Observation of a Charmed Baryon Decaying to D0 p at a Mass Near 2.94 GeV/c2

Abstract

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

7 pages, 3 figures, submitted to Physical Review Letters

References in corpus (1)

• Charmed baryons in a relativistic quark model

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