{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.114228.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/2027687"}},{"@id":"https://doi.org/10.1140/epjc/s10052-022-10785-0","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ATLAS Collaboration"},"creator":{"@type":"Organization","name":"ATLAS Collaboration"},"datePublished":"2022","description":"A search for the pair production of heavy leptons as predicted by the type-III seesaw mechanism is presented. The search uses proton-proton collision data at a centre-of-mass energy of 13 TeV, corresponding to 139 fb$^{-1}$ of integrated luminosity recorded by the ATLAS detector during Run 2 of the Large Hadron Collider. The analysis focuses on final states with three or four electrons or muons from the possible decays of new heavy leptons via intermediate electroweak bosons. No significant deviations above the Standard Model expectation are observed; upper and lower limits on the heavy lepton production cross-section and masses are derived respectively. These results are then combined for the first time with the ones already published by ATLAS using the channel with two leptons in the final state. The observed lower limit on the mass of the type-III seesaw heavy leptons combining two, three and four lepton channels together is 910 GeV at the 95% confidence level.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t1","@type":"Dataset","description":"Expected background yields and observed data after the background-only fit in the SRs.","name":"Table 1"},{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t2","@type":"Dataset","description":"Distribution of $m_{\\mathrm{T},3l}$ in the ZL SR after the background-only fit. The uncertainty on the expected number of background events...","name":"Table 2"},{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t3","@type":"Dataset","description":"Distribution of $m_{\\mathrm{T},3l}$ in the ZL Veto SR after the background-only fit. The uncertainty on the expected number of background...","name":"Table 3"},{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t4","@type":"Dataset","description":"Distribution of $m_{\\mathrm{T},3l}$ in the JNLow SR after the background-only fit. The uncertainty on the expected number of background events...","name":"Table 4"},{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t5","@type":"Dataset","description":"Distribution of $H_\\text{T} + E_\\text{T}^\\text{miss}$ in the Q0 SR after the background-only fit. The uncertainty on the expected number of...","name":"Table 5"},{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t6","@type":"Dataset","description":"Distribution of $H_\\text{T} + E_\\text{T}^\\text{miss}$ in the Q2 SR after the background-only fit. The uncertainty on the expected number of...","name":"Table 6"},{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t7","@type":"Dataset","description":"Distribution of $m_{\\mathrm{T},3l}$ in the ZL-CR after the background-only fit.","name":"Table 7"},{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t8","@type":"Dataset","description":"Distribution of $m_{\\mathrm{T},3l}$ in the Fake-CR after the background-only fit.","name":"Table 8"},{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t9","@type":"Dataset","description":"Distribution of $H_\\text{T} + E_\\text{T}^\\text{miss}$ in the Q0 DB-CR after the background-only fit.","name":"Table 9"},{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t10","@type":"Dataset","description":"Distribution of $H_\\text{T} + E_\\text{T}^\\text{miss}$ in the Q0 RT-CR after the background-only fit.","name":"Table 10"},{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t11","@type":"Dataset","description":"Expected and observed exclusion limit for the combination of the two- (from Ref. EXOT-2018-33), three- and four-lepton channels, for the...","name":"Table 11"},{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t12","@type":"Dataset","description":"Expected and observed 95% ( $CL_s$ ) exclusion limits in the three lepton channel for the type-III seesaw process with...","name":"Table 12"},{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t13","@type":"Dataset","description":"Expected and observed 95% ( $CL_s$ ) exclusion limits in the four lepton channel for the type-III seesaw process with...","name":"Table 13"},{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t14","@type":"Dataset","description":"Cross-sections of signal Monte Carlo samples for each mass point considered in this analysis. Leading order cross-sections ( $\\sigma_{LO}$ )...","name":"Table 14"},{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t15","@type":"Dataset","description":"Expected signal and background yields after each of the analysis selection cuts for the 800 GeV mass hypothesis in the...","name":"Table 15"},{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t16","@type":"Dataset","description":"Expected signal and background yields after each of the analysis selection cuts for the 800 GeV mass hypothesis in the...","name":"Table 16"},{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t17","@type":"Dataset","description":"Expected signal and background yields after each of the analysis selection cuts for the 800 GeV mass hypothesis in the...","name":"Table 17"},{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t18","@type":"Dataset","description":"Expected signal and background yields after each of the analysis selection cuts for the 800 GeV mass hypothesis in the...","name":"Table 18"},{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t19","@type":"Dataset","description":"Expected signal and background yields after each of the analysis selection cuts for the 800 GeV mass hypothesis in the...","name":"Table 19"},{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t20","@type":"Dataset","description":"Expected signal and background yields after each of the analysis selection cuts for the 800 GeV mass hypothesis in the...","name":"Table 20"},{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t21","@type":"Dataset","description":"Expected signal and background yields after each of the analysis selection cuts for the 800 GeV mass hypothesis in the...","name":"Table 21"},{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t22","@type":"Dataset","description":"Expected signal and background yields after each of the analysis selection cuts for the 800 GeV mass hypothesis in the...","name":"Table 22"},{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t23","@type":"Dataset","description":"Expected background yields and observed data after the background-only fit, in the three-lepton CRs and VRs.","name":"Table 23"},{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t24","@type":"Dataset","description":"Expected background yields and observed data after the background-only fit, in the four-lepton CRs and VRs.","name":"Table 24"},{"@id":"https://doi.org/10.17182/hepdata.114228.v1/t25","@type":"Dataset","description":"Expected and observed 95% ( $CL_s$ ) exclusion limits in the three and four lepton channels for the type-III seesaw...","name":"Table 25"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins2027687?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/114228"}],"inLanguage":"en","name":"Search for type-III seesaw heavy leptons in leptonic final states 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/ins2027687?version=1","version":1}