{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.110250.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/2088291"}},{"@id":"https://doi.org/10.1007/JHEP07(2023)213","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":[{"@type":"Organization","name":"ATLAS Collaboration"},{"@type":"Organization","name":"CMS Collaboration"}],"creator":[{"@type":"Organization","name":"ATLAS Collaboration"},{"@type":"Organization","name":"CMS Collaboration"}],"datePublished":"2024","description":"A combination of measurements of the inclusive top-quark pair production cross-section performed by ATLAS and CMS  in proton--proton collisions at centre-of-mass energies of 7 and 8 TeV at the LHC is presented. The cross-sections are obtained using top-quark pair decays with an opposite-charge electron-muon pair in the final state and with data corresponding to an integrated luminosity of about 5 inverse fb at 7 TeV and about 20 inverse fb at 8 TeV for each experiment. The combined cross-sections are determined to be 178.5 +- 4.7 pb at 7 TeV and 243 +6.0 -5.9 pb at 8 TeV with a correlation of 0.41 for a reference top-quark mass value of 172.5 GeV. The ratio of the combined cross-sections is determined as R_8/7  = 1.363 +- 0.032. The combined measured cross-sections and their ratio agree well with theory calculations using several parton distribution function (PDF) sets. The values of the top-quark pole mass (with the strong-coupling constant fixed at 0.118) and the strong-coupling constant (with the top-quark pole mass fixed at 172.5 GeV) are extracted from the combined results by fitting a next-to-next-to leading order plus next-to-next-to leading log QCD prediction to the measurements, using the NNPDF31_nnlo_ascorr_notop PDF set, yielding mtpole = 173.4 + 1.8 - 2.0 GeV and alpha_s = 0.1170 +- 0.0021 respectively","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.110250.v1/t1","@type":"Dataset","description":"Full covariance matrix including all systematic uncertainties expressed as nuisance parameters. With the exception of the cross section parameters, all...","name":"CMS covariance matrix"},{"@id":"https://doi.org/10.17182/hepdata.110250.v1/t2","@type":"Dataset","description":"Full covariance matrix including all systematic uncertainties expressed as nuisance parameters. With the exception of the cross section parameters, all...","name":"Combination covariance matrix"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins2088291?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/110250"}],"inLanguage":"en","name":"Combination of inclusive top-quark pair production cross-section measurements using ATLAS and CMS data at $\\sqrt{s}= 7$ and 8 TeV","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins2088291?version=1","version":1}