Potential of discovering ${\Xi }_{cc}^{+}$ in ${\Lambda }_b$ decays

Abstract

We propose to search for ${\Xi }_{cc}^{+}$ in the decay ${\Lambda }_b\to {\Xi }_{cc}^{+}{D}^{-}$, which serves as a tagged and reconstructible source of ${\Xi }_{cc}^{+}$, providing an experimentally clean environment for its discovery. A possible fully charged final state is $[(p{K}^{-}{K}^{-}{\pi }^{+}{)}_{{\Xi }_c^0}{\pi }^{+}{]}_{{\Xi }_{cc}^{+}}(K^{+}{\pi }^{-}{\pi }^{-}{)}_{D^{-}}$, where the subscripts indicate the parent hadron in the decay chain. We estimate the branching fraction to be $\mathcal{B}({\Lambda }_b\to {\Xi }_{cc}^{+}{D}^{-})=(5.1\pm 3.9)\times 10^{-4}$, while the fully charged final state corresponds to an effective branching fraction of order $10^{-8}$. These results indicate that LHCb has the potential to discover the ${\Xi }_{cc}^{+}$. The prospects for observing ${\Omega }_{cc}^{+}$ are also briefly discussed.

Comments: 4 pages, 1 figure