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002957059 005__ 20260318234951.0
002957059 0248_ $$aoai:cds.cern.ch:2957059$$pcerncds:FULLTEXT$$pcerncds:cms-pas
002957059 037__ $$aCMS-PAS-TOP-25-003
002957059 110__ $$aCMS Collaboration
002957059 245__ $$aMeasurement of single top and ttbar production cross sections in association with a photon in proton-proton
collisions at sqrt(s) = 13 TeV
002957059 260__ $$c2026
002957059 269__ $$aGeneva$$bCERN
002957059 520__ $$aMeasurements of fiducial inclusive and differential cross sections for photon-associated production of single top quarks $\mathrm{t}\gamma\mathrm{q}$ and top quark pairs $\mathrm{t\bar{t}}\gamma$ are performed in proton--proton collisions at a center-of-mass energy of 13$~\mathrm{TeV}$. A sample of events is selected, containing a single isolated electron or muon, an isolated photon, and at least two jets, including one identified as originating from a $\mathrm{b}$ quark. The data were recorded with the CMS detector at the CERN LHC and correspond to an integrated luminosity of $138~\mathrm{fb}^{-1}$. A profile likelihood fit is employed to unfold the cross sections, account for systematic uncertainties, and determine the correlations between the two signal processes in a single global fit. The fiducial $\mathrm{t}\gamma\mathrm{q}$ and $\mathrm{t\bar{t}}\gamma$ cross sections are measured to be $237_{-17}^{+17}\,\mathrm{fb}$ and $1445_{-81}^{+81}\,\mathrm{fb}$, respectively, in a phase space requiring events with a high momentum, isolated photon. Differential measurements as a function of lepton, photon, light jet, and top quark kinematic observables are performed at the particle and parton levels. All results are found to be in good agreement with theoretical predictions.
002957059 6531_ $$9CMS$$aMonte-Carlo
002957059 65017 $$2SzGeCERN$$aParticle Physics - Experiment
002957059 693__ $$aCERN LHC$$eCMS
002957059 690C_ $$aCERN
002957059 710__ $$gCMS Collaboration
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002957059 859__ $$fcms-pag-conveners-top@cern.ch
002957059 980__ $$aNOTE
002957059 980__ $$aCMS-PHYSICS-ANALYSIS-SUMMARIES