Measurements of inclusive and differential fiducial cross-sections of <i>t</i>(<i>t</i>)over-bar production with additional heavy-flavour jets in proton-proton collisions at √<i>s</i>=13 TeV with the ATLAS detector



Aaboud, M, Aad, G, Abbott, B, Abdinov, O, Abeloos, B, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2919 more authors) (2019) Measurements of inclusive and differential fiducial cross-sections of <i>t</i>(<i>t</i>)over-bar production with additional heavy-flavour jets in proton-proton collisions at √<i>s</i>=13 TeV with the ATLAS detector. JOURNAL OF HIGH ENERGY PHYSICS, 04 (4). 046-.

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Abstract

This paper presents measurements of $t\bar{t}$ production in association with additional $b$-jets in $pp$ collisions at the LHC at a centre-of-mass energy of 13 TeV. The data were recorded with the ATLAS detector and correspond to an integrated luminosity of 36.1 fb$^{-1}$. Fiducial cross-section measurements are performed in the dilepton and lepton-plus-jets $t\bar{t}$ decay channels. Results are presented at particle level in the form of inclusive cross-sections of $t\bar{t}$ final states with three and four $b$-jets as well as differential cross-sections as a function of global event properties and properties of $b$-jet pairs. The measured inclusive fiducial cross-sections generally exceed the $t\bar{t}b\bar{b}$ predictions from various next-to-leading-order matrix element calculations matched to a parton shower but are compatible within the total uncertainties. The experimental uncertainties are smaller than the uncertainties in the predictions. Comparisons of state-of-the-art theoretical predictions with the differential measurements are shown and good agreement with data is found for most of them.

Item Type: Article
Additional Information: 62 pages in total, author list starting page 46, 17 figures, 11 tables, submitted to JHEP. All figures, including auxiliary figures, are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2017-12
Uncontrolled Keywords: Hadron-Hadron scattering (experiments), Heavy quark production
Depositing User: Symplectic Admin
Date Deposited: 08 May 2019 11:22
Last Modified: 10 Oct 2023 17:26
DOI: 10.1007/JHEP04(2019)046
Open Access URL: https://link.springer.com/article/10.1007/JHEP04(2...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3039499