{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.140801.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/2648095"}},{"@id":"https://doi.org/10.1140/epjc/s10052-023-11573-0","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ATLAS Collaboration"},"creator":{"@type":"Organization","name":"ATLAS Collaboration"},"datePublished":"2024","description":"A measurment is presented for four-top-quark production using an integrated luminosity of 140 fb\\(^{-1}\\) of proton--proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the LHC. Events are selected if they contain a same-sign lepton pair or at least three leptons (electrons or muons). Jet multiplicity, jet flavour and event kinematics are used to separate signal from the background through a multivariate discriminant, and dedicated control regions are used to constrain the dominant backgrounds. The four-top-quark production cross section is measured to be $22.5^{+6.6}_{-5.5}$ fb. This corresponds to an observed (expected) significance with respect to the background-only hypothesis of 6.1 (4.3) standard deviations and provides evidence for this process.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.140801.v1/t1","@type":"Dataset","description":"Post-fit distributions for the number of jets ($N_{j}$) in CR $t\\bar{t}W^{+}$+jets. The QmisID represents the backgrounds with a mis-assigned charge....","name":"Figure 2a: CR ttW+jets (+)"},{"@id":"https://doi.org/10.17182/hepdata.140801.v1/t2","@type":"Dataset","description":"Post-fit distributions for the number of jets ($N_{j}$) in CR $t\\bar{t}W^{-}$+jets. The QmisID represents the backgrounds with a mis-assigned charge....","name":"Figure 2b: CR ttW+jets (-)"},{"@id":"https://doi.org/10.17182/hepdata.140801.v1/t3","@type":"Dataset","description":"Post-fit distributions for the number of jets ($N_{j}$) in CR 1b(+). The QmisID represents the backgrounds with a mis-assigned charge....","name":"Figure 2c: CR 1b(+)"},{"@id":"https://doi.org/10.17182/hepdata.140801.v1/t4","@type":"Dataset","description":"Post-fit distributions for the number of jets ($N_{j}$) in CR 1b(-). The QmisID represents the backgrounds with a mis-assigned charge....","name":"Figure 2d: CR 1b(-)"},{"@id":"https://doi.org/10.17182/hepdata.140801.v1/t5","@type":"Dataset","description":"Post-fit distribution for the difference between the number of positive events and the number of negative events ($N_{+}-N_{-}$) as a...","name":"Figure 3: ttW validation"},{"@id":"https://doi.org/10.17182/hepdata.140801.v1/t6","@type":"Dataset","description":"Post-fit distributions for the fitted variables in the CRs for the fake/non-prompt lepton background - CR HF e. The QmisID...","name":"Figure 4a: CR HF e"},{"@id":"https://doi.org/10.17182/hepdata.140801.v1/t7","@type":"Dataset","description":"Post-fit distributions for the fitted variables in the CRs for the fake/non-prompt lepton background - CR HF $\\mu$. The QmisID...","name":"Figure 4b: CR HF mu"},{"@id":"https://doi.org/10.17182/hepdata.140801.v1/t8","@type":"Dataset","description":"Post-fit distributions for the fitted variables in the CRs for the fake/non-prompt lepton background - CR Mat. Conv.. The QmisID...","name":"Figure 4c: CR Mat. Conv."},{"@id":"https://doi.org/10.17182/hepdata.140801.v1/t9","@type":"Dataset","description":"Post-fit distributions for the fitted variables in the CRs for the fake/non-prompt lepton background - CR Low $m_{\\gamma*}$. The QmisID...","name":"Figure 4d: CR Low m_{gamma*}"},{"@id":"https://doi.org/10.17182/hepdata.140801.v1/t10","@type":"Dataset","description":"Comparison between data and the predictions after a fit to data for the GNN distribution in the SR. The QmisID...","name":"Figure 5: GNN in SR"},{"@id":"https://doi.org/10.17182/hepdata.140801.v1/t11","@type":"Dataset","description":"Comparison between data and prediction after the fit to data in the signal-enriched region with GNN >= 0.6 for the...","name":"Figure 6a: number of jets in GNN >= 0.6"},{"@id":"https://doi.org/10.17182/hepdata.140801.v1/t12","@type":"Dataset","description":"Comparison between data and prediction after the fit to data in the signal-enriched region with GNN >= 0.6 for the...","name":"Figure 6b: number of b-jets in GNN >= 0.6"},{"@id":"https://doi.org/10.17182/hepdata.140801.v1/t13","@type":"Dataset","description":"Comparison between data and prediction after the fit to data in the signal-enriched region with GNN >= 0.6 for the...","name":"Figure 6c: Leading four PCBT scores of jets (GNN >= 0.6)"},{"@id":"https://doi.org/10.17182/hepdata.140801.v1/t14","@type":"Dataset","description":"Comparison between data and prediction after the fit to data in the 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