NLO QCD corrections to the production of t-tbar-Z in gluon fusion

Abstract

We compute the O(alpha_s) QCD corrections to the partonic process gg -> t-tbar-Z at the LHC. This partonic channel is the dominant component of the scattering process pp -> t-tbar-Z, which will be important for measuring the t-tbar-Z electroweak couplings. The O(alpha_s) corrections increase the total cross section by up to 75% for reasonable choices of the renormalization and factorization scales. Inclusion of these contributions descreases the residual scale dependence of the cross section coming from uncalculated higher order terms to +-5%.

9 pages, 4 figures

References in corpus (5)

• Reducing full one-loop amplitudes to scalar integrals at the integrand level
• Numerical integration of one-loop Feynman diagrams for N-photon amplitudes
• QCD corrections to tri-boson production
• All One-loop Maximally Helicity Violating Gluonic Amplitudes in QCD
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Cited by in corpus (8)

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• Top-quark charge asymmetry and polarization in $t\bar{t}{W}^{\pm }$ production at the LHC
• The one-loop gluon amplitude for heavy-quark production at NNLO
• NLO QCD corrections to Z b anti-b production with massive bottom quarks at the Fermilab Tevatron
• Renormalization group improved predictions for $t\bar{t}{W}^{\pm }$ production at hadron colliders