Details

Autor(en) / Beteiligte

• Höche, S.
• Maierhöfer, P.
• Moretti, N.
• Pozzorini, S.
• Siegert, F.

Titel

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

Ist Teil von

• The European physical journal. C, Particles and fields, 2017-03, Vol.77 (3), p.1-11, Article 145

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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 H T / 2 at fixed order and the M i NLO procedure. Analyzing various cross sections and distributions for t t ¯ + 0 , 1 , 2 , 3  jets at the 13 TeV LHC we find a remarkable overall agreement between fixed-order and M i NLO results. The differences are typically below the respective factor-two scale variations, suggesting that for all considered jet multiplicities missing higher-order effects should not exceed the ten percent level.