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

Abstract

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. We discuss comparisons between the different considered approximations and their advantages and disadvantages for different distributions.

Comments: 5 pages plus references, 3 figures, Proceedings of the 11th International Workshop on Top Quark Physics, Bad Neuenahr, Germany, September 2018