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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.