Eur. Phys. J. A (2025) 61: 242
https://doi.org/10.1140/epja/s10050-025-01722-2

Regular Article - Theoretical Physics

Decays of the vector charmonium and bottomonium hybrids

Division of Optometry, School of Medical Services and Techniques, Dogus University, Dudullu-Ümraniye, 34775, Istanbul, Turkey

^a bbarsbay@dogus.edu.tr

Received: 31 May 2025
Accepted: 20 October 2025
Published online: 2 November 2025

Abstract

The full widths of the vector charmonium and bottomonium hybrid mesons $H_{\text{c}}$ and $H_{\text{b}}$, characterized by the quantum numbers $1^{--}$, are determined by analyzing their dominant strong decay modes: $H_{\text{c}}\to D^{+}{D}^{-}$, $D_0{\overline{D}}_0$, $D_s^{+}{D}_s^{-}$, $D_{}^{\ast +}D_{}^{\ast -}$, $D_{}^{\ast 0}\overline{D}_{}^{\ast 0}$, $D_{}^{\ast +}{D}^{-}$, $D_{}^{\ast 0}{\overline{D}}^0$, $D_s^{\ast +}{D}_s^{-}$ and $H_{\text{b}}\to B^{+}{B}^{-}$, $B_0{\overline{B}}_0$. 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 ${\mathrm{\Gamma }}_{H_{\text{c}}}=(309.6\pm 39.0)\text{MeV}$ and ${\mathrm{\Gamma }}_{H_{\text{b}}}=(78.8\pm 15.4)\text{MeV}$. 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.