Abstract
We review the studies of transitions and decays of bottomonium states from the e+ e- data recorded by the Belle detector at various Upsilon-resonances. We also report a recent study of the branching fractions of χ_{bJ}(1P) to 41 hadronic final states in the Y(2S) data sample. In the same study, a 90% confidence-level upper limit is set for the first time on the width of χ_{b0}(1P) at Γ_{total} < 2.4 MeV.
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