Strange-particle production in high-energyν¯andνcharged-current interactions on protons

We have studied the semi-inclusive reactions $\overline{\nu }p\to {\mu }^{+}{V}^{0}X$ and $\nu p\to {\mu }^{-}{V}^{0}X$, and measured the fractional rate for producing one or more neutral strange particles in these reactions to be 0.16±0.03 and 0.15±0.04, respectively. We have observed $K^{-}\mathrm{}\left(892\right)\mathrm{}$ and ${\Sigma }^{-}\mathrm{}\left(1385\right)\mathrm{}$ production in $\overline{\nu }p$ scattering at a few percent of the inclusive rate. No evidence for $D^0$ production was seen in the $K_S^0{\pi }^{+}{\pi }^{-}$ final state. The distributions in the standard deep-inelastic kinematic variables are presented for events with strange particles and compared to those for the other charged-current data. The fragmentation properties of events containing a $K_S^0$ are in agreement with results from electroproduction experiments, and we have measured $\int {0.3}^{1.0}\left(\frac{1}{N_T}\right)\left(\frac{\mathrm{dN}}{\mathrm{dz}}\right)\mathrm{dz}=0.029\mathrm{}\pm 0.005$, which is smaller than the prediction of the Field and Feynman fragmentation model.