Associated top quark pair production with a heavy boson: differential cross sections at NLO + NNLL accuracy

Autor: Anna Kulesza, Leszek Motyka, Daniel Schwartländer, Tomasz Stebel, Vincent Theeuwes
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: European Physical Journal C: Particles and Fields, Vol 80, Iss 5, Pp 1-18 (2020)
Druh dokumentu: article
ISSN: 1434-6044
1434-6052
DOI: 10.1140/epjc/s10052-020-7987-6
Popis: Abstract We present theoretical predictions for selected differential cross sections for the process $$pp \rightarrow t {\bar{t}}B$$ pp→tt¯B at the LHC, where B can be a Higgs (H), a Z or a W boson. The predictions are calculated in the direct QCD framework up to the next-to-next-leading logarithmi accuracy and matched to the complete NLO results including QCD and electroweak effects. Additionally, results for the total cross sections are provided. The calculations deliver a significant improvement of the theoretical predictions, especially for the $$ t {\bar{t}}H$$ tt¯H and the $$ t {\bar{t}}Z$$ tt¯Z production. In these cases, predictions for both the total and differential cross sections are remarkably stable with respect to the central scale choice and carry a substantially reduced scale uncertainty in comparison with the complete NLO predictions.
Databáze: Directory of Open Access Journals
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