{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.166215.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/3162057"}}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"CMS Collaboration"},"creator":{"@type":"Organization","name":"CMS Collaboration"},"datePublished":"2026","description":"A search for new scalar particles of $\\mathcal{O}$(GeV) mass in exclusive final states with muons and light hadrons is presented. The analysis uses proton-proton collision data produced at a center-of-mass energy of 13 TeV collected by the CMS experiment at the CERN LHC in 201$-$2018, corresponding to an integrated luminosity of 138 fb$^{-1}$. The search targets exotic decays of the Higgs boson to a pair of prompt or long-lived identical scalar particles with proper decay lengths $c\u03c4$ up to 100 mm and masses within the range of 0.4$-$2.0 GeV. This mass window corresponds to a unique parameter space where hadronic decays of these particles mostly result in a pair of light hadrons. The considered experimental signature is a collimated pair of muons and another pair of charged kaons or pions, each of which may be prompt or displaced. The analysis improves the sensitivity to very light scalar boson masses and demonstrates a novel approach to probe hadronic decays of light scalar bosons. Upper limits on the branching fraction of the Higgs boson to scalar bosons at the level of $\\mathcal{O}$(10$^{-4}$) are obtained for several scalar boson masses between 0.4 and 2.0 GeV, with proper decay lengths of up to $\\sim$1 mm.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.166215.v1/t1","@type":"Dataset","description":"Two-dimensional distribution of the invariant masses $m_{hh}$ versus $m_{\\mu\\mu}$ for a BSM scalar boson of $m_{S}=0.6$ GeV and proper lifetime...","name":"Figure 2a"},{"@id":"https://doi.org/10.17182/hepdata.166215.v1/t2","@type":"Dataset","description":"Two-dimensional distribution of the invariant masses $m_{hh}$ versus $m_{\\mu\\mu}$ for the 2016--2018 data set in the CR, after the baseline...","name":"Figure 2b"},{"@id":"https://doi.org/10.17182/hepdata.166215.v1/t3","@type":"Dataset","description":"Two-dimensional distribution of the transverse displacement significance $L^{hh}_{xy}/\\sigma^{hh}_{xy}$ vs $L^{\\mu\\mu}_{xy}/\\sigma^{\\mu\\mu}_{xy}$ for BSM scalar boson with $m_{S}=0.6$ GeV and $c\\tau=1$ mm...","name":"Figure 3a"},{"@id":"https://doi.org/10.17182/hepdata.166215.v1/t4","@type":"Dataset","description":"Two-dimensional distribution of the transverse displacement significance $L^{hh}_{xy}/\\sigma^{hh}_{xy}$ vs $L^{\\mu\\mu}_{xy}/\\sigma^{\\mu\\mu}_{xy}$ for the 2016--2018 data set in the CR after the...","name":"Figure 3b"},{"@id":"https://doi.org/10.17182/hepdata.166215.v1/t5","@type":"Dataset","description":"Four-object invariant mass distributions in data (black dots with error bars) and for a BSM scalar boson signal with $m_{S}=0.6$...","name":"Figure 4a"},{"@id":"https://doi.org/10.17182/hepdata.166215.v1/t6","@type":"Dataset","description":"Four-object invariant mass distributions in data (black dots with error bars) and for a BSM scalar boson signal with $m_{S}=0.6$...","name":"Figure 4b"},{"@id":"https://doi.org/10.17182/hepdata.166215.v1/t7","@type":"Dataset","description":"Four-object invariant mass distributions in data (black dots with error bars) and for a BSM scalar boson signal with $m_{S}=0.6$...","name":"Figure 4c"},{"@id":"https://doi.org/10.17182/hepdata.166215.v1/t8","@type":"Dataset","description":"Four-object invariant mass distributions in data (black dots with error bars) and for a BSM scalar boson signal with $m_{S}=0.6$...","name":"Figure 4d"},{"@id":"https://doi.org/10.17182/hepdata.166215.v1/t9","@type":"Dataset","description":"Average diobject invariant mass distributions in the SR for the $prompt$ category. The full event selection criteria of has been...","name":"Figure 5a"},{"@id":"https://doi.org/10.17182/hepdata.166215.v1/t10","@type":"Dataset","description":"Average diobject invariant mass distributions in the SR for the $displaced$ $\\mu\\mu$ category. The full event selection criteria of has...","name":"Figure 5b"},{"@id":"https://doi.org/10.17182/hepdata.166215.v1/t11","@type":"Dataset","description":"Average diobject invariant mass distributions in the SR for the $displaced$ $hh$ category. The full event selection criteria of has...","name":"Figure 5c"},{"@id":"https://doi.org/10.17182/hepdata.166215.v1/t12","@type":"Dataset","description":"Average diobject invariant mass distributions in the SR for the $displaced$ category. The full event selection criteria of has been...","name":"Figure 5d"},{"@id":"https://doi.org/10.17182/hepdata.166215.v1/t13","@type":"Dataset","description":"The four-object invariant mass distribution for the 2016--2018 dataset in the $prompt$ category after the application of the full event...","name":"Figure 6a"},{"@id":"https://doi.org/10.17182/hepdata.166215.v1/t14","@type":"Dataset","description":"The four-object invariant mass distribution for the 2016--2018 dataset in the merged nonprompt (right) category after the application of the...","name":"Figure 6b"},{"@id":"https://doi.org/10.17182/hepdata.166215.v1/t15","@type":"Dataset","description":"Observed (solid black line) and expected (dashed black line) exclusion limits on the branching fraction $\\mathcal{B}(H\\to SS)$ as functions of...","name":"Figure 7a"},{"@id":"https://doi.org/10.17182/hepdata.166215.v1/t16","@type":"Dataset","description":"Observed (solid black line) and expected (dashed black line) exclusion limits on 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