NNLO versus NLO multi-jet merging for top-pair production including electroweak corrections

Understand

In this proceedings we compare phenomenological predictions for differential distributions in top-quark pair production at the LHC.

• In particular we consider NNLO QCD fixed-order predictions and parton-level predictions based on NLO QCD multi-jet merging following the MEPS@NLO scheme.
• In both predictions NLO electroweak (EW) corrections are incorporated in different approximations.
• We focus on several transverse-momentum distributions and on the top-quark invariant mass distribution, both highly relevant for the ongoing physics program at the LHC.