Contribution of the Δ(1232) to μ-p→nνγ

We examine contributions from the Δ(1232) to radiative capture (at rest) of a muon by a nucleon. This is motivated by the need for a thorough understanding of all contributing amplitudes in order to determine the pseudoscalar weak current and its coupling g/sub P/ from experiments on radiative capture which are now underway or being planned. We find changes as large as 7--8Xin the capture rate at the high-energy end of the photon spectrum and conclude that a precision analysis of the capture process must indeed include Δ effects