Heavy Mesons to Open-Charmed Tetraquark Decays

Motivated by the recent observations of T^*cs0(2870)⁰, T^*c s 0(2900)⁰ and T^*c s 0(2900)⁺⁺ open-charmed tetraquark states by LHCb, we study the decays of heavy mesons to these open-charmed tetraquark states (T) using a topological amplitude approach. We first obtain the T→ DP and $DS$ strong decay amplitudes by decomposing them into several topological amplitudes, where P is a light pseudo-scalar particle and S is a low-lying scalar particle. Subsequently, weak decay amplitudes of B→ D T, D T and B→ TP, $TS$ decays are decomposed topologically. In addition, B⁻c→ T T decays are also discussed. Using these results, modes with an unambiguous exotic interpretation in flavor are highlighted.