Limits on anomalous WWγ couplings from pp̅→Wγ+X events at √s=1.8 TeV

We have measured the WWγ gauge boson coupling parameters using pp→lνγ+X (l=e,μ) events at √s=1.8 TeV. The data, corresponding to an integrated luminosity of 92.8 pb -1 , were collected using the DO detector at the Fermilab Tevatron Collider. The measured cross section times branching ratio for pp→Wγ+X with p T γ >10 GeV/c and R lγ >0.7 is 11.3 -1.5 +1.7 ±1.5 pb, in agreement with the standard model prediction. The 1 degree of freedom 95% confidence level limits on individual CP-conserving parameters are -0.93<Δκ<0.94 and -0.31<λ<0.29. Similar limits are set on the CP-violating coupling parameters.