{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.150023.v2","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/2854935"}},{"@id":"https://doi.org/10.1016/j.physletb.2025.139568","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"CMS Collaboration"},"creator":{"@type":"Organization","name":"CMS Collaboration"},"datePublished":"2025","description":"A direct search for new heavy neutral Higgs bosons A and H in the $\\mathrm{t\\bar{t}}$Z channel is presented, targeting the process pp $\\to$ A $\\to$ ZH with H $\\to$$\\mathrm{t\\bar{t}}$. For the first time, the channel with decays of the Z boson to muons or electrons in association with all-hadronic decays of the $\\mathrm{t\\bar{t}}$ system is targeted. The analysis uses proton-proton collision data collected at the CERN LHC with the CMS experiment at $\\sqrt{s}$ = 13 TeV, which correspond to an integrated luminosity of 138 fb$^{-1}$. No signal is observed. Upper limits on the product of the cross section and branching fractions are derived for narrow resonances A and H with masses up to 2100 and 2000 GeV, respectively, assuming A boson production through gluon fusion. The results are also interpreted within two-Higgs-doublet models, where A and H are CP-odd and CP-even states, respectively, complementing and substantially extending the reach of previous searches.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.150023.v2/t1","@type":"Dataset","description":"Distributions of p_T(Z) \u00d7 \u2206m in the SR after the fit to data with a (mA , mH) signal hypothesis...","name":"Figure 4 SR Distributions MA1000 MH350"},{"@id":"https://doi.org/10.17182/hepdata.150023.v2/t2","@type":"Dataset","description":"Distributions of p_T(Z) \u00d7 \u2206m in the SR after the fit to data with a (mA , mH) signal hypothesis...","name":"Figure 4 SR Distributions MA1000 MH850"},{"@id":"https://doi.org/10.17182/hepdata.150023.v2/t3","@type":"Dataset","description":"Expected 95% CL upper limits on the production cross section times branching ratio of the A \u2192 ZH \u2192 Ztt...","name":"Figure 5 (Expected Limits)"},{"@id":"https://doi.org/10.17182/hepdata.150023.v2/t4","@type":"Dataset","description":"Observed 95% CL upper limits on the production cross section times branching ratio of the A \u2192 ZH \u2192 Ztt...","name":"Figure 5 (Observed Limits)"},{"@id":"https://doi.org/10.17182/hepdata.150023.v2/t5","@type":"Dataset","description":"Observed local significance of the production cross section times branching ratio of the A \u2192 ZH \u2192 Ztt process in...","name":"Figure 10 Supplementary material (Observed significance)"},{"@id":"https://doi.org/10.17182/hepdata.150023.v2/t6","@type":"Dataset","description":"Median expected (dashed lines) and observed (filled contours) 95% CL exclusion regions in the (mH, mA) parameter space of the...","name":"Figure 6 Observed tanb=0.5"},{"@id":"https://doi.org/10.17182/hepdata.150023.v2/t7","@type":"Dataset","description":"Median expected (dashed lines) and observed (filled contours) 95% CL exclusion regions in the (mH, mA) parameter space of the...","name":"Figure 6 Observed tanb=1.0"},{"@id":"https://doi.org/10.17182/hepdata.150023.v2/t8","@type":"Dataset","description":"Median expected (dashed lines) and observed (filled contours) 95% CL exclusion regions in the (mH, mA) parameter space of the...","name":"Figure 6 Observed tanb=1.5"},{"@id":"https://doi.org/10.17182/hepdata.150023.v2/t9","@type":"Dataset","description":"Median expected (dashed lines) and observed (filled contours) 95% CL exclusion regions in the (mH, mA) parameter space of the...","name":"Figure 6 Expected tanb=0.5"},{"@id":"https://doi.org/10.17182/hepdata.150023.v2/t10","@type":"Dataset","description":"Median expected (dashed lines) and observed (filled contours) 95% CL exclusion regions in the (mH, mA) parameter space of the...","name":"Figure 6 Expected tanb=1.0"},{"@id":"https://doi.org/10.17182/hepdata.150023.v2/t11","@type":"Dataset","description":"Median expected (dashed lines) and observed (filled contours) 95% CL exclusion regions in the (mH, mA) parameter space of the...","name":"Figure 6 Expected tanb=1.5"},{"@id":"https://doi.org/10.17182/hepdata.150023.v2/t12","@type":"Dataset","description":"Median expected (dashed lines) and observed (filled contours) 95% CL exclusion regions in the type-II 2HDM (tan \u03b2, mA) parameter...","name":"Figure 7 (left) Expected"},{"@id":"https://doi.org/10.17182/hepdata.150023.v2/t13","@type":"Dataset","description":"Median expected (dashed lines) and observed (filled contours) 95% CL exclusion regions in the type-II 2HDM (tan \u03b2, mA) parameter...","name":"Figure 7 (left) Observed"},{"@id":"https://doi.org/10.17182/hepdata.150023.v2/t14","@type":"Dataset","description":"Median expected (dashed lines) and observed (filled contours) 95% CL exclusion regions in the type-II 2HDM (tan\u03b2, cos(\u03b2\u2212\u03b1)) parameter space...","name":"Figure 7 (right) Expected"},{"@id":"https://doi.org/10.17182/hepdata.150023.v2/t15","@type":"Dataset","description":"Median expected (dashed lines) and observed (filled contours) 95% CL exclusion regions in the type-II 2HDM (tan\u03b2, cos(\u03b2\u2212\u03b1)) parameter space...","name":"Figure 7 (right) Observed"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins2854935?version=2"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/150023"}],"inLanguage":"en","name":"Search for heavy neutral Higgs bosons A and H in the $\\mathrm{t\\bar{t}}$Z channel in proton-proton collisions at 13 TeV","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins2854935?version=2","version":2}