{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.91241.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/1750600"}},{"@id":"https://doi.org/10.1016/j.physletb.2019.135082","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ATLAS Collaboration"},"creator":{"@type":"Organization","name":"ATLAS Collaboration"},"datePublished":"2019","description":"CERN-LHC, ATLAS. A search for flavour-changing neutral current events via the coupling of a top quark, a photon, and an up or charm quark is presented using 81$fb^{\u22121}$ of proton-proton collision data taken at a centre-of-mass energy of 13 TeV with the ATLAS detector at the LHC. Events with a photon, an electron or muon, a $b$-tagged jet, and missing transverse momentum are selected. A neural network based on kinematic variables differentiates between events from signal and background processes. The data are consistent with the background-only hypothesis, and limits are set on the strength of the $tq\\gamma$ coupling in an effective field theory. These are also interpreted as 95 % CL upper limits on the cross section for FCNC $t\\gamma$ production via a left-handed (right-handed) $tu\\gamma$ coupling of 36 fb (78 fb) and on the branching ratio for $t \\rightarrow \\gamma u$ of $2.8 \\times 10^{\u22125}$ ($6.1 \\times 10^{\u22125}$). In addition, they are interpreted as 95 % CL upper limits on the cross section for FCNC $t\\gamma$ production via a left-handed (right-handed) $tc\\gamma$ coupling of 40 fb (33 fb) and on the branching ratio for $t \\rightarrow \\gamma c$ of $22 \\times 10^{\u22125}$ ($18 \\times 10^{\u22125}$).","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.91241.v1/t1","@type":"Dataset","description":"Post-fit distributions of a background-only fit to the signal region (SR) and the control regions (CRs) of the NN output...","name":"Figure 2(a)"},{"@id":"https://doi.org/10.17182/hepdata.91241.v1/t2","@type":"Dataset","description":"Observed (expected) 95 % CL limits on the effective coupling strengths for different vertices and couplings, the production cross section,...","name":"Table 1"},{"@id":"https://doi.org/10.17182/hepdata.91241.v1/t3","@type":"Dataset","description":"Post-fit distributions of a background-only fit to the SR and the CRs of the NN output in the SR for...","name":"Auxiliary Figure 2(a)"},{"@id":"https://doi.org/10.17182/hepdata.91241.v1/t4","@type":"Dataset","description":"Post-fit distributions of a background-only fit to the SR and the CRs of the NN output in the SR for...","name":"Auxiliary Figure 2(b)"},{"@id":"https://doi.org/10.17182/hepdata.91241.v1/t5","@type":"Dataset","description":"Post-fit distributions of a background-only fit to the SR and the CRs of the NN output in the SR for...","name":"Auxiliary Figure 2(c)"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins1750600?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/91241"}],"inLanguage":"en","name":"Search for flavour-changing neutral currents in processes with one top quark and a photon using 81 fb$^{-1}$ of $pp$ collisions at $\\sqrt{s} = 13$ TeV with the ATLAS experiment","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins1750600?version=1","version":1}