Please use this identifier to cite or link to this item:
|Scopus||Web of Science®||Altmetric|
|Title:||Measurement of the t t¯ t t¯ production cross section in pp collisions at √s = 13 TeV with the ATLAS detector|
|Other Titles:||Measurement of the t t -bar t t -bar production cross section in pp collisions at root s = 13 TeV with the ATLAS detector|
Abed Abud, A.
Abusleme Hoffman, A.C.
Adam Bourdarios, C.
|Citation:||The Journal of High Energy Physics, 2021; 2021(11):118-1-118-53|
|The Atlas Collaboration ... Paul D. Jackson ... Albert X. Kong ... Harish Potti ... Tristan A. Ruggeri ... Martin White ... et al.|
|Abstract:||A measurement of four-top-quark production using proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the Large Hadron Collider corresponding to an integrated luminosity of 139 fb−1 is presented. Events are selected if they contain a single lepton (electron or muon) or an opposite-sign lepton pair, in association with multiple jets. The events are categorised according to the number of jets and how likely these are to contain b-hadrons. A multivariate technique is then used to discriminate between signal and background events. The measured four-top-quark production cross section is found to be 26+17 −15 fb, with a corresponding observed (expected) significance of 1.9 (1.0) standard deviations over the background-only hypothesis. The result is combined with the previous measurement performed by the ATLAS Collaboration in the multilepton final state. The combined four-top-quark production cross section is measured to be 24+7 −6 fb, with a corresponding observed (expected) signal significance of 4.7 (2.6) standard deviations over the background-only predictions. It is consistent within 2.0 standard deviations with the Standard Model expectation of 12.0 ± 2.4 fb.|
|Keywords:||Hadron-Hadron scattering (experiments); Top physics|
|Rights:||© 2021, The Author(s) This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.|
|Appears in Collections:||Physics publications|
Files in This Item:
|hdl_133705.pdf||Published version||2.28 MB||Adobe PDF||View/Open|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.