Next-to-leading order QCD corrections for single top-quark production in association with two jets

Abstract

In this article we calculate the next-to-leading order (NLO) QCD corrections for single on-shell top-quark production in association with two jets at proton-proton colliders. The tW channel is assumed to be measured independently. The QCD corrections to the inclusive cross section are about 28 (22)% for top (anti-top) quark production at the 13 TeV LHC. Theoretical errors are dominated by scale uncertainties, which are found to be around 5% at NLO. Results for various kinematical distributions are also provided using a well-motivated dynamical scale. The QCD corrections are found to have a non-trivial dependence on the phase-space.

Precise predictions for single-top production: the impact of EW corrections and QCD shower on the t-channel signature

“…On the theoretical front, predictions for t-channel single-top quark production have been known at the NLO accuracy in QCD for quite some time [30][31][32][33] in the five flavour scheme (5FS), and for about ten years in the four-flavour scheme (4FS) [34][35][36]. Much more recently, also the NNLO corrections have been computed [37], also including the decay of the top quark in the narrow width approximation up to the same level of accuracy, but neglecting some interference contributions in the NNLO corrections [38,39].…”

Les Houches 2021—physics at TeV colliders: report on the standard model precision wishlist

“…NLO QCD corrections to t-channel electroweak W + bj production available within MG5_aMC@NLO [835,836]; NLO QCD corrections to single-top production in the t, s and tW channels also available in SHERPA [837] and in POWHEG [838,839]; NLO EW corrections known [840]. NLO QCD for single topquark production in association with two jets [841]. NLO QCD matched to parton shower for single top-quark production in association with a jet in the MINLO method [842]; Soft-gluon resummation at NLL for single-top production in the tchannel [843] and the s-channel modes [844].…”