Tensor hybrid mesons bgc

Abstract

Spectroscopic parameters and widths of the tensor hybrid mesons bcand bc with the structure and spin-parities P = 2-and P = 2+ are calculated with high accuracy in the QCD sum rule framework. Information on their masses = (7.214 +/- 0.075) GeV and = (7.685 +/- 0.040) GeV enable us to determine decay channels of bc and bc. The full width of the meson bc is estimated by considering the decays bc-+*0 and 0*+. The channels bc-+0, 0+, *+*0, *0*+, 0+, and *0*+ are studied to find the width of the bcstate. The widths of these processes are calculated using QCD three-point sum rule approach, which require estimation of the strong couplings at hybrid-meson-meson vertices. The results (50.8 +/- 9.8) MeV and (184.3 +/- 22.8) MeV for the full widths of the hybrid mesons bc and bc characterize them as relatively narrow and broad structures, respectively.