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Measurement of ๐‘ก๐‘กฬ„ production in association with additional ๐‘-jets in the ๐‘’๐œ‡ final state in protonโ€“proton collisions at โˆš๐‘  = 13 TeV with the ATLAS detector

Aad, G.; Aakvaag, E.; Abbott, B.; Abdelhameed, S.; Abeling, K.; Abicht, N. J.; Abidi, S. H.; Aboelela, M.; Aboulhorma, A.; Abramowicz, H.; Abreu, H.; Abulaiti, Y.; Acharya, B. S.; Ackermann, A.; Adam Bourdarios, C.; Adamczyk, L.; Addepalli, S. V.; Addison, M. J.; Adelman, J.; Adiguzel, A.; Adye, T.; Affolder, A. A.; Afik, Y.; Agaras, M. N.; Agarwala, J.; Aggarwal, A.; Agheorghiesei, C.; Ahmadov, F.; Ahmed, W. S.; Ahuja, S.; Ai, X.; Aielli, G.; Aikot, A.; Ait Tamlihat, M.; Aitbenchikh, B.; Akbiyik, M.; ร…kesson, T. P. A.; Akimov, A. V.; Akiyama, D.; Akolkar, N. N.; Al Khoury, Konie

This paper presents measurements of top-antitop quark pair (๐‘ก๐‘กฬ„) production in association with additional ๐‘-jets. The analysis utilises 140 fbโปยน of protonโ€“proton 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 ๐‘ก๐‘กฬ„๐‘๐‘ฬ„ 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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