{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.156776.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/2835159"}},{"@id":"https://doi.org/10.1007/JHEP12(2024)116","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ATLAS Collaboration"},"creator":{"@type":"Organization","name":"ATLAS Collaboration"},"datePublished":"2025","description":"This paper presents a search for supersymmetric particles in models with highly compressed mass spectra, in events consistent with being produced through vector boson fusion. The search uses 140/fb of proton--proton collision data at sqrt(s) = 13 TeV collected by the ATLAS experiment at the Large Hadron Collider. Events containing at least two jets with a large gap in pseudorapidity, large missing transverse momentum, and no reconstructed leptons are selected.  A boosted decision tree is used to separate events consistent with the production of supersymmetric particles from those due to Standard Model backgrounds. The data are found to be consistent with Standard Model predictions. The results are interpreted using simplified models of R-parity-conserving supersymmetry in which the lightest supersymmetric partner is a bino-like neutralino with a mass similar to that of the lightest chargino and second-to-lightest neutralino, both of which are wino-like. Lower limits at 95% confidence level on the masses of next-to-lightest supersymmetric partners in this simplified model are established between 117 and 120 GeV when the lightest supersymmetric partners are within 1 GeV in mass.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.156776.v1/t1","@type":"Dataset","description":"Observed and predicted background distributions of the BDT score in $\\text{SR}_\\text{2j}$ after the exclusion fit. The nominal, pre-fit prediction of...","name":"Event yields in $\\text{SR}_\\text{2j}$ from Figure 7a"},{"@id":"https://doi.org/10.17182/hepdata.156776.v1/t2","@type":"Dataset","description":"Observed and predicted background distributions of the BDT score in $\\text{SR}_{\\geq3\\text{j}}$ after the exclusion fit. The nominal, pre-fit prediction of...","name":"Event yields in $\\text{SR}_{\\geq3\\text{j}}$ from Figure 7b"},{"@id":"https://doi.org/10.17182/hepdata.156776.v1/t3","@type":"Dataset","description":"Expected (dashed black line) and observed (solid red line) 95% CL exclusion limits on the compressed SUSY simplified model with...","name":"Expected exclusion limits from Figure 8"},{"@id":"https://doi.org/10.17182/hepdata.156776.v1/t4","@type":"Dataset","description":"Expected (dashed black line) and observed (solid red line) 95% CL exclusion limits on the compressed SUSY simplified model with...","name":"Expected - $1\\sigma$ exclusion limits from Figure 8"},{"@id":"https://doi.org/10.17182/hepdata.156776.v1/t5","@type":"Dataset","description":"Expected (dashed black line) and observed (solid red line) 95% CL exclusion limits on the compressed SUSY simplified model with...","name":"Observed exclusion limits from Figure 8"},{"@id":"https://doi.org/10.17182/hepdata.156776.v1/t6","@type":"Dataset","description":"The expected upper limits on the cross-sections at 95% CL for the simplified SUSY model featuring the production of mass-degenerate...","name":"Expected cross-section upper limits from Aux. 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All of the considered production modes ($\\widetilde{\\chi}_{2}^{0}\\widetilde{\\chi}_{1}^{\\pm}$, $\\widetilde{\\chi}_{1}^{\\pm}\\widetilde{\\chi}_{1}^{\\mp}$, $\\widetilde{\\chi}_{2}^{0}\\widetilde{\\chi}_{2}^{0}$,...","name":"Acceptance in $\\text{SR}_{\\geq\\text{3j}}$ from Aux. Figure 2b"},{"@id":"https://doi.org/10.17182/hepdata.156776.v1/t10","@type":"Dataset","description":"Signal efficiencies in $\\text{SR}_\\text{2j}$ with BDT score $\\in [0.88, 1.0]$. All of the considered production modes ($\\widetilde{\\chi}_{2}^{0}\\widetilde{\\chi}_{1}^{\\pm}$, $\\widetilde{\\chi}_{1}^{\\pm}\\widetilde{\\chi}_{1}^{\\mp}$, $\\widetilde{\\chi}_{2}^{0}\\widetilde{\\chi}_{2}^{0}$, and...","name":"Efficiency in $\\text{SR}_\\text{2j}$ from Aux. Figure 3a"},{"@id":"https://doi.org/10.17182/hepdata.156776.v1/t11","@type":"Dataset","description":"Signal efficiencies in $\\text{SR}_{\\geq\\text{3j}}$ with BDT score $\\in [0.88, 1.0]$. All of the considered production modes ($\\widetilde{\\chi}_{2}^{0}\\widetilde{\\chi}_{1}^{\\pm}$, $\\widetilde{\\chi}_{1}^{\\pm}\\widetilde{\\chi}_{1}^{\\mp}$, $\\widetilde{\\chi}_{2}^{0}\\widetilde{\\chi}_{2}^{0}$, and...","name":"Efficiency in $\\text{SR}_{\\geq\\text{3j}}$ from Aux. Figure 3b"},{"@id":"https://doi.org/10.17182/hepdata.156776.v1/t12","@type":"Dataset","description":"Event selection cutflows for signal samples with $m(\\tilde\\chi^0_2) =100~\\text{GeV}$ and $\\Delta m(\\tilde\\chi^0_2 / \\tilde\\chi^\\pm_1,\\tilde\\chi^0_1) = 0.2~\\text{GeV}, 1.0~\\text{GeV},$ and $5.0~\\text{GeV}$. The...","name":"Signal cutflow from Aux. 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