Production of doubly charmed baryons in B decays

Abstract

We study the doubly charmed baryonic B decays $B\to {\Xi }_c{\Lambda }_c$ and $B\to {\Lambda }_c^{+}{\Lambda }_c^{-}K$, recently observed by BELLE. We find that the unexpected large branching ratios (BRs) could be ascribed to the final state interactions (FSIs), which are dictated by $B\to D{D}_s^{+}\to {\Xi }_c{\Lambda }_c^{+}$ and $B\to {\bar{D}}^0{D}^{0}K\to {\Lambda }_c^{+}{\Lambda }_c^{-}K$. By utilizing the same mechanism, we predict that the BRs for $B^{+}\to {\bar{\Xi }}_c^0{\Sigma }_c^{+}$ and $B^{+}\to {\Sigma }_c^{\mp }{\Lambda }_c^{\pm }{K}^{+}$ decays could be as large as $BR(B^{+}\to {\bar{\Xi }}_c^0{\Lambda }_c^{+})$ and $10^{-4}$, respectively. In addition, extending the FSIs to the processes associated with the creation of the $s\bar{s}$ pair, $BR(B^{+}\to {\bar{\Omega }}_c{\Xi }_c^{+})$ at percent level is achievable.

Comments: 14 pages, 6 figures, version accepted for publication