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Study of top-quark pair modelling and uncertainties using ATLAS measurements at $\sqrt{s}$=13 TeV
The modelling of top-quark pair production by the ATLAS collaboration utilises recent Monte Carlo generators with next-to-leading order precision in QCD and matched to a parton shower. Various next-to-leading order and multileg generators and their settings are explored and their predictions are com...
Autor principal: | |
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Lenguaje: | eng |
Publicado: |
2020
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Materias: | |
Acceso en línea: | http://cds.cern.ch/record/2730443 |
Sumario: | The modelling of top-quark pair production by the ATLAS collaboration utilises recent Monte Carlo generators with next-to-leading order precision in QCD and matched to a parton shower. Various next-to-leading order and multileg generators and their settings are explored and their predictions are compared to recent ATLAS measurements in three different top-quark pair decay channels using an integrated luminosity of 36.1~\ifb of $\sqrt{s}=13$ TeV $pp$ collision data. The use of alternative generators and settings for the top-quark modelling uncertainty are explored, with particular focus on uncertainties related to the matching scale and algorithms, the parton shower, and the initial-state radiation. |
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