{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.102955.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/1852325"}},{"@id":"https://doi.org/10.1016/j.physletb.2021.136412","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ATLAS Collaboration"},"creator":{"@type":"Organization","name":"ATLAS Collaboration"},"datePublished":"2022","description":"CERN-LHC, ATLAS.  A search for the Higgs boson decaying into a photon and a pair of electrons or muons with an invariant mass $m_{\\ell\\ell} < 30$ GeV is presented. The analysis is performed using 139 fb$^{-1}$ of proton-proton collision data, produced by the LHC at a centre-of-mass energy of 13 TeV and collected by the ATLAS experiment. Evidence for the $H \\rightarrow \\ell \\ell \\gamma$ process is found with a significance of 3.2$\\sigma$ over the background-only hypothesis, compared to an expected significance of 2.1$\\sigma$. The best-fit value of the signal strength parameter, defined as the ratio of the observed signal yield to the one expected in the Standard Model, is $\\mu = 1.5 \\pm 0.5$. The Higgs boson production cross-section times the $H \\rightarrow\\ell\\ell\\gamma$ branching ratio for $m_{\\ell\\ell} <$ 30 GeV is determined to be 8.7 $^{+2.8}_{-2.7}$ fb.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.102955.v1/t1","@type":"Dataset","description":"Number of data events selected in each analysis category in the $m_{\\ell\\ell\\gamma}$ mass range of 110--160 GeV. In addition, the...","name":"Table 1"},{"@id":"https://doi.org/10.17182/hepdata.102955.v1/t2","@type":"Dataset","description":"The best fit value for the signal yield normalised to the Standard Model prediction (signal strength) for $pp \\to H...","name":"Table 2"},{"@id":"https://doi.org/10.17182/hepdata.102955.v1/t3","@type":"Dataset","description":"Measured $\\sigma( p p \\rightarrow H) \\cdot B(H\\rightarrow \\ell\\ell\\gamma)$ for $m_{\\ell\\ell} < 30$ GeV","name":"Table 3"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins1852325?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/102955"}],"inLanguage":"en","name":"Evidence for Higgs boson decays to a low-mass dilepton system and a photon in pp collisions at $\\sqrt{s} =$ 13 TeV with the ATLAS detector","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins1852325?version=1","version":1}