NLO QCD Predictions for off-shell $t\bar{t}$ and $t\bar{t}H$ Production and Decay at a Linear Collider

Abstract

We present predictions for $t\bar{t}$ and $t\bar{t}H$ production and decay at future lepton colliders including non-resonant and interference contributions up to next-to-leading order (NLO) in perturbative QCD. The obtained precision predictions are necessary for a future precise determination of the top-quark Yukawa coupling, and allow for top-quark phenomenology in the continuum at an unprecedented level of accuracy. Simulations are performed with the automated NLO Monte-Carlo framework WHIZARD interfaced to the OpenLoops matrix element generator.

42 pages, 21 figures

References in corpus (21)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Event generation with SHERPA 1.1
• Reducing full one-loop amplitudes to scalar integrals at the integrand level
• OneLOop: for the evaluation of one-loop scalar functions
• Automation of next-to-leading order computations in QCD: the FKS subtraction
• The Probable Fate of the Standard Model
• On the Rational Terms of the one-loop amplitudes
• Scalar one-loop 4-point integrals
• Complete off-shell effects in top quark pair hadroproduction with leptonic decay at next-to-leading order
• NLO QCD corrections to WWbb production at hadron colliders
• NLO QCD corrections to off-shell top-antitop production with leptonic decays at hadron colliders
• Reconstruction of heavy quark current correlators at O(α_s^3)
• NLO electroweak corrections to off-shell top-antitop production with leptonic decays at the LHC
• Top-quark forward-backward asymmetry in e+e- annihilation at NNLO in QCD
• QCD in the Color-Flow Representation
• Feynman rules for the rational part of the Electroweak 1-loop amplitudes in the R_xi gauge and in the Unitary gauge
• NLO Event Generation for Chargino Production at the ILC
• Two-Parton Contribution to the Heavy-Quark Forward-Backward Asymmetry in NNLO QCD
• R2SM: a package for the analytic computation of the R2 Rational terms in the Standard Model of the Electroweak interactions
• Full simulation study of the top Yukawa coupling at the ILC at $\sqrt{s}$ = 1 TeV
• One-loop QCD corrections to the $e^{+}{e}^{-}\to W^{+}{W}^{-}b\bar{b}$ process at the ILC

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• New developments in the Whizard event generator
• Revisiting the top-quark pair production at future $e^{+}{e}^{-}$ colliders
• Monte Carlo Event Generators
• Challenges for Monte Carlo generators
• Chasing the two-Higgs-doublet model via electroweak corrections at $e^{+}{e}^{-}$ colliders
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