Measurements of Theσc0−λc+

Measurements of ${\ensuremath{\Sigma}}_{c}^{0}\ensuremath{-}{{\ensuremath{\Lambda}}_{c}}^{+}$ and ${{\ensuremath{\Sigma}}_{c}}^{++}\ensuremath{-}{{\ensuremath{\Lambda}}_{c}}^{+}$ mass differences have been made in a beam of incident neutrons. Our ${{\ensuremath{\Sigma}}_{c}}^{++}\ensuremath{-}{{\ensuremath{\Lambda}}_{c}}^{+}$ mass-difference measurement is 167.4\ifmmode\pm\else\textpm\fi{}2.1 MeV/${\mathit{c}}^{2}$, in good agreement with previous results. We measure the ${\ensuremath{\Sigma}}_{c}^{0}\ensuremath{-}{{\ensuremath{\Lambda}}_{c}}^{+}$ mass difference to be 178.2\ifmmode\pm\else\textpm\fi{}2.0 MeV/${\mathit{c}}^{2}$. We use these measurements to determine the ${{\ensuremath{\Sigma}}_{c}}^{++}\ensuremath{-}{\ensuremath{\Sigma}}_{c}^{0}$ mass splitting to be -10.8\ifmmode\pm\else\textpm\fi{}2.0 MeV/${\mathit{c}}^{2}$.