{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.135833.v3","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/2639010"}},{"@id":"https://doi.org/10.1016/j.physletb.2023.138076","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"CMS Collaboration"},"creator":{"@type":"Organization","name":"CMS Collaboration"},"datePublished":"2023","description":"The production of four top quarks ($\\mathrm{t\\bar{t}t\\bar{t}}$) is studied with LHC proton-proton collision data samples collected by the CMS experiment at a center-of-mass energy of 13 TeV, and corresponding to integrated luminosities of up to 138 fb$^{-1}$. Events that have no leptons (all-hadronic), one lepton, or two opposite-sign leptons (where lepton refers only to prompt electrons or prompt muons) are considered. This is the first $\\mathrm{t\\bar{t}t\\bar{t}}$ measurement that includes the all-hadronic final state. The observed significance of the $\\mathrm{t\\bar{t}t\\bar{t}}$ signal in these final states of 3.9 standard deviations (1.5 expected) provides evidence for $\\mathrm{t\\bar{t}t\\bar{t}}$ production, with a measured cross section of 36 $^{+12}_{-11}$ fb. Combined with earlier CMS results in other final states, the signal significance is 4.0 standard deviations (3.2 expected). The combination returns an observed cross section of 17 $\\pm$ 4 (stat) $\\pm$ 3 (syst) fb, which is consistent with the standard model prediction.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.135833.v3/t1","@type":"Dataset","description":"The jet multiplicity for $N_\\textrm{b} \\geq 4$ in the opposite-sign dilepton channel for the combined 2017--2018 dataset with dilepton decay...","name":"Figure 2"},{"@id":"https://doi.org/10.17182/hepdata.135833.v3/t2","@type":"Dataset","description":"The distribution of the BDT discriminants for the 2016--2018 data set for three different categories in the combined single-electron and...","name":"Figure 3"},{"@id":"https://doi.org/10.17182/hepdata.135833.v3/t3","@type":"Dataset","description":"The distribution of the BDT discriminants for the full 2016--2018 data set in the all-hadronic channel. The sample VR category...","name":"Figure 4a"},{"@id":"https://doi.org/10.17182/hepdata.135833.v3/t4","@type":"Dataset","description":"The distribution of the BDT discriminants for the full 2016--2018 data set in the all-hadronic channel. The sample VR category...","name":"Figure 4b"},{"@id":"https://doi.org/10.17182/hepdata.135833.v3/t5","@type":"Dataset","description":"The distribution of the BDT discriminants for the full 2016--2018 data set in the all-hadronic channel. The SR category shown...","name":"Figure 6a"},{"@id":"https://doi.org/10.17182/hepdata.135833.v3/t6","@type":"Dataset","description":"The distribution of the BDT discriminants for the full 2016--2018 data set in the all-hadronic channel. The SR category shown...","name":"Figure 6b"},{"@id":"https://doi.org/10.17182/hepdata.135833.v3/t7","@type":"Dataset","description":"Expected and observed significance (in standard deviations) for $\\textrm{t}\\bar{\\textrm{t}}\\textrm{t}\\bar{\\textrm{t}}$ production from each final state and the combination with previous CMS...","name":"Figure 7"},{"@id":"https://doi.org/10.17182/hepdata.135833.v3/t8","@type":"Dataset","description":"Measured signal strength ($\\mu = \\sigma_{\\textrm{t}\\bar{\\textrm{t}}\\textrm{t}\\bar{\\textrm{t}}}/ \\sigma_{\\textrm{t}\\bar{\\textrm{t}}\\textrm{t}\\bar{\\textrm{t}}} ^{\\textrm{SM}}$), corresponding cross section (in fb), and the expected and observed significance (in...","name":"Table 2"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins2639010?version=3"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/135833"}],"inLanguage":"en","name":"Evidence for four-top quark production in proton-proton collisions at $\\sqrt{s}$ = 13 TeV","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins2639010?version=3","version":3}