{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.100165.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/1829749"}},{"@id":"https://doi.org/10.1016/j.physletb.2021.136409","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"CMS Collaboration"},"creator":{"@type":"Organization","name":"CMS Collaboration"},"datePublished":"2021","description":"A search is performed for the rare decay $\\mathrm{W^{\\pm}}\\to\\pi\\gamma$ in proton-proton collisions at $\\sqrt{s} = 13~\\mathrm{TeV}$. Data corresponding to an integrated luminosity of $137~\\mathrm{fb^{-1}}$ were collected during 2016 to 2018 with the CMS detector. This analysis exploits a novel search strategy based on W boson production in top quark pair events. An inclusive search for the $\\mathrm{W^{\\pm}}\\to\\pi\\gamma$ decay is not optimal at the LHC because of the high trigger thresholds. Instead, a trigger selection is exploited in which the W boson originating from one of the top quarks is used to tag the event in a leptonic decay. The W boson emerging from the other top quark is used to search for the $\\mathrm{W^{\\pm}}\\to\\pi\\gamma$ signature. Such decays are characterized by an isolated track pointing to a large energy deposit, and by an isolated photon of large transverse momentum. The presence of b quark jets reduces the background from the hadronization of light-flavor quarks and gluons. The $\\mathrm{W^{\\pm}}\\to\\pi\\gamma$ decay is not observed. An upper exclusion limit is set to this branching fraction, corresponding to $1.50\\times 10^{-5}$ at $95\\%$ confidence level, whereas the expected upper exclusion limit is $0.85^{+0.52}_{-0.29} \\times 10^{-5}$.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.100165.v1/t1","@type":"Dataset","description":"The product of signal efficiency and acceptance per year and per lepton channel (muon or electron).","name":"Table 1"},{"@id":"https://doi.org/10.17182/hepdata.100165.v1/t2","@type":"Dataset","description":"Expected and observed upper exclusion limits on the branching fraction of the decay of a W boson into a pion...","name":"Table 2"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins1829749?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/100165"}],"inLanguage":"en","name":"Search for the rare decay of the W boson into a pion and a photon 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/ins1829749?version=1","version":1}