Observation of a Charmed Baryon Decaying to<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>D</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:mi>p</mml:mi></mml:math>at a Mass Near<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>2.94</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>GeV</mml:mi><mml:mo>/</mml:mo><mml:msup><mml:mi>c</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:math>

A search for charmed baryons decaying to ${D}^{0}p$ reveals two states: the ${\ensuremath{\Lambda}}_{c}(2880{)}^{+}$ baryon and a previously unobserved state at a mass of $[2939.8\ifmmode\pm\else\textpm\fi{}1.3(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}1.0(\mathrm{syst})]\text{ }\text{ }\mathrm{MeV}/{c}^{2}$ and with an intrinsic width of $[17.5\ifmmode\pm\else\textpm\fi{}5.2(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}5.9(\mathrm{syst})]\text{ }\text{ }\mathrm{MeV}$. Consistent and significant signals are observed for the ${K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ and ${K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ decay modes of the ${D}^{0}$ in $287\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ annihilation data recorded by the BABAR detector at a center-of-mass energy of 10.58 GeV. There is no evidence in the ${D}^{+}p$ spectrum of doubly charged partners. The mass and intrinsic width of the ${\ensuremath{\Lambda}}_{c}(2880{)}^{+}$ baryon and relative yield of the two baryons are also measured.

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