{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.63210.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/1286622"}},{"@id":"https://doi.org/10.1140/epjc/s10052-014-2883-6","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ATLAS Collaboration"},"creator":{"@type":"Organization","name":"ATLAS Collaboration"},"datePublished":"2014","description":"CERN-LHC.  A search is presented for direct top squark pair production using events with at least two leptons including a same-flavour opposite-sign pair with invariant mass consistent with the Z boson mass, jets tagged as originating from b-quarks and missing transverse momentum.  The analysis is performed with proton-proton collision data at sqrt(s) = 8 TeV collected with the ATLAS detector at the LHC in 2012 corresponding to an integrated luminosity of 20.3 fb^-1.  No excess beyond the Standard Model expectation is observed.  Interpretations of the results are provided in models based on the direct pair production of the heavier top squark state (t2) followed by the decay to the lighter top squark state (t1) via t2 --> Z t1, and for t1 pair production in natural gauge-mediated supersymmetry breaking scenarios where the neutralino (chi1^0) is the next-to-lightest supersymmetric particle and decays producing a Z boson and a gravitino (G) via the chi1^0 --> Z G process.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t1","@type":"Dataset","description":"PT(ll) distribution in SR2A for stop GMSB model (data+/-stat, bkg+/-(stat+syst), signal+/-stat), m(stop1)=500 GeV, m(neutralino1)=400 GeV.","name":"Table 1"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t2","@type":"Dataset","description":"njet_3l (data+/-stat, bkg+/-(stat+syst), signal+/-stat).","name":"Table 2"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t3","@type":"Dataset","description":"Missing ET distribution in SR2A for stop GMSB model (data+/-stat, bkg+/-(stat+syst), signal+/-stat), m(stop1)=500 GeV, m(neutralino1)=400 GeV.","name":"Table 3"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t4","@type":"Dataset","description":"Missing ET distribution in SR2B for stop GMSB model (data+/-stat, bkg+/-(stat+syst), signal+/-stat), m(stop1)=500 GeV, m(neutralino1)=400 GeV.","name":"Table 4"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t5","@type":"Dataset","description":"Missing ET distribution in SR2C for stop GMSB model (data+/-stat, bkg+/-(stat+syst), signal+/-stat), m(stop1)=500 GeV, m(neutralino1)=400 GeV.","name":"Table 5"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t6","@type":"Dataset","description":"met_sr3a (data+/-stat, bkg+/-(stat+syst), signal+/-stat).","name":"Table 6"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t7","@type":"Dataset","description":"met_sr3b (data+/-stat, bkg+/-(stat+syst), signal+/-stat).","name":"Table 7"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t8","@type":"Dataset","description":"Expected exclusion limits at 95% CL for stop2 grid.","name":"Table 8"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t9","@type":"Dataset","description":"Expected exclusion limits +1sigma at 95% CL for stop2 grid.","name":"Table 9"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t10","@type":"Dataset","description":"Expected exclusion limits -1sigma at 95% CL for stop2 grid.","name":"Table 10"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t11","@type":"Dataset","description":"Observed exclusion limits at 95% CL for stop2 grid.","name":"Table 11"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t12","@type":"Dataset","description":"Observed exclusion limits +1sigma SUSY cross section uncertainty at 95% CL for stop2 grid.","name":"Table 12"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t13","@type":"Dataset","description":"Observed exclusion limits -1sigma SUSY cross section uncertainty at 95% CL for stop2 grid.","name":"Table 13"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t14","@type":"Dataset","description":"t2_350_n1_20_Observed.","name":"Table 14"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t15","@type":"Dataset","description":"t2_350_n1_20_Expected.","name":"Table 15"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t16","@type":"Dataset","description":"t2_500_n1_20_Observed.","name":"Table 16"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t17","@type":"Dataset","description":"t2_500_n1_20_Expected.","name":"Table 17"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t18","@type":"Dataset","description":"t2_500_n1_120_Observed.","name":"Table 18"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t19","@type":"Dataset","description":"t2_500_n1_120_Expected.","name":"Table 19"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t20","@type":"Dataset","description":"Expected exclusion limits at 95% CL for stop GMSB model.","name":"Table 20"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t21","@type":"Dataset","description":"Expected exclusion limits +1sigma at 95% CL for stop GMSB model.","name":"Table 21"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t22","@type":"Dataset","description":"Expected exclusion limits -1sigma at 95% CL for stop GMSB model.","name":"Table 22"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t23","@type":"Dataset","description":"Observed exclusion limits at 95% CL for stop GMSB model.","name":"Table 23"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t24","@type":"Dataset","description":"Observed exclusion limits +1sigma SUSY cross section uncertainty at 95% CL for stop GMSB model.","name":"Table 24"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t25","@type":"Dataset","description":"Observed exclusion limits -1sigma SUSY cross section uncertainty at 95% CL for stop GMSB model.","name":"Table 25"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t26","@type":"Dataset","description":"met_3l2j (data+/-stat, bkg+/-(stat+syst), signal+/-stat).","name":"Table 26"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t27","@type":"Dataset","description":"met_3l3j (data+/-stat, bkg+/-(stat+syst), signal+/-stat).","name":"Table 27"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t28","@type":"Dataset","description":"The best expected signal region for stop2 model, where 1 and 2 mean SR3A and SR3B.","name":"Table 28"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t29","@type":"Dataset","description":"The best expected signal region for stop GMSB model, where 1 and 2 mean SR2A and SR2B.","name":"Table 29"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t30","@type":"Dataset","description":"The best expected signal region for stop2 mass 350 GeV and neutralino1 mass 20 GeV, where 1 and 2 mean...","name":"Table 30"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t31","@type":"Dataset","description":"The best expected signal region for stop2 mass 500 GeV and neutralino1 mass 20 GeV, where 1 and 2 mean...","name":"Table 31"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t32","@type":"Dataset","description":"The best expected signal region for stop2 mass 500 GeV and neutralino1 mass 120 GeV, where 1 and 2 mean...","name":"Table 32"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t33","@type":"Dataset","description":"Observed upper limit on the signal cross section for stop2 grid.","name":"Table 33"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t34","@type":"Dataset","description":"Number of generated MC events for stop Natural GMSB model.","name":"Table 34"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t35","@type":"Dataset","description":"Cross section for stop Natural GMSB model.","name":"Table 35"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t36","@type":"Dataset","description":"xsec_stop2.","name":"Table 36"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t37","@type":"Dataset","description":"Ntot_stop2.","name":"Table 37"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t38","@type":"Dataset","description":"Acceptance of stop GMSB model for SR2A.","name":"Table 38"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t39","@type":"Dataset","description":"Efficiency of stop GMSB model for SR2A.","name":"Table 39"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t40","@type":"Dataset","description":"Number of expected signal events of stop GMSB model for SR2A.","name":"Table 40"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t41","@type":"Dataset","description":"Total systematic uncertainty of stop GMSB model for SR2A.","name":"Table 41"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t42","@type":"Dataset","description":"Observed CL_s of stop GMSB model for SR2A.","name":"Table 42"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t43","@type":"Dataset","description":"Expected CL_s of stop GMSB model for SR2A.","name":"Table 43"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t44","@type":"Dataset","description":"Acceptance of stop GMSB model for SR2B.","name":"Table 44"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t45","@type":"Dataset","description":"Efficiency of stop GMSB model for SR2B.","name":"Table 45"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t46","@type":"Dataset","description":"Number of expected signal events of stop GMSB model for SR2B.","name":"Table 46"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t47","@type":"Dataset","description":"Total systematic uncertainty of stop GMSB model for SR2B.","name":"Table 47"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t48","@type":"Dataset","description":"Observed CL_s of stop GMSB model for SR2B.","name":"Table 48"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t49","@type":"Dataset","description":"Expected CL_s of stop GMSB model for SR2B.","name":"Table 49"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t50","@type":"Dataset","description":"Acceptance of stop GMSB model for SR2C.","name":"Table 50"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t51","@type":"Dataset","description":"Efficiency of stop GMSB model for SR2C.","name":"Table 51"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t52","@type":"Dataset","description":"Number of expected signal events of stop GMSB model for SR2C.","name":"Table 52"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t53","@type":"Dataset","description":"Total systematic uncertainty of stop GMSB model for SR2C.","name":"Table 53"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t54","@type":"Dataset","description":"Observed CL_s of stop GMSB model for SR2C.","name":"Table 54"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t55","@type":"Dataset","description":"Expected CL_s of stop GMSB model for SR2C.","name":"Table 55"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t56","@type":"Dataset","description":"Nexp_SR3A.","name":"Table 56"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t57","@type":"Dataset","description":"RelUnc_SR3A.","name":"Table 57"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t58","@type":"Dataset","description":"Acc_SR3A.","name":"Table 58"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t59","@type":"Dataset","description":"Eff_SR3A.","name":"Table 59"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t60","@type":"Dataset","description":"CLsExp_SR3A.","name":"Table 60"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t61","@type":"Dataset","description":"CLs_SR3A.","name":"Table 61"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t62","@type":"Dataset","description":"Nexp_SR3B.","name":"Table 62"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t63","@type":"Dataset","description":"RelUnc_SR3B.","name":"Table 63"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t64","@type":"Dataset","description":"Acc_SR3B.","name":"Table 64"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t65","@type":"Dataset","description":"Eff_SR3B.","name":"Table 65"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t66","@type":"Dataset","description":"CLsExp_SR3B.","name":"Table 66"},{"@id":"https://doi.org/10.17182/hepdata.63210.v1/t67","@type":"Dataset","description":"CLs_SR3B.","name":"Table 67"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins1286622?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/63210"}],"inLanguage":"en","name":"Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in sqrt(s)=8 TeV pp collisions with the ATLAS detector","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins1286622?version=1","version":1}