{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.129623.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/2180393"}},{"@id":"https://doi.org/10.1140/epjc/s10052-023-11477-z","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ATLAS Collaboration"},"creator":{"@type":"Organization","name":"ATLAS Collaboration"},"datePublished":"2023","description":"This paper presents a statistical combination of searches targeting final states with two top quarks and invisible particles, characterised by the presenceof zero, one or two leptons, at least one jet originating from a $b$-quark and missing transverse momentum.The analyses are searches for phenomena beyond the Standard Model consistent with the direct production of dark matter in $pp$ collisions at the LHC, using 139 fb$^{-\\text{1}}$ of data collected with the ATLAS detector at a centre-of-mass energy of 13 TeV.The results are interpreted in terms of simplified dark matter models with a spin-0 scalar or pseudoscalar mediator particle. In addition,the results are interpreted in terms of upper limits on the Higgs boson invisible branching ratio, where the Higgs boson is producedaccording to the Standard Model in association with a pair of top quarks.For scalar (pseudoscalar) dark matter models, with all couplings set to unity, the statistical combination extends the mass range excluded by the best of the individual channels by 100 (30) GeV, excluding mediator masses up to 370 GeV.In addition, the statistical combination improves the expected coupling exclusion reach by 14\\% (24\\%), assuming a scalar (pseudoscalar) mediator mass of 10 GeV.An upper limit on the Higgs boson invisible branching ratio of 0.38 ($\\text{0.30}^{+\\text{0.13}}_{-\\text{0.09}}$) is observed (expected) at 95\\% confidence level.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.129623.v1/t1","@type":"Dataset","description":"Post-fit signal region yields for the tt0L-high and the tt0L-low analyses. The bottom panel shows the statistical significance of the...","name":"Figure 2a"},{"@id":"https://doi.org/10.17182/hepdata.129623.v1/t2","@type":"Dataset","description":"Representative fit distribution in the signal region for the tt1L analysis: each bin of such distribution corresponds to a single...","name":"Figure 2b"},{"@id":"https://doi.org/10.17182/hepdata.129623.v1/t3","@type":"Dataset","description":"Representative fit distribution in the same flavour leptons signal region for the tt2L analysis: each bin of such distribution, starting...","name":"Figure 2c"},{"@id":"https://doi.org/10.17182/hepdata.129623.v1/t4","@type":"Dataset","description":"Summary of the total uncertainty in the background prediction for each SR of the tt0L-low, tt0L-high, tt1L and tt2L analysis...","name":"Figure 4"},{"@id":"https://doi.org/10.17182/hepdata.129623.v1/t5","@type":"Dataset","description":"Exclusion limits for colour-neutral scalar mediator dark matter models as a function of the mediator mass $m(\\phi)$ for a DM...","name":"Figure 5a"},{"@id":"https://doi.org/10.17182/hepdata.129623.v1/t6","@type":"Dataset","description":"Exclusion limits for colour-neutral pseudoscalar mediator dark matter models as a function of the mediator mass $m(a)$ for a DM...","name":"Figure 5b"},{"@id":"https://doi.org/10.17182/hepdata.129623.v1/t7","@type":"Dataset","description":"$E_{\\text{T}}^{\\text{miss}}$ distribution in SR0X for the tt0L-low analysis. 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