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The analysis uses the presence of a forward jet, characteristic of $t$-channel production, and separates the signal from the background with neural networks. Requiring a photon with transverse momentum larger than $20\\,$GeV and within the detector acceptance, the fiducial cross section is measured to be $688\\,\\pm\\,23 \\, \\mathrm{(stat.)} \\, ^{+75}_{-71} \\, \\mathrm{(syst.)}\\,$fb, to be compared with the Standard Model prediction of $515\\,^{+36}_{-42}\\,$fb at next-to-leading order in QCD.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.134244.v1/t1","@type":"Dataset","description":"This table shows the values for $\\sigma_{tq\\gamma}\\times\\mathcal{B}(t\\rightarrow l\\nu b)$ and $\\sigma_{tq\\gamma}\\times\\mathcal{B}(t\\rightarrow l\\nu b)+\\sigma_{t(\\rightarrow l\\nu b\\gamma)q}$ obtained by a profile-likelihood fit...","name":"Fitted fiducial cross sections"},{"@id":"https://doi.org/10.17182/hepdata.134244.v1/t2","@type":"Dataset","description":"Distribution of the reconstructed top-quark mass in the $W\\gamma\\,$CR before the profile-likelihood fit. The \"Total\" column corresponds to the sum...","name":"Figure 02"},{"@id":"https://doi.org/10.17182/hepdata.134244.v1/t3","@type":"Dataset","description":"Distribution of the NN output in the 0fj$\\,$SR in data and the expected contribution of the signal and background processes...","name":"Figure 03a"},{"@id":"https://doi.org/10.17182/hepdata.134244.v1/t4","@type":"Dataset","description":"Distribution of the NN output in the $\\geq$1fj$\\,$SR in data and the expected contribution of the signal and background processes...","name":"Figure 03b"},{"@id":"https://doi.org/10.17182/hepdata.134244.v1/t5","@type":"Dataset","description":"Distribution of the NN output in the $t\\bar{t}\\gamma\\,$CR in data and the expected contribution of the signal and background processes...","name":"Figure 03c"},{"@id":"https://doi.org/10.17182/hepdata.134244.v1/t6","@type":"Dataset","description":"Total event yield in the $W\\gamma\\,$CR in data and the expected contribution of the signal and background 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