Decays of the vector charmonium and bottomonium hybrids

Abstract

The full widths of the vector charmonium and bottomonium hybrid mesons $H_{\mathrm{c}}$ and $H_{\mathrm{b}}$, characterized by the quantum numbers $1^{--}$, are determined by analyzing their dominant strong decay modes: $H_{\mathrm{c}}\to D^{+}{D}^{-}$, $D_0{\overline{D}}_0$, $D_s^{+}{D}_s^{-}$ and $H_{\mathrm{b}}\to B^{+}{B}^{-}$, $B_0{\overline{B}}_0$. 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 ${\Gamma }_{H_{\mathrm{c}}}=(234.1\pm 37.4)\mathrm{MeV}$ and ${\Gamma }_{H_{\mathrm{b}}}=(78.8\pm 15.4)\mathrm{MeV}$ . 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.

Comments: 8 Pages and 3 Figures