Simulated e+e- -> ttbar + jet events at 500 GeV and 3 TeV show future lepton colliders could limit top-quark SMEFT Wilson coefficients down to 10^-3 to 10^-4 at 95% CL.
Probing of $Wtb$ Anomalous Couplings via the $tW$ Channel of Single Top Production
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abstract
The potential of LHC for investigation of the $W$-$t$-$b$ vertex through the $tW$ channel of single top quark production is studied. Unlike the other two single top quark production processes ($t-$channel and $s-$channel), the $tW$ channel provides the possibility to study the $Wtb$ vertex without receiving contamination from FCNC. This study has been done at parton level but is involved the separation of signal from backgrounds when both $W$-bosons decay to leptons. In this study $\mathcal{CP}$ is assumed to be conserved. The 68% C.L. bounds on the non-Standard Model couplings are estimated.
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Constraining the top quark effective field theory using the top quark pair production in association with a jet at future lepton colliders
Simulated e+e- -> ttbar + jet events at 500 GeV and 3 TeV show future lepton colliders could limit top-quark SMEFT Wilson coefficients down to 10^-3 to 10^-4 at 95% CL.