Measurement of the WW gauge boson couplings in pp collisions at s=1.8 TeV

The WWγ gauge boson couplings were measured using pp → lν γ+X ( l = e,μ) events at √s = 1.8 TeV observed with the D0 detector at the Fermilab Tevatron Collider. The signal, obtained from the data corresponding to an integrated luminosity of 13.8 pb -1 , agrees well with the standard model prediction. A fit to the photon transverse energy spectrum yields limits at the 95% confidence level on the CP-conserving anomalous coupling parameters of -1.6<Δκ <1.8 ( λ = 0) and -0.6<λ <0.6 ( Δκ = 0). Similar limits are obtained for the CP-violating coupling parameters.