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

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

2008-02-28

arxiv.org/abs/0802.4124v2

Phys.Lett.B662:150-157,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 11 figures

Scientific paper

10.1016/j.physletb.2008.02.058

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 $360 GeV$ to $1.5 TeV$. 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.

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