{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.77008.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/1516191"}},{"@id":"https://doi.org/10.1140/epjc/s10052-017-4984-5","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"CMS Collaboration"},"creator":{"@type":"Organization","name":"CMS Collaboration"},"datePublished":"2018","description":"Normalized double-differential cross sections for top quark pair (t t-bar) production are measured in pp collisions at a centre-of-mass energy of 8 TeV with the CMS experiment at the LHC. The analyzed data correspond to an integrated luminosity of 19.7 inverse femtobarns. The measurement is performed in the dilepton e+/- mu-/+ final state. The t t-bar cross section is determined as a function of various pairs of observables characterizing the kinematics of the top quark and t t-bar system. The data are compared to calculations using perturbative quantum chromodynamics at next-to-leading and approximate next-to-next-to-leading orders. They are also compared to predictions of Monte Carlo event generators that complement fixed-order computations with parton showers, hadronization, and multiple-parton interactions. Overall agreement is observed with the predictions, which is improved when the latest global sets of proton parton distribution functions are used. The inclusion of the measured t t-bar cross sections in a fit of parametrized parton distribution functions is shown to have significant impact on the gluon distribution.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.77008.v1/t1","@type":"Dataset","description":"The measured normalized $t\\bar{t}$ double-differential cross sections in different bins of $y(t)$ and $p_{T}(t)$, along with their relative statistical and...","name":"Table 5"},{"@id":"https://doi.org/10.17182/hepdata.77008.v1/t2","@type":"Dataset","description":"The correlation matrix of statistical uncertainties for the normalized $t\\bar{t}$ double-differential cross sections as a function of $y(t)$ and $p_{T}(t)$....","name":"Table 6"},{"@id":"https://doi.org/10.17182/hepdata.77008.v1/t3","@type":"Dataset","description":"Sources and values of the relative systematic uncertainties in percent of the measured normalized $t\\bar{t}$ double-differential cross sections as a...","name":"Table 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