Scalar hybrid meson bgc

The scalar hybrid meson Hbc, containing both heavy b and c quarks, represents an intriguing exotic state in QCD. In this article, we investigate its strong decay properties using three-point QCD sum rules. We focus on the two leading decay channels, Hbc → B+ D0 and Hbc → B0 D+, which are expected to dominate the decay dynamics. The B and D mesons produced in these decays each consist of one heavy and one light quark. The strong coupling constants at the corresponding vertices are extracted, and the partial decay widths of both channels are found to be approximately equal, around (38.54 ± 9.80) MeV, with a total width of (77.08 ± 13.86) MeV for these dominant decays. Borel transformation and continuum subtraction are applied to ensure the convergence of the sum rules and to suppress higher resonance contributions. These results indicate that the two channels provide a substantial contribution to the decay of the Hbc meson. Our findings provide a reliable quantitative description of its decay dynamics, shed light on the internal structure and interactions of scalar hybrid mesons, and advance the theoretical understanding of heavy hybrid meson spectroscopy. Furthermore, the results offer valuable guidance for future experimental searches at facilities such as LHCb and Belle II.