{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.89050.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/1722036"}},{"@id":"https://doi.org/10.1103/PhysRevD.99.092004","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ATLAS Collaboration"},"creator":{"@type":"Organization","name":"ATLAS Collaboration"},"datePublished":"2020","description":"A search for new particles decaying into a pair of top quarks is performed using proton-proton collision data recorded with the ATLAS detector at the Large Hadron Collider at a center-of-mass energy of $\\sqrt{s}$ = 13 TeV corresponding to an integrated luminosity of 36.1 fb$^{-1}$. Events consistent with top-quark pair production and the fully hadronic decay mode of the top quarks are selected by requiring multiple high transverse momentum jets including those containing b-hadrons. Two analysis techniques, exploiting dedicated top-quark pair reconstruction in different kinematic regimes, are used to optimize the search sensitivity to new hypothetical particles over a wide mass range. The invariant mass distribution of the two reconstructed top-quark candidates is examined for resonant production of new particles with various spins and decay widths. No significant deviation from the Standard Model prediction is observed and limits are set on the production cross-section times branching fraction for new hypothetical $Z^{\\prime}$ bosons, dark-matter mediators, Kaluza-Klein gravitons and Kaluza-Klein gluons. By comparing with the predicted production cross-sections, the $Z^{\\prime}$ boson in the topcolor-assisted-technicolor model is excluded for masses up to 3.1\u22123.6 TeV, the dark-matter mediators in a simplified framework are excluded in the mass ranges from 0.8 TeV to 0.9 TeV and from 2.0 TeV to 2.2 TeV, and the Kaluza-Klein gluon is excluded for masses up to 3.4 TeV, depending on the decay widths of the particles.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t1","@type":"Dataset","description":"Acceptance times selection efficiency for topcolor-assisted-technicolor Z$^{\\prime}_{TC2}$ as a function of top-quark pair mass for all regions A\u2013D in the...","name":"Table 1"},{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t2","@type":"Dataset","description":"Acceptance times selection efficiency for Kaluza-Klein graviton as a function of top-quark pair mass for all regions A\u2013D in the...","name":"Table 2"},{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t3","@type":"Dataset","description":"Acceptance times selection efficiency for Kaluza-Klein gluon \u0393=30% as a function of top-quark pair mass for all regions A\u2013D in...","name":"Table 3"},{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t4","@type":"Dataset","description":"Observed top-quark mass distribution and expected background in Region A after the fit (Post-Fit) under the background-only hypothesis for the...","name":"Table 4"},{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t5","@type":"Dataset","description":"Observed top-quark mass distribution and expected background in Region B after the fit (Post-Fit) under the background-only hypothesis for the...","name":"Table 5"},{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t6","@type":"Dataset","description":"Observed top-quark mass distribution and expected background in Region C after the fit (Post-Fit) under the background-only hypothesis for the...","name":"Table 6"},{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t7","@type":"Dataset","description":"Observed top-quark mass distribution and expected background in Region D after the fit (Post-Fit) under the background-only hypothesis for the...","name":"Table 7"},{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t8","@type":"Dataset","description":"Observed top-quark mass distribution and expected background in Region SR1 Medium 1b after the fit (Post-Fit) under the background-only hypothesis...","name":"Table 8"},{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t9","@type":"Dataset","description":"Observed top-quark mass distribution and expected background in Region SR1 Medium 2b after the fit (Post-Fit) under the background-only hypothesis...","name":"Table 9"},{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t10","@type":"Dataset","description":"Observed top-quark mass distribution and expected background in Region SR1 Tight 1b after the fit (Post-Fit) under the background-only hypothesis...","name":"Table 10"},{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t11","@type":"Dataset","description":"Observed top-quark mass distribution and expected background in Region SR1 Tight 2b after the fit (Post-Fit) under the background-only hypothesis...","name":"Table 11"},{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t12","@type":"Dataset","description":"Observed top-quark mass distribution and expected background in Region SR2 Medium 1b after the fit (Post-Fit) under the background-only hypothesis...","name":"Table 12"},{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t13","@type":"Dataset","description":"Observed top-quark mass distribution and expected background in Region SR2 Medium 2b after the fit (Post-Fit) under the background-only hypothesis...","name":"Table 13"},{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t14","@type":"Dataset","description":"Observed top-quark mass distribution and expected background in Region SR2 Tight 1b after the fit (Post-Fit) under the background-only hypothesis...","name":"Table 14"},{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t15","@type":"Dataset","description":"Observed top-quark mass distribution and expected background in Region SR2 Tight 2b after the fit (Post-Fit) under the background-only hypothesis...","name":"Table 15"},{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t16","@type":"Dataset","description":"Expected and observed upper limits on the cross-section times branching fraction of topcolor-assisted-technicolor Z$^{\\prime}_{TC2}$ decaying into top-quark pair as a...","name":"Table 16"},{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t17","@type":"Dataset","description":"Expected and observed upper limits on the cross-section times branching fraction of A1 axial-vector mediator decaying into top-quark pair as...","name":"Table 17"},{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t18","@type":"Dataset","description":"Expected and observed upper limits on the cross-section times branching fraction of V1 vector mediator decaying into top-quark pair as...","name":"Table 18"},{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t19","@type":"Dataset","description":"Expected and observed upper limits on the cross-section times branching fraction of Kaluza-Klein graviton decaying into top-quark pair as a...","name":"Table 19"},{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t20","@type":"Dataset","description":"Expected and observed upper limits on the cross-section times branching fraction of Kaluza-Klein gluon decaying into top-quark pair as a...","name":"Table 20"},{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t21","@type":"Dataset","description":"Expected and observed upper limits on cross-section times branching fraction of Kaluza-Klein gluon decaying into top-quark pair as a function...","name":"Table 21"},{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t22","@type":"Dataset","description":"Expected and observed upper limits on cross-section times branching fraction of Kaluza-Klein gluon decaying into top-quark pair as a function...","name":"Table 22"},{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t23","@type":"Dataset","description":"Expected and observed upper limits on cross-section times branching fraction of Kaluza-Klein gluon decaying into top-quark pair as a function...","name":"Table 23"},{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t24","@type":"Dataset","description":"Expected upper limits on cross-section times branching fraction of Kaluza-Klein gluon decaying into top-quark pair as a function of the...","name":"Table 24"},{"@id":"https://doi.org/10.17182/hepdata.89050.v1/t25","@type":"Dataset","description":"Expected upper limits on cross-section times branching fraction of Kaluza-Klein gluon decaying into top-quark pair as a function of the...","name":"Table 25"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins1722036?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/89050"}],"inLanguage":"en","name":"Search for heavy particles decaying into a top-quark pair in the fully hadronic final state in $pp$ collisions at $\\sqrt{s} =13$ TeV with the ATLAS detector","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins1722036?version=1","version":1}