{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.144335.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/2719822"}},{"@id":"https://doi.org/10.1007/JHEP02(2024)197","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ATLAS Collaboration"},"creator":{"@type":"Organization","name":"ATLAS Collaboration"},"datePublished":"2023","description":"A search for a heavy CP-odd Higgs boson, $A$, decaying into a $Z$ boson and a heavy CP-even Higgs boson, $H$, is presented using the full LHC Run 2 dataset of $pp$ collisions at $\\sqrt{s}=13$ TeV collected with the ATLAS detector, corresponding to an integrated luminosity of $140$ fb$^{-1}$. The search for $A\\to ZH$ is performed in the $\\ell^+\\ell^- t\\bar{t}$ and $\\nu\\bar{\\nu}b\\bar{b}$ final states and extends the reach of previous searches into different final states in the region with $m_H>350$ GeV and $m_A>800$ GeV. No significant deviation from the Standard Model expectation is found. Upper limits on the production cross-section times the decay branching ratios are set. Limits with a reduced model dependence are also presented as functions of the reconstructed $m(t\\bar{t})$ and $m(b\\bar{b})$ distributions in the $\\ell^+\\ell^- t\\bar{t}$ and $\\nu\\bar{\\nu}b\\bar{b}$ channel, respectively. 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