Analysis of the strong vertices of hadronic molecules DK, D^*K, DK^* and their bottom analogs

In this work, we analyze the strong vertices of hadronic molecules DK , D^*K D ∗ K , DK^* D K ∗ and their bottom analogs within the framework of three-point QCD sum rules. The contribution of interpolating currents coupling to low spin particles is considered in the phenomenological side, and the vacuum condensates q̄q , gₛ²GG , q̄gₛσ Gq , gₛ³GGG , q̄q ² q ¯ q , g s 2 G G , q ¯ g s σ G q , g s 3 G G G , q ¯ q 2 are included in the QCD side. As an application of strong coupling constants, we also obtain the partial decay widths of these states, where Γ _TDK→ Dₛπ =12.4-2.7+3.2 Γ T DK → D s π = 12 . 4 - 2.7 + 3.2 KeV, Γ _TD^*K→ Dₛ^*π =28.5-4.6+5.2 Γ T D ∗ K → D s ∗ π = 28 . 5 - 4.6 + 5.2 KeV, Γ _TBK→ BK=101₋₂₁⁺³⁶ <mml:math xmlns:mml="http://www.w3.org/19