Measurement of the t t¯ t t¯ production cross section in pp collisions at √s = 13 TeV with the ATLAS detector
Authors
Alunno Camelia, E
Amelung, C
Amrouche, CS
Andrei, V
Publication Date
2021Journal Title
Journal of High Energy Physics
ISSN
1029-8479
Publisher
Springer Science and Business Media LLC
Volume
2021
Issue
11
Language
en
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Aad, G., Abbott, B., Abbott, D., Abed Abud, A., Abeling, K., Abhayasinghe, D., Abidi, S., et al. (2021). Measurement of the t t¯ t t¯ production cross section in pp collisions at √s = 13 TeV with the ATLAS detector. Journal of High Energy Physics, 2021 (11) https://doi.org/10.1007/JHEP11(2021)118
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$\pm$2.4 fb.
Keywords
Regular Article - Experimental Physics, Hadron-Hadron scattering (experiments), Top physics
Identifiers
jhep11(2021)118, 17160
External DOI: https://doi.org/10.1007/JHEP11(2021)118
This record's URL: https://www.repository.cam.ac.uk/handle/1810/334421
Rights
Licence:
http://creativecommons.org/licenses/by/4.0/
Statistics
Total file downloads (since January 2020). For more information on metrics see the
IRUS guide.