{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.156805.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/2854934"}},{"@id":"https://doi.org/10.1088/1361-6633/adcd9a","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ATLAS Collaboration"},"creator":{"@type":"Organization","name":"ATLAS Collaboration"},"datePublished":"2025","description":"A measurement of off-shell Higgs boson production in the $H^*\\to ZZ\\to 4\\ell$ decay channel is presented. The measurement uses 140 fb$^{-1}$ of proton-proton collisions at $\\sqrt{s}=13$ TeV collected by the ATLAS detector at the Large Hadron Collider and supersedes the previous result in this decay channel using the same dataset. The data analysis is performed using a neural simulation-based inference method, which builds per-event likelihood ratios using neural networks. The observed (expected) off-shell Higgs boson production signal strength in the $ZZ\\to 4\\ell$ decay channel at 68% CL is $0.87^{+0.75}_{-0.54}$ ($1.00^{+1.04}_{-0.95}$). The evidence for off-shell Higgs boson production using the $ZZ\\to 4\\ell$ decay channel has an observed (expected) significance of $2.5\\sigma$ ($1.3\\sigma$). The expected result represents a significant improvement relative to that of the previous analysis of the same dataset, which obtained an expected significance of $0.5\\sigma$. When combined with the most recent ATLAS measurement in the $ZZ\\to 2\\ell 2\\nu$ decay channel, the evidence for off-shell Higgs boson production has an observed (expected) significance of $3.7\\sigma$ ($2.4\\sigma$). The off-shell measurements are combined with the measurement of on-shell Higgs boson production to obtain constraints on the Higgs boson total width. The observed (expected) value of the Higgs boson width at 68% CL is $4.3^{+2.7}_{-1.9}$ ($4.1^{+3.5}_{-3.4}$) MeV.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.156805.v1/t1","@type":"Dataset","description":"Values of the test statistic $t_{\\mu_{\\mathrm{off-shell}}}$ assuming a single parameter of interest $\\mu_{\\mathrm{off-shell}}$ obtained with an Asimov dataset and with...","name":"$\\mu_{\\mathrm{off-shell}}$ NSBI vs histogram-based, 4l only"},{"@id":"https://doi.org/10.17182/hepdata.156805.v1/t2","@type":"Dataset","description":"Values of the test statistic $t_{\\mu_{\\mathrm{off-shell}}}$ assuming a single parameter of interest $\\mu_{\\mathrm{off-shell}}$ obtained with an Asimov dataset and with...","name":"$\\mu_{\\mathrm{off-shell}}$ NSBI stat+syst vs stat-only, 4l only"},{"@id":"https://doi.org/10.17182/hepdata.156805.v1/t3","@type":"Dataset","description":"Values of the test statistic $t_{\\mu_{\\mathrm{off-shell}}}$ assuming a single parameter of interest $\\mu_{\\mathrm{off-shell}}$ obtained with an Asimov dataset and with...","name":"$\\mu_{\\mathrm{off-shell}}$ NSBI stat+syst vs stat-only"},{"@id":"https://doi.org/10.17182/hepdata.156805.v1/t4","@type":"Dataset","description":"Values of the test statistic $t_{\\kappa_{g,\\mathrm{off-shell}}}$ as a function of $\\kappa_{g,\\mathrm{off-shell}}$ while profiling $\\kappa_{V,\\mathrm{off-shell}}$ obtained with an Asimov dataset and...","name":"$\\kappa_{g,\\mathrm{off-shell}}$ NSBI stat+syst vs stat-only"},{"@id":"https://doi.org/10.17182/hepdata.156805.v1/t5","@type":"Dataset","description":"Values of the test statistic $t_{\\kappa_{V,\\mathrm{off-shell}}}$ as a function of $\\kappa_{V,\\mathrm{off-shell}}$ while profiling $\\kappa_{g,\\mathrm{off-shell}}$ obtained with an Asimov dataset and...","name":"$\\kappa_{V,\\mathrm{off-shell}}$ NSBI stat+syst vs stat-only"},{"@id":"https://doi.org/10.17182/hepdata.156805.v1/t6","@type":"Dataset","description":"Values of the test statistic $t_{\\kappa_{H}}$ as a function of $\\kappa_{H}=\\Gamma_H/\\Gamma_H^{\\mathrm{SM}}$ obtained with an Asimov dataset and with data. 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