Quasielastic charmed-baryon production and exclusive strange-particle production by high-energy neutrinos

Three charmed-baryon candidates produced in the quasielastic reaction $\nu n\to {\mu }^{-}{\Lambda }_c^{+}\to {\mu }^{-}\Lambda {\pi }^{+}$ were found in an exposure of the Fermilab deuterium-filled 15-ft bubble chamber to a wide-band neutrino beam. We also found that the cross section of the associated-production reaction $\nu n\to {\mu }^{-}\Lambda K^{+}$ is (5.5±1.3±1.1) × ${10}^{-40\mathrm{}}$ ${\mathrm{cm}}^2$ for $E_{\nu }>10\mathrm{}$ GeV, and is approximately independent of energy. In addition we studied the cross sections of some quasi-two-body associated strange-particle production reactions other than ${\mu }^{-}\Lambda K^{+}$.