated in the limit of infinite top-quark and vanishing bottom-quark masses. The qualitative similarity of the results to the well-known ones for the gluon-fusion process gg → H allows to conclude that rescaling the LO prediction by this K-factor leads to a reliable NLO result and realistic error estimate due to missing higher-order perturbative effects. We consider the total inclusive cross section as well as a scenario with a boosted Higgs boson, where the Higgs boson’s transverse momentum is restricted to values pT,H> 200 GeV. In both cases, we find large correction factors K ≈ 2 in most of the parameter space.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/0de3f574055d7f163fa8857f336179481c7e12e4

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Citations in the corpus

Associated production of a Higgs boson at NNLO (2016, background): “[56] and further improved through soft gluon resummation in ref.”
Higgs Physics at the HL-LHC and HE-LHC (2019, methodology): “The results have been obtained using HAWK, combining NNLO QCD and NLO EW corrections [64, 63, 65, 66, 67, 68, 69], by means of a multiplicative scheme, as described in the YR4 studies (eq.”
Collider physics at the precision frontier (2020, methodology): “[217] they have been calculated in the mt → ∞ limit, leading to a K-factor to reweight the full one-loop result.”
Search for exclusive Higgs and Z boson decays to ϕγ and ργ with the ATLAS detector (2017, methodology): “The W H and Z H production rates are normalised to cross sections calculated at NNLO in QCDwith NLO electroweak corrections [50, 51] including the NLOQCD corrections [52] for gg → Z H .”
Measurements of the Higgs boson production and decay rates and coupling strengths using pp collision data at \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\o (2015, unknown): “The cross sections of the W H and Z H (qq̄ → Z H ) are calculated including QCD corrections up to NNLO [53,54] and EW corrections up to NLO [55,56] whereas the cross section of the gg → Z H process is calculated up to NLO in QCD corrections [57,58].”
Handbook of LHC Higgs Cross Sections: 3. Higgs Properties (2013, background): “This uncertainty has been reduced recently [153] upon adding the NLO corrections to the gg channel in the heavy-top-quark limit (which is the dominant contribution of NNNLO to the pp cross section).”
Soft gluon resummation for gluon-induced Higgs Strahlung (2014, methodology): “where the virtual cross section at NLO has been evaluated in the limit of an infinitely heavy top quark [19]:”
Les Houches 2013: Physics at TeV Colliders: Standard Model Working Group Report (2014, background): “The gg → HZ channel, which is known [48] at NLO QCD in the infinite-mt limit for the total cross section, contributes about 14% to the cross section at the LHC for 14 TeV and significantly increases the scale uncertainty.”
Les Houches 2017: Physics at TeV Colliders Standard Model Working Group Report (2017, methodology): “[265], where the K-factor is obtained in the limit mt →∞ and mb = 0, and then used to rescale the full (one-loop) LO cross section.”