NLO QCD corrections to off-shell top–antitop production with semi-leptonic decays at lepton colliders Ansgar Denner, Mathieu Pellen and Giovanni Pelliccioli Eur. Phys. J. C, 83 5 (2023) 353 Published online: 03 May 2023 DOI: 10.1140/epjc/s10052-023-11500-3