{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.143515.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/2689657"}},{"@id":"https://doi.org/10.1016/j.physletb.2023.138376","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ATLAS Collaboration"},"creator":{"@type":"Organization","name":"ATLAS Collaboration"},"datePublished":"2024","description":"The inclusive top-quark-pair production cross section $\\sigma_{t\\bar{t}}$ and its ratio to the $Z$-boson production cross section have been measured in proton--proton collisions at $\\sqrt{s} = 13.6$ TeV, using 29 fb${}^{-1}$ of data collected in 2022 with the ATLAS experiment at the Large Hadron Collider. Using events with an opposite-charge electron-muon pair and $b$-tagged jets, and assuming Standard Model decays, the top-quark-pair production cross section is measured to be $\\sigma_{t\\bar{t}} = 850 \\pm 3\\mathrm{(stat.)}\\pm 18\\mathrm{(syst.)}\\pm 20\\mathrm{(lumi.)}$ pb. The ratio of the $t\\bar{t}$ and the $Z$-boson production cross sections is also measured, where the $Z$-boson contribution is determined for inclusive $e^+e^-$ and $\\mu^+\\mu^-$ events in a fiducial phase space. The relative uncertainty on the ratio is reduced compared to the $t\\bar{t}$ cross section, thanks to the cancellation of several systematic uncertainties. The result for the ratio, $R_{t\\bar{t}/Z} = 1.145 \\pm 0.003\\mathrm{(stat.)}\\pm 0.021\\mathrm{(syst.)}\\pm 0.002\\mathrm{(lumi.)}$ is consistent with the Standard Model prediction using the PDF4LHC21 PDF set.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.143515.v1/t1","@type":"Dataset","description":"The fiducial phase-space definition for the $Z$-boson measurement. Born-level leptons are used.","name":"$Z$-boson phase-space"},{"@id":"https://doi.org/10.17182/hepdata.143515.v1/t2","@type":"Dataset","description":"The measured $t\\bar{t}$ cross section and the ratio of the cross sections of $t\\bar{t}$ and the $Z$-boson. Full phase-space is...","name":"Cross section and ratio results"},{"@id":"https://doi.org/10.17182/hepdata.143515.v1/t3","@type":"Dataset","description":"Table with pre-fit yields in the four regions used in the measurement","name":"Pre-fit yields"},{"@id":"https://doi.org/10.17182/hepdata.143515.v1/t4","@type":"Dataset","description":"Table with post-fit yields in the four regions used in the measurement. The correlations of the nuisance parameters, as obtained...","name":"Post-fit yields"},{"@id":"https://doi.org/10.17182/hepdata.143515.v1/t5","@type":"Dataset","description":"Ratio of the $t\\bar{t}$ to the $Z$-boson cross section compared to the predictions for several sets of parton distribution functions....","name":"Cross section ratio theory comparison"},{"@id":"https://doi.org/10.17182/hepdata.143515.v1/t6","@type":"Dataset","description":"Nuisance parameter ranking plot for the $t\\bar{t}$ signal-strength. Only the 10 most important nuisance parameters are shown. The impact of...","name":"$t\\bar{t}$ cross section nuisance parameter ranking"},{"@id":"https://doi.org/10.17182/hepdata.143515.v1/t7","@type":"Dataset","description":"Nuisance parameter ranking plot for the ratio of the $t\\bar{t}$ and $Z$-boson signal-strengths. Only the 10 most important nuisance parameters...","name":"Cross section ratio nuisance parameter ranking"},{"@id":"https://doi.org/10.17182/hepdata.143515.v1/t8","@type":"Dataset","description":"Nuisance parameter ranking plot for the $Z$-boson signal-strength. Only the 10 most important nuisance parameters are shown. The impact of...","name":"$Z$-boson cross section nuisance parameter ranking"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins2689657?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/143515"}],"inLanguage":"en","name":"Measurement of the $t\\bar{t}$ cross section and its ratio to the $Z$ production cross section using $pp$ collisions at $\\sqrt{s} = 13.6$ TeV with the ATLAS detector","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins2689657?version=1","version":1}