Next-to-leading order QCD predictions for top-quark pair production with up to three jets

Understand

We present theoretical predictions for the production of top-quark pairs with up to three jets at the next-to leading order in perturbative QCD.

• The relevant calculations are performed with Sherpa and OpenLoops.
• To address the issue of scale choices and related uncertainties in the presence of multiple scales, we compare results obtained with the standard scale HT/2 at fixed order and the MINLO procedure.
• Analyzing various cross sections and distributions for tt+0,1,2,3 jets at the 13 TeV LHC we find a remarkable overall agreement between fixed-order and MINLO results.