Possibly New Charmed Baryon States from $\bar B^0\to p\bar p D^{0}$ Decay

Abstract

We examine the invariant mass spectrum of $D^{0}p$ in $\bar B^0\to p\bar p D^{0}$ decay measured by BABAR and find that through the 2-step processes of $\bar B^0\to {\bf B_c^+}(\to D^{0} p)\bar p$, where ${\bf B_c}$ denotes a charmed baryon state, some of the peaks can be identified with the established $Σ_c(2800)^+$, $Λ_c(2880)^+$ and $Λ_c(2940)^+$. Moreover, in order to account for the measured spectrum, it is necessary to introduce a new charmed baryon resonance with $(m,\,Γ)=(3212\pm 20,\,167\pm 34)$ MeV.

8 pages, 1 figure, title changed and discussions updated, version accepted for publication in Phys. Rev. D