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The strong OZI allowed decays of the first radial excited states B(2S) and D(2S) are studied in the instantaneous Bethe–Salpeter method, and by using these OZI allowed channels we estimate the full decay widths: ΓB0(2S)=24.4 MeV, ΓB+(2S)=23.7 MeV, ΓD0(2S)=11.3 MeV and ΓD+(2S)=11.9 MeV. We also predict the masses of them: MB0(2S)=5.777 GeV, MB+(2S)=5.774 GeV, MD0(2S)=2.390 GeV and MD+(2S)=2.393 GeV.
We analyzed the decays of B+→D¯0+DsJ+(2S) and B+→D¯0+DsJ+(1D) by naive factorization method and model dependent calculation based on the Bethe–Salpeter method, the branching ratios are Br(D¯0DsJ+(2S))=(0.72±0.12)% and Br(D¯0DsJ+(1D))=(0.027±0.007)%. The branching ratio of decay B+→D¯0DsJ+(2S)→D¯0D0K+ consists with the data of Belle Collaboration, so we conclude that the new state DsJ+(2700) is the...
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