The doubly charmed baryon $\Xi_{ cc}^{ ++}$ was recently observed by LHCb via the decay processes of $\Xi_{ cc}^{ ++}\to \Lambda_c^+ K^-\pi^+\pi^+$ and $\Xi_c^+\pi^+$. These discovery channels were successfully predicted in the framework that the short-distance contributions are calculated under the factorization hypothesis and the long-distance contributions are estimated using the rescattering mechanism for the final-state-interaction effects. In this paper, we illustrate the above framework in details by systematic studies on the two-body baryonic decays $\mathcal{ B}_{ cc}\to\mathcal{ B}_{ c}P$ involving the doubly charmed baryons $\mathcal{ B}_{ cc}=(\Xi_{ cc}^{ ++} , \Xi_{ cc}^+,\Omega_{ cc}^+)$, the singly charmed baryons $\mathcal{ B}_{ c}=(\mathcal{ B}_{ \bar{ 3}}, \mathcal{ B}_{ 6})$ and the light pseudoscalar mesons $P=(\pi,K,\eta_{ 1,8})$.
Categories: hep-ph hep-ex