2025 Articles
Measurement of ๐ก๐กฬ production in association with additional ๐-jets in the ๐๐ final state in protonโproton collisions at โ๐ = 13 TeV with the ATLAS detector
This paper presents measurements of top-antitop quark pair (๐ก๐กฬ) production in association with additional ๐-jets. The analysis utilises 140 fbโปยน of protonโproton collision data collected with the ATLAS detector at the Large Hadron Collider at a centre-of-mass energy of 13 TeV. Fiducial cross-sections are extracted in a final state featuring one electron and one muon, with at least three or four ๐-jets. Results are presented at the particle level for both integrated cross-sections and normalised differential cross-sections, as functions of global event properties, jet kinematics, and ๐-jet pair properties. Observable quantities characterising ๐-jets originating from the top quark decay and additional ๐-jets are also measured at the particle level, after correcting for detector effects.
The measured integrated fiducial cross-sections are consistent with ๐ก๐กฬ๐๐ฬ predictions from various next-to-leading-order matrix element calculations matched to a parton shower within the uncertainties of the predictions. State-of-the-art theoretical predictions are compared with the differential measurements; none of them simultaneously describes all observables. Differences between any two predictions are smaller than the measurement uncertainties for most observables.
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Also Published In
- Title
- Journal of High Energy Physics
- DOI
- https://doi.org/10.1007/JHEP01(2025)068
More About This Work
- Academic Units
- Physics
- Published Here
- January 22, 2025
Notes
Hadron-Hadron Scattering, Top Physics
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