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Measurements of top-quark pair single- and double-differential cross-sections in the all-hadronic channel in pp collisions at s√ = 13 TeV using the ATLAS detector

Aaboud, M; Aad, G; Abbott, B; Abdinov, O; Abeloos, B; Abhayasinghe, DK; Abidi, SH; ... Zwalinski, L; + view all (2021) Measurements of top-quark pair single- and double-differential cross-sections in the all-hadronic channel in pp collisions at s√ = 13 TeV using the ATLAS detector. Journal of High Energy Physics , 2021 , Article 33. 10.1007/JHEP01(2021)033. Green open access

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Abstract

Differential cross-sections are measured for top-quark pair production in the all-hadronic decay mode, using proton-proton collision events collected by the ATLAS experiment in which all six decay jets are separately resolved. Absolute and normalised single- and double-differential cross-sections are measured at particle and parton level as a function of various kinematic variables. Emphasis is placed on well-measured observables in fully reconstructed final states, as well as on the study of correlations between the top-quark pair system and additional jet radiation identified in the event. The study is performed using data from proton-proton collisions at s√ = 13 TeV collected by the ATLAS detector at CERN’s Large Hadron Collider in 2015 and 2016, corresponding to an integrated luminosity of 36.1 fb−1. The rapidities of the individual top quarks and of the top-quark pair are well modelled by several independent event generators. Significant mismodelling is observed in the transverse momenta of the leading three jet emissions, while the leading top-quark transverse momentum and top-quark pair transverse momentum are both found to be incompatible with several theoretical predictions.

Type: Article
Title: Measurements of top-quark pair single- and double-differential cross-sections in the all-hadronic channel in pp collisions at s√ = 13 TeV using the ATLAS detector
Open access status: An open access version is available from UCL Discovery
DOI: 10.1007/JHEP01(2021)033
Publisher version: https://doi.org/10.1007/JHEP01(2021)033
Language: English
Additional information: This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0) (http://creativecommons.org/licenses/by/4.0/), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
Keywords: Hadron-Hadron scattering (experiments), Top physics
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/10120131
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