Decays of the vector charmonium and bottomonium hybrids

The full widths of the vector charmonium and bottomonium hybrid mesons Hc and Hb, characterized by the quantum numbers 1⁻⁻, are determined by analyzing their dominant strong decay modes: Hc → D⁺D⁻, D₀D̄₀, Dₛ⁺Dₛ⁻ and Hb → B⁺B⁻, B₀B̄ ₀. To evaluate the partial widths of these channels, we employ the QCD three-point sum rule approach, which provides a reliable method for extracting the strong coupling constants at the relevant hybrid-meson-meson interaction vertices. Based on this analysis, the full widths of these hybrid quarkonia are found to be Γ _Hc =(234.1± 37.4)~ MeV and Γ _Hb =(78.8± 15.4)~MeV . These results are expected to facilitate the interpretation of future experimental data concerning the spectroscopy and decay patterns of exotic charmonium- and bottomonium-like hybrid mesons.