Tensor hybrid mesons b‾gc
Creators
- 1. Institute for Physical Problems, Baku State University, Az–1148 Baku, Azerbaijan
- 2. Department of Physics, University of Tehran, North Karegar Avenue, Tehran 14395-547, Iran
- 3. Department of Physics Engineering, Istanbul Medeniyet University, 34700 Istanbul, Türkiye
Description
Spectroscopic parameters and widths of the tensor hybrid mesons Hbc and H˜bc with the structure b‾gc and spin-parities JP=2− and JP=2+ are calculated with high accuracy in the QCD sum rule framework. Information on their masses m=(7.214±0.075)GeV and m˜=(7.685±0.040)GeV enable us to determine decay channels of Hbc and H˜bc. The full width of the meson Hbc is estimated by considering the decays Hbc→D+B‾⁎0 and D0B⁎+. The channels H˜bc→B+D0, B0D+, B⁎+D⁎0, B⁎0D⁎+, Bs0Ds+, and Bs⁎0Ds⁎+ are studied to find the width of the H˜bc state. 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 Hbc and H˜bc characterize them as relatively narrow and broad structures, respectively.
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