Heavy scalar molecule Bc plus Bc-

Abstract

Mass and full width of the heavy scalar molecule M composed of the mesons B c and B-c are calculated in the QCD sum rule framework. To find its mass and current coupling, we apply the two-point sum rule method. The width of the hadronic molecule M = BC B-c is evaluated by taking into account its dissociation to eta c eta b; J/psi & upsih;, and BC B-c mesons. Decays into D and B meson pairs with appropriate charges and quantum numbers triggered by bb and cc annihilations to light quark-antiquarks are also included in the analyses. Because the partial widths of M molecule's decay channels depend on the strong couplings at M-meson-meson vertices, we estimate them by invoking tools of the three-point sum rule method. Our predictions m = (12725 + 85) MeV and Gamma[M] = (155 + 23) MeV for the parameters of the molecule M provide useful information for experimental studies of numerous heavy resonances.