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We measure the cross section and the difference in rapidities between photonsand charged leptons for inclusive W -> lnu+gamma production in egamma andmugamma final states. Using data corresponding to an integrated luminosity of4.2 fb-1 collected with the D0 detector at the Fermilab Tevatron Collider, thecross section multiplied by the branching fraction for the process ppbar ->Wgamma+X -> lnugamma+X, measured to be 15.8 +/- 0.8 (stat.) +/- 1.2 (syst.) pb,and the distribution of the charge-signed photon-lepton rapidity difference arefound to be in agreement with the standard model. These results provide themost stringent limits on anomalous WWgamma couplings for data from hadroncolliders: -0.4 < Delta kappa_gamma < 0.4 and -0.08 < lambda_gamma < 0.07 atthe 95% C.L.

Wgamma production and limits on anomalous WWgamma couplings in ppbar collisions