Study on e⁺e^-? B^(*)B¯(*) and ?(5S) ? ?(1S,2S)?⁽⁰⁾

We report the first measurement of exclusive cross sections for e⁺ e^- ? BB^¯, e⁺ e^- ? BB^¯*, and e⁺ e^-? B*B^¯* in the energy range from 10.63 GeV to 11.02 GeV. The B mesons are fully reconstructed in a large number of hadronic final states, and the three channels are distinguished using the beam-energy-constrained mass variable. For each channel, the cross section shows an oscillatory behavior, with multiple maxima and minima. The final results on ?(5S) ? ?(1S, 2S)? and ?(5S) ? ?(1S)?⁰ branching fractions are also presented. All these results are based on data collected by the Belle experiment at the KEKB asymmetric-energy e⁺ e^- collider.