Combined NLO EW and QCD corrections to off-shell $\text{t}\overline{\text{t}}\text{W}$ production at the LHC

TL;DR

This paper presents a comprehensive calculation combining NLO QCD and electroweak corrections for off-shell top-antitop-W production at the LHC, enhancing the precision of theoretical predictions for future high-luminosity measurements.

Contribution

It is the first to combine NLO QCD and electroweak corrections for off-shell t-tbar-W production, including all relevant effects and spin correlations.

Findings

Improved theoretical accuracy for t-tbar-W production at the LHC.

Quantitative assessment of electroweak and QCD correction impacts.

Enhanced modeling for future experimental analyses.

Abstract

The high luminosity that will be accumulated at the LHC will enable precise differential measurements of the hadronic production of a top--antitop-quark pair in association with a $\text{W}$ boson. Therefore, an accurate description of this process is needed for realistic final states. In this work we combine for the first time the NLO QCD and electroweak corrections to the full off-shell $\text{t}\overline{\text{t}}{\text{W}}^+$ production at the LHC in the three-charged-lepton channel, including all spin correlations, non-resonant effects, and interferences. To this end, we have computed the NLO electroweak radiative corrections to the leading QCD order as well as the NLO QCD corrections to both the QCD and the electroweak leading orders.