Potential of discovering $\hat{I}{ž}_{cc}^{+}$ in $\hat{I}{›}_b$ decays

Abstract

We propose to search for $\hat{I}{ž}_{cc}^{+}$ in the decay $\hat{I}{›}_b\to \hat{I}{ž}_{cc}^{+}{D}^{-}$, which serves as a tagged and reconstructible source of $\hat{I}{ž}_{cc}^{+}$, providing an experimentally clean environment for its discovery. A possible fully charged final state is $[(p{K}^{-}{K}^{-}\ddot{I}{€}^{+}{)}_{\hat{I}{ž}_c^0}\ddot{I}{€}^{+}{]}_{\hat{I}{ž}_{cc}^{+}}(K^{+}\ddot{I}{€}^{-}\ddot{I}{€}^{-}{)}_{D^{-}}$, where the subscripts indicate the parent hadron in the decay chain. We estimate the branching fraction to be $\mathcal{B}(\hat{I}{›}_b\to \hat{I}{ž}_{cc}^{+}{D}^{-})=(5.1\pm 3.9)\times 10^{-4}$, 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 $\hat{I}{ž}_{cc}^{+}$. The prospects for observing $\hat{I}{\text{c◯}}_{cc}^{+}$ are also briefly discussed.

4 pages, 1 figure