{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.166436.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/3149777"}}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"CMS Collaboration"},"creator":{"@type":"Organization","name":"CMS Collaboration"},"datePublished":"2026","description":"A search is presented for higgsino and wino dark matter (DM) in final states with a low momentum (soft), isolated track and large missing transverse momentum.In the minimal supersymmetric standard model (MSSM), charginos are most often produced in association with a nearly mass-degenerate neutralino or another chargino, and predominantly decay into the lightest neutralino (DM candidate) and a soft pion. For a mass difference $\\Delta m^{\\pm}$ less than $1$ $\\mathrm{GeV}$, a discernible displacement of the pion's track with respect to the primary vertex can arise, reaching up to about $1$ $\\mathrm{cm}$ for the smallest allowed $\\Delta m^{\\pm}$.  A parameterized multivariate classifier is employed to distinguish the signal track from background tracks, optimally targeting a range of $\\Delta m^{\\pm}$ by exploiting the track transverse momentum, impact parameter, and event topology to varying degrees depending on the assumed $\\Delta m^{\\pm}$.  The analyzed data correspond to an integrated luminosity of $138$ $\\mathrm{fb}^{-1}$ collected by the CMS experiment in proton-proton collisions at $\\sqrt{s}=13\\, \\mathrm{TeV}$.  No evidence of new physics is observed, and limits are set at the $95\\%$ confidence level in the mass plane of the model. Assuming MSSM cross sections, values of $\\Delta m^{\\pm}$ between $0.28$ and $1.15$ $\\mathrm{GeV}$ are excluded for a $100$ $\\mathrm{GeV}$ mass chargino, and chargino masses up to $185$ $\\mathrm{GeV}$ are excluded for $\\Delta m^{\\pm}$ of $0.55$ $\\mathrm{GeV}$.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.166436.v1/t1","@type":"Dataset","description":"Distribution of the track transverse momentum for data and simulation. The table contains the observed counts, the total refined background...","name":"Figure 2a"},{"@id":"https://doi.org/10.17182/hepdata.166436.v1/t2","@type":"Dataset","description":"Distribution of the transverse impact-parameter significance of selected tracks for data and simulation. The table contains the observed counts, the...","name":"Figure 2b"},{"@id":"https://doi.org/10.17182/hepdata.166436.v1/t3","@type":"Dataset","description":"Distribution of the maximum parameterized neural-network signal-node output evaluated at $\\Delta m_{in}^{\\pm}=0.3$ GeV. The four highest-score bins define the signal...","name":"Figure 3a"},{"@id":"https://doi.org/10.17182/hepdata.166436.v1/t4","@type":"Dataset","description":"Distribution of the maximum parameterized neural-network signal-node output evaluated at $\\Delta m_{in}^{\\pm}=0.6$ GeV. The four highest-score bins define the signal...","name":"Figure 3b"},{"@id":"https://doi.org/10.17182/hepdata.166436.v1/t5","@type":"Dataset","description":"Distribution of the maximum parameterized neural-network signal-node output evaluated at $\\Delta m_{in}^{\\pm}=1.0$ GeV. The four highest-score bins define the signal...","name":"Figure 3c"},{"@id":"https://doi.org/10.17182/hepdata.166436.v1/t6","@type":"Dataset","description":"Observed event counts in the 12 signal regions together with the total background prediction, its statistical uncertainty, the individual background...","name":"Figure 5a"},{"@id":"https://doi.org/10.17182/hepdata.166436.v1/t7","@type":"Dataset","description":"Expected 95% CL upper limit on the inclusive higgsino production cross section.","name":"Figure 5b (expected contour)"},{"@id":"https://doi.org/10.17182/hepdata.166436.v1/t8","@type":"Dataset","description":"Observed 95% CL upper limit on the inclusive higgsino production cross section.","name":"Figure 5b (observed contour)"},{"@id":"https://doi.org/10.17182/hepdata.166436.v1/t9","@type":"Dataset","description":"Expected 95% CL upper limit on the inclusive higgsino production cross section as a function of mass and mass splitting....","name":"Figure 5b (expected heatmap)"},{"@id":"https://doi.org/10.17182/hepdata.166436.v1/t10","@type":"Dataset","description":"Observed 95% CL upper limit on the inclusive higgsino production cross section as a function of mass and mass splitting.The...","name":"Figure 5b (observed heatmap)"},{"@id":"https://doi.org/10.17182/hepdata.166436.v1/t11","@type":"Dataset","description":"Cut-flow efficiencies for representative background processes. Each entry gives the efficiency of the listed selection step relative to the previous...","name":"Cut flow for background processes"},{"@id":"https://doi.org/10.17182/hepdata.166436.v1/t12","@type":"Dataset","description":"Cut-flow efficiencies for representative signal model points. Each entry gives the efficiency of the listed selection step relative to the...","name":"Cut flow for signal model points"},{"@id":"https://doi.org/10.17182/hepdata.166436.v1/t13","@type":"Dataset","description":"Integrated signal efficiency for the published higgsino signal model, from generated events through the full analysis selection, including the baseline...","name":"Signal efficiency map"},{"@id":"https://doi.org/10.17182/hepdata.166436.v1/t14","@type":"Dataset","description":"Event-level efficiency map for the 0.3 GeV signal-region category, parameterized as a function of generated missing transverse momentum, chargino decay...","name":"ML proxy efficiency map for SR 0.3 GeV category"},{"@id":"https://doi.org/10.17182/hepdata.166436.v1/t15","@type":"Dataset","description":"Event-level efficiency map for the 0.6 GeV signal-region category, parameterized as a function of generated missing transverse momentum, chargino decay...","name":"ML proxy efficiency map for SR 0.6 GeV category"},{"@id":"https://doi.org/10.17182/hepdata.166436.v1/t16","@type":"Dataset","description":"Event-level efficiency map for the 1.0 GeV signal-region category, parameterized as a function of generated missing transverse momentum, chargino decay...","name":"ML proxy efficiency map for SR 1.0 GeV category"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins3149777?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/166436"}],"inLanguage":"en","name":"Search for electroweakinos in compressed-spectrum scenarios with low-momentum isolated tracks in proton-proton collisions at $\\sqrt{s}$ = 13 TeV","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins3149777?version=1","version":1}