Experimental study of the radiative decays K+-->mu(+)nue(+)e(-) and K+-->e(+)nue(+)e(-).

was fully reconstructed, i.e.,the resulting photon was observed and included in thekinematic reconstruction. The average efficiency of de-tecting muons with momentum greater than 0.9 GeV/cwas 90%, while the probability of the misidentifying thepion as a muon was about 20%. Because GEANT sim-ulation predicts a larger pion misidentification, the cor-rection factor 0.85 was applied to the simulated efficiencyof the pion detection. To reduce the uncertainty of thiscorrection, the K