Hidden charm-bottom structures bcbc: Axial-vector case

Abstract

Mass and width of a hidden charm-bottom axial-vector structure containing quarks are calculated in QCD sum rule framework. It is treated as a diquark-antidiquark state built of scalar diquark and axial-vector antidiquark components. The mass of is computed using the two-point sum rule method. The width of this particle is evaluated by considering eight decay modes: The decays to /, Upsilon(1), - *+, and +*- are dissociation processes, in which all initial quarks are distributed between the final-state particles. The decays to and mesons with appropriate charges and spin-parities are channels generated due to the annihilations of and quarks from . Partial widths for all of these processes are obtained by employing the three-point sum rule approach necessary to find the strong couplings at relevant tetraquark-meson-meson vertices. Our results for the mass = (12715 +/- 90) MeV and width Gamma[] = (140 +/- 13) MeV of the tetraquark , as well as its numerous decay channels explored in this article are useful for ongoing and future experimental investigations of fully heavy resonances.