One-loop QCD corrections to the $e^{+}{e}^{-}\to W^{+}{W}^{-}b\bar{b}$ process at the ILC

Abstract

We study the full contributions at the leading order(LO) and QCD next-to-leading order(NLO) to the cross section of the \eewwbb process in the standard model(SM) at the ILC. In dealing the resonance problem we adopted the complex mass scheme in both tree-level and one-loop level perturbative calculations. Our numerical results show that the K-factor varies from 1.501 to 0.847 when $\sqrt{s}$ goes up from $360GeV$ to $1.5TeV$. We investigate the dependence of the LO and QCD NLO corrected cross sections of process \eewwbb on colliding energy $\sqrt{s}$ and Higgs-boson mass. We also present the results of the LO and QCD NLO corrected distributions of the transverse momenta of final particles, and the invariant masses of $Wb$-, $b\bar{b}$- and $WW$-pair.

16 pages, 11 figures

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• Probing the top-quark width through ratios of resonance contributions of $e^{+}{e}^{-}\to W^{+}{W}^{-}b\bar{b}$
• Automated NLO QCD Corrections with WHIZARD
• NLO QCD corrections to off-shell top-antitop production with semi-leptonic decays at lepton colliders
• SUSY QCD impact on top-pair production associated with a $Z^0$-boson at a photon-photon collider
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