Abstract
We present the most precise value for the Higgs boson crosssection in the gluonfusion production mode at the LHC. Our result is based on a perturbative expansion through N^{3}LO in QCD, in an effective theory where the topquark is assumed to be infinitely heavy, while all other Standard Model quarks are massless. We combine this result with QCD corrections to the crosssection where all finite quarkmass effects are included exactly through NLO. In addition, electroweak corrections and the first corrections in the inverse mass of the topquark are incorporated at three loops. We also investigate the effects of threshold resummation, both in the traditional QCD framework and following a SCET approach, which resums a class of π2 contributions to all orders. We assess the uncertainty of the crosssection from missing higherorder corrections due to both perturbative QCD effects beyond N^{3}LO and unknown mixed QCDelectroweak effects. In addition, we determine the sensitivity of the crosssection to the choice of parton distribution function (PDF) sets and to the parametric uncertainty in the strong coupling constant and quark masses. For a Higgs mass of m _{H} = 125 GeV and an LHC centerofmass energy of 13 TeV, our best prediction for the gluon fusion crosssection is
σ = 48.58pb^{+2.22pb}_{−3.27pb}(theory)±1.56pb(3.20%)(PDF+α_{s}).
σ = 48.58pb^{+2.22pb}_{−3.27pb}(theory)±1.56pb(3.20%)(PDF+α_{s}).
Original language  English 

Article number  58 
Journal  Journal of High Energy Physics 
Volume  2016 
Issue number  5 
DOIs  
Publication status  Published  10 May 2016 
Keywords
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Profiles

Franz Herzog
 School of Physics and Astronomy  UKRI Future Leader Fellowship
Person: Academic: Research Active