cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17182/hepdata.144335.v1/t25
title: "m(lltt)-m(tt),L3hi_Zin_Hin500,ggF-production" of "Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a $Z$ boson in the $\ell^+\ell^- t\bar{t}$ and $\nu\bar{\nu}b\bar{b}$ final states using 140 fb$^{-1}$ of data collected with the ATLAS detector"

description: The distribution of the fit discriminant m(lltt)-m(tt) in the signal region of the lltt channel for the mH=500 GeV hypothesis. <br><br>return to overview
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 $m_H&gt;350$ GeV and $m_A&gt;800$ 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. In addition, an interpretation of the results in the context of two-Higgs-doublet models is given.
DOI: 10.17182/hepdata.144335.v1/t26
title: "m(lltt)-m(tt),L3hi_Zin_Hin550,ggF-production" of "Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a $Z$ boson in the $\ell^+\ell^- t\bar{t}$ and $\nu\bar{\nu}b\bar{b}$ final states using 140 fb$^{-1}$ of data collected with the ATLAS detector"

description: The distribution of the fit discriminant m(lltt)-m(tt) in the signal region of the lltt channel for the mH=550 GeV hypothesis. <br><br>return to overview
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 $m_H&gt;350$ GeV and $m_A&gt;800$ 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. In addition, an interpretation of the results in the context of two-Higgs-doublet models is given.
DOI: 10.17182/hepdata.144335.v1/t27
title: "m(lltt)-m(tt),L3hi_Zin_Hin600,ggF-production" of "Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a $Z$ boson in the $\ell^+\ell^- t\bar{t}$ and $\nu\bar{\nu}b\bar{b}$ final states using 140 fb$^{-1}$ of data collected with the ATLAS detector"

description: The distribution of the fit discriminant m(lltt)-m(tt) in the signal region of the lltt channel for the mH=600 GeV hypothesis. <br><br>return to overview
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 $m_H&gt;350$ GeV and $m_A&gt;800$ 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. In addition, an interpretation of the results in the context of two-Higgs-doublet models is given.
DOI: 10.17182/hepdata.144335.v1/t28
title: "m(lltt)-m(tt),L3hi_Zin_Hin700,ggF-production" of "Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a $Z$ boson in the $\ell^+\ell^- t\bar{t}$ and $\nu\bar{\nu}b\bar{b}$ final states using 140 fb$^{-1}$ of data collected with the ATLAS detector"

description: The distribution of the fit discriminant m(lltt)-m(tt) in the signal region of the lltt channel for the mH=700 GeV hypothesis. <br><br>return to overview
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 $m_H&gt;350$ GeV and $m_A&gt;800$ 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. In addition, an interpretation of the results in the context of two-Higgs-doublet models is given.
DOI: 10.17182/hepdata.144335.v1/t29
title: "m(lltt)-m(tt),L3hi_Zin_Hin800,ggF-production" of "Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a $Z$ boson in the $\ell^+\ell^- t\bar{t}$ and $\nu\bar{\nu}b\bar{b}$ final states using 140 fb$^{-1}$ of data collected with the ATLAS detector"

description: The distribution of the fit discriminant m(lltt)-m(tt) in the signal region of the lltt channel for the mH=800 GeV hypothesis. <br><br>return to overview
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 $m_H&gt;350$ GeV and $m_A&gt;800$ 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. In addition, an interpretation of the results in the context of two-Higgs-doublet models is given.
DOI: 10.17182/hepdata.144335.v1/t30
title: "mTVH,2tag,0L_Hin130,ggF-production" of "Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a $Z$ boson in the $\ell^+\ell^- t\bar{t}$ and $\nu\bar{\nu}b\bar{b}$ final states using 140 fb$^{-1}$ of data collected with the ATLAS detector"

description: The distribution of the fit discriminant mTVH in the 2 b-tag signal region of the vvbb channel for the mH=130 GeV hypothesis. <br><br>return to overview
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 $m_H&gt;350$ GeV and $m_A&gt;800$ 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. In addition, an interpretation of the results in the context of two-Higgs-doublet models is given.
DOI: 10.17182/hepdata.144335.v1/t31
title: "mTVH,2tag,0L_Hin150,ggF-production" of "Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a $Z$ boson in the $\ell^+\ell^- t\bar{t}$ and $\nu\bar{\nu}b\bar{b}$ final states using 140 fb$^{-1}$ of data collected with the ATLAS detector"

description: The distribution of the fit discriminant mTVH in the 2 b-tag signal region of the vvbb channel for the mH=150 GeV hypothesis. <br><br>return to overview
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 $m_H&gt;350$ GeV and $m_A&gt;800$ 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. In addition, an interpretation of the results in the context of two-Higgs-doublet models is given.
DOI: 10.17182/hepdata.144335.v1/t32
title: "mTVH,2tag,0L_Hin200,ggF-production" of "Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a $Z$ boson in the $\ell^+\ell^- t\bar{t}$ and $\nu\bar{\nu}b\bar{b}$ final states using 140 fb$^{-1}$ of data collected with the ATLAS detector"

description: The distribution of the fit discriminant mTVH in the 2 b-tag signal region of the vvbb channel for the mH=200 GeV hypothesis. <br><br>return to overview
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 $m_H&gt;350$ GeV and $m_A&gt;800$ 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. In addition, an interpretation of the results in the context of two-Higgs-doublet models is given.
DOI: 10.17182/hepdata.144335.v1/t33
title: "mTVH,2tag,0L_Hin250,ggF-production" of "Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a $Z$ boson in the $\ell^+\ell^- t\bar{t}$ and $\nu\bar{\nu}b\bar{b}$ final states using 140 fb$^{-1}$ of data collected with the ATLAS detector"

description: The distribution of the fit discriminant mTVH in the 2 b-tag signal region of the vvbb channel for the mH=250 GeV hypothesis. <br><br>return to overview
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 $m_H&gt;350$ GeV and $m_A&gt;800$ 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. In addition, an interpretation of the results in the context of two-Higgs-doublet models is given.
DOI: 10.17182/hepdata.144335.v1/t34
title: "mTVH,2tag,0L_Hin350,ggF-production" of "Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a $Z$ boson in the $\ell^+\ell^- t\bar{t}$ and $\nu\bar{\nu}b\bar{b}$ final states using 140 fb$^{-1}$ of data collected with the ATLAS detector"

description: The distribution of the fit discriminant mTVH in the 2 b-tag signal region of the vvbb channel for the mH=350 GeV hypothesis. <br><br>return to overview
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 $m_H&gt;350$ GeV and $m_A&gt;800$ 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. In addition, an interpretation of the results in the context of two-Higgs-doublet models is given.
DOI: 10.17182/hepdata.144335.v1/t35
title: "mTVH,2tag,0L_Hin400,ggF-production" of "Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a $Z$ boson in the $\ell^+\ell^- t\bar{t}$ and $\nu\bar{\nu}b\bar{b}$ final states using 140 fb$^{-1}$ of data collected with the ATLAS detector"

description: The distribution of the fit discriminant mTVH in the 2 b-tag signal region of the vvbb channel for the mH=400 GeV hypothesis. <br><br>return to overview
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 $m_H&gt;350$ GeV and $m_A&gt;800$ 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. In addition, an interpretation of the results in the context of two-Higgs-doublet models is given.
DOI: 10.17182/hepdata.144335.v1/t36
title: "mTVH,2tag,0L_Hin450,ggF-production" of "Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a $Z$ boson in the $\ell^+\ell^- t\bar{t}$ and $\nu\bar{\nu}b\bar{b}$ final states using 140 fb$^{-1}$ of data collected with the ATLAS detector"

description: The distribution of the fit discriminant mTVH in the 2 b-tag signal region of the vvbb channel for the mH=450 GeV hypothesis. <br><br>return to overview
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 $m_H&gt;350$ GeV and $m_A&gt;800$ 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. In addition, an interpretation of the results in the context of two-Higgs-doublet models is given.
DOI: 10.17182/hepdata.144335.v1/t37
title: "mTVH,2tag,0L_Hin500,ggF-production" of "Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a $Z$ boson in the $\ell^+\ell^- t\bar{t}$ and $\nu\bar{\nu}b\bar{b}$ final states using 140 fb$^{-1}$ of data collected with the ATLAS detector"

description: The distribution of the fit discriminant mTVH in the 2 b-tag signal region of the vvbb channel for the mH=500 GeV hypothesis. <br><br>return to overview
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 $m_H&gt;350$ GeV and $m_A&gt;800$ 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. In addition, an interpretation of the results in the context of two-Higgs-doublet models is given.
DOI: 10.17182/hepdata.144335.v1/t38
title: "mTVH,2tag,0L_Hin600,ggF-production" of "Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a $Z$ boson in the $\ell^+\ell^- t\bar{t}$ and $\nu\bar{\nu}b\bar{b}$ final states using 140 fb$^{-1}$ of data collected with the ATLAS detector"

description: The distribution of the fit discriminant mTVH in the 2 b-tag signal region of the vvbb channel for the mH=600 GeV hypothesis. <br><br>return to overview
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 $m_H&gt;350$ GeV and $m_A&gt;800$ 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. In addition, an interpretation of the results in the context of two-Higgs-doublet models is given.
DOI: 10.17182/hepdata.144335.v1/t39
title: "mTVH,2tag,0L_Hin700,ggF-production" of "Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a $Z$ boson in the $\ell^+\ell^- t\bar{t}$ and $\nu\bar{\nu}b\bar{b}$ final states using 140 fb$^{-1}$ of data collected with the ATLAS detector"

description: The distribution of the fit discriminant mTVH in the 2 b-tag signal region of the vvbb channel for the mH=700 GeV hypothesis. <br><br>return to overview
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 $m_H&gt;350$ GeV and $m_A&gt;800$ 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. In addition, an interpretation of the results in the context of two-Higgs-doublet models is given.
DOI: 10.17182/hepdata.144335.v1/t40
title: "mTVH,2tag,0L_Hin800,ggF-production" of "Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a $Z$ boson in the $\ell^+\ell^- t\bar{t}$ and $\nu\bar{\nu}b\bar{b}$ final states using 140 fb$^{-1}$ of data collected with the ATLAS detector"

description: The distribution of the fit discriminant mTVH in the 2 b-tag signal region of the vvbb channel for the mH=800 GeV hypothesis. <br><br>return to overview
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 $m_H&gt;350$ GeV and $m_A&gt;800$ 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. In addition, an interpretation of the results in the context of two-Higgs-doublet models is given.