{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.93906.v2","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/1793461"}},{"@id":"https://doi.org/10.1140/epjc/s10052-020-8102-8","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ATLAS Collaboration"},"creator":{"@type":"Organization","name":"ATLAS Collaboration"},"datePublished":"2021","description":"A search for direct pair production of scalar partners of the top quark (top squarks or scalar third-generation up-type leptoquarks) in the all-hadronic $t\\bar{t}$ plus missing transverse momentum final state is presented. The analysis of 139 fb$^{-1}$ of ${\\sqrt{s}=13}$ TeV proton-proton collision data collected using the ATLAS detector at the LHC yields no significant excess over the Standard Model background expectation. To interpret the results, a supersymmetric model is used where the top squark decays via $\\tilde{t} \\to t^{(*)} \\tilde{\\chi}^0_1$, with $t^{(*)}$ denoting an on-shell (off-shell) top quark and $\\tilde{\\chi}^0_1$ the lightest neutralino. Three specific event selections are optimised for the following scenarios. In the scenario where $m_{\\tilde{t}}> m_t+m_{\\tilde{\\chi}^0_1}$, top squark masses are excluded in the range 400-1250 GeV for $\\tilde{\\chi}^0_1$ masses below $200$ GeV at 95 % confidence level. In the situation where $m_{\\tilde{t}}\\sim m_t+m_{\\tilde{\\chi}^0_1}$, top squark masses in the range 300-630 GeV are excluded, while in the case where $m_{\\tilde{t}}< m_W+m_b+m_{\\tilde{\\chi}^0_1}$ (with $m_{\\tilde{t}}-m_{\\tilde{\\chi}^0_1}\\ge 5$ GeV), considered for the first time in an ATLAS all-hadronic search, top squark masses in the range 300-660 GeV are excluded. Limits are also set for scalar third-generation up-type leptoquarks, excluding leptoquarks with masses below $1240$ GeV when considering only leptoquark decays into a top quark and a neutrino.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.93906.v2/t1","@type":"Dataset","description":"- - - - - - - - Overview of HEPData Record - - - - - - - -...","name":"Overview"},{"@id":"https://doi.org/10.17182/hepdata.93906.v2/t2","@type":"Dataset","description":"The observed exclusion contour at 95% CL as a function of the $\\it{m}_{\\tilde{\\chi}^{0}_{1}}$ vs. $\\it{m}_{\\tilde{t}}$. Masses that are within the...","name":"stop_obs"},{"@id":"https://doi.org/10.17182/hepdata.93906.v2/t3","@type":"Dataset","description":"The expected exclusion contour at 95% CL as a function of the $\\it{m}_{\\tilde{\\chi}^{0}_{1}}$ vs. $\\it{m}_{\\tilde{t}}$. 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