{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.159761.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/2918816"}},{"@id":"https://doi.org/10.1103/44zp-mh1q","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ATLAS Collaboration"},"creator":{"@type":"Organization","name":"ATLAS Collaboration"},"datePublished":"2025","description":"A search is presented for hadronic signatures of beyond the Standard Model (BSM) physics, with an emphasis on signatures of a strongly-coupled hidden dark sector accessed via resonant production of a $Z'$ mediator. The ATLAS experiment dataset collected at the Large Hadron Collider from 2015 to 2018 is used, consisting of proton-proton collisions at $\\sqrt{s}$ = 13 TeV and corresponding to an integrated luminosity of 140 fb$^{-1}$. The $Z'$ mediator is considered to decay to two dark quarks, which each hadronize and decay to showers containing both dark and Standard Model particles, producing a topology of interacting and non-interacting particles within a jet known as ``semi-visible\". Machine learning methods are used to select these dark showers and reject the dominant background of mismeasured multijet events, including an anomaly detection approach to preserve broad sensitivity to a variety of BSM topologies. A resonance search is performed by fitting the transverse mass spectrum based on a functional form background estimation. No significant excess over the expected background is observed. Results are presented as limits on the production cross section of semi-visible jet signals, parameterized by the fraction of invisible particles in the decay and the $Z'$ mass, and by quantifying the significance of any generic Gaussian-shaped mass peak in the anomaly region.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.159761.v1/t1","@type":"Dataset","description":"Acceptance times efficiency weighted yields across the signal grid.","name":"Table 1"},{"@id":"https://doi.org/10.17182/hepdata.159761.v1/t2","@type":"Dataset","description":"The 95% CL limits on the cross-section $\\sigma(pp \\rightarrow Z' \\rightarrow \\chi \\chi$) times branching ratio B in fb with...","name":"Table 2"},{"@id":"https://doi.org/10.17182/hepdata.159761.v1/t3","@type":"Dataset","description":"The 95% CL limits on the cross-section $\\sigma(pp \\rightarrow Z' \\rightarrow \\chi \\chi$) times branching ratio B in fb with...","name":"Table 3"},{"@id":"https://doi.org/10.17182/hepdata.159761.v1/t4","@type":"Dataset","description":"The 95% CL limits on the cross-section $\\sigma(pp \\rightarrow Z' \\rightarrow \\chi \\chi$) times branching ratio B in fb with...","name":"Table 4"},{"@id":"https://doi.org/10.17182/hepdata.159761.v1/t5","@type":"Dataset","description":"Data yield in the PFN signal region.","name":"Table 5"},{"@id":"https://doi.org/10.17182/hepdata.159761.v1/t6","@type":"Dataset","description":"Yield of data in the ANTELOPE signal region in the binning used for BumpHunter fitting.","name":"Table 6"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins2918816?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/159761"}],"inLanguage":"en","name":"Search for new physics in final states with semi-visible jets or anomalous signatures using the ATLAS detector","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins2918816?version=1","version":1}