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 ${\bar{B}}^0\to {\mathbf{B}}_{\mathbf{c}}^{+}(\to D^{0}p)\bar{p}$, where ${\mathbf{B}}_{\mathbf{c}}$ denotes a charmed baryon state, some of the peaks can be identified with the established ${\Sigma }_c(2800{)}^{+}$, ${\Lambda }_c(2880{)}^{+}$ and ${\Lambda }_c(2940{)}^{+}$. Moreover, in order to account for the measured spectrum, it is necessary to introduce a new charmed baryon resonance with $(m,\Gamma )=(3212\pm 20,167\pm 34)$ MeV.

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