Coincidence Measurements of SingleK+Electroproduction

We have studied the reactions $e^{-}+p\to e^{-}+K^{+}+\Lambda$ and $e^{-}+p\to e^{-}+K^{+}+{\Sigma }^0$ by detecting the final electron and kaon in coincidence. Data are presented in the region of virtual-photon mass squared from - 0.18 to - 1.2 Ge${\mathrm{V}}^2$, virtual-photoproduction center-of-mass energy from 1.85 to 2.60 GeV, and virtual-photoproduction center-of-mass angle from 0 to 28°. The $\frac{{\Sigma }^0}{\Lambda }$ ratio tends to be smaller than in photoproduction, and the data suggest large scalar production of the $K^{+}\Lambda$ final state.