{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.72823.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/1448301"}},{"@id":"https://doi.org/10.1103/PhysRevD.93.112002","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ATLAS Collaboration"},"creator":{"@type":"Organization","name":"ATLAS Collaboration"},"datePublished":"2016","description":"CERN-LHC. The production of $Z$ bosons with one or two isolated high-energy photons is studied using $pp$ collisions at $\\sqrt{s}$ = 8 TeV. The analyses use a data sample with an integrated luminosity of 20.3 fb$^{-1}$ collected by the ATLAS detector during the 2012 LHC data taking. The $Z\\gamma$ and $Z\\gamma\\gamma$ production cross sections are measured with leptonic ($e^{+}e^{-}$, $\\mu^{+}\\mu^{-}$, $\\nu\\bar{\\nu}$) decays of the $Z$ boson, in extended fiducial regions defined in terms of the lepton and photon acceptance. They are then compared to cross-section predictions from the Standard Model, where the sources of the photons are radiation off initial-state quarks and radiative $Z$-boson decay to charged leptons, and from fragmentation of final-state quarks and gluons into photons. The yields of events with photon transverse energy $E_{\\mathrm{T}} >$ 250 GeV from $\\ell^{+}\\ell^{-}\\gamma$ events and with $E_{\\mathrm{T}} >$ 400 GeV from $\\nu\\bar{\\nu}\\gamma$ events are used to search for anomalous triple gauge-boson couplings $ZZ\\gamma$ and $Z\\gamma\\gamma$. The yields of events with diphoton invariant mass $m_{\\gamma\\gamma} >$ 200 GeV from $\\ell^{+}\\ell^{-}\\gamma\\gamma$ events and with $m_{\\gamma\\gamma} > $ 300 GeV from $\\nu\\bar{\\nu}\\gamma\\gamma$ events are used to search for anomalous quartic gauge-boson couplings $ZZ\\gamma\\gamma$ and $Z\\gamma\\gamma\\gamma$. No deviations from Standard Model predictions are observed and limits are placed on parameters used to describe anomalous triple and quartic gauge-boson couplings.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.72823.v1/t1","@type":"Dataset","description":"Measured integrated cross sections for the $Z\\gamma$ process for charged lepton final states at $\\sqrt{s} = 8$ TeV in the...","name":"Table 1"},{"@id":"https://doi.org/10.17182/hepdata.72823.v1/t2","@type":"Dataset","description":"Measured integrated cross sections for the $Z\\gamma$ process for neutrino final states at $\\sqrt{s} = 8$ TeV in the extended...","name":"Table 2"},{"@id":"https://doi.org/10.17182/hepdata.72823.v1/t3","@type":"Dataset","description":"Measured integrated cross sections for the $Z\\gamma\\gamma$ process for charged lepton final states at $\\sqrt{s} = 8$ TeV in the...","name":"Table 3"},{"@id":"https://doi.org/10.17182/hepdata.72823.v1/t4","@type":"Dataset","description":"Measured integrated cross sections for the $Z\\gamma\\gamma$ process for neutrino final state at $\\sqrt{s} = 8$ TeV in the extended...","name":"Table 4"},{"@id":"https://doi.org/10.17182/hepdata.72823.v1/t5","@type":"Dataset","description":"The differential cross sections as a function of $E_{\\mathrm{T}}^{\\gamma}$ for the $pp \\rightarrow \\ell^{+}\\ell^{-}\\gamma$ process in the inclusive $N_{\\mathrm{jets}} \\geq...","name":"Table 5"},{"@id":"https://doi.org/10.17182/hepdata.72823.v1/t6","@type":"Dataset","description":"The differential cross sections as a function of $E_{\\mathrm{T}}^{\\gamma}$ for the $pp \\rightarrow \\ell^{+}\\ell^{-}\\gamma$ process in the exclusive $N_{\\mathrm{jets}} =...","name":"Table 6"},{"@id":"https://doi.org/10.17182/hepdata.72823.v1/t7","@type":"Dataset","description":"The differential cross sections as a function of $E_{\\mathrm{T}}^{\\gamma}$ for the $pp \\rightarrow \\nu\\bar{\\nu}\\gamma$ process in the inclusive $N_{\\mathrm{jets}} \\geq...","name":"Table 7"},{"@id":"https://doi.org/10.17182/hepdata.72823.v1/t8","@type":"Dataset","description":"The differential cross sections as a function of $E_{\\mathrm{T}}^{\\gamma}$ for the $pp \\rightarrow \\nu\\bar{\\nu}\\gamma$ process in the exclusive $N_{\\mathrm{jets}} =...","name":"Table 8"},{"@id":"https://doi.org/10.17182/hepdata.72823.v1/t9","@type":"Dataset","description":"The differential cross sections as a function of $m_{\\ell^{+}\\ell^{-}\\gamma}$ for the $pp \\rightarrow \\ell^{+}\\ell^{-}\\gamma$ process in the inclusive $N_{\\mathrm{jets}} \\geq...","name":"Table 9"},{"@id":"https://doi.org/10.17182/hepdata.72823.v1/t10","@type":"Dataset","description":"The differential cross sections as a function of $m_{\\ell^{+}\\ell^{-}\\gamma}$ for the $pp \\rightarrow \\ell^{+}\\ell^{-}\\gamma$ process in the exclusive $N_{\\mathrm{jets}} =...","name":"Table 10"},{"@id":"https://doi.org/10.17182/hepdata.72823.v1/t11","@type":"Dataset","description":"The cross sections as a function of $N_{\\mathrm{jets}}$ for the $pp \\rightarrow \\ell^{+}\\ell^{-}\\gamma$ process in the extended fiducial region. The...","name":"Table 11"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins1448301?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/72823"}],"inLanguage":"en","name":"Measurements of $Z\\gamma$ and $Z\\gamma\\gamma$ production in $pp$ collisions at $\\sqrt{s}=$ 8 TeV with the ATLAS detector","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins1448301?version=1","version":1}