Abstract
We report on the first observation of B 0 → D 1 (2430) 0 ω , B 0 → D 1 (2420) 0 ω and B 0 → D 2 * (2460) 0 ω decays and determination of their rates as well as the fractions of longitudinal polarizations of the ω for these decays. We also discuss improved measurements of the B → DD * s 0 (2317) branching fractions with a search for isospin partners of the D * s 0(2317) + state, Z 0 and Z ++ . These measurements use a data sample containing 772 million BB events collected at the ϒ(4 S ) resonance with the Belle detector at the KEKB asymmetric-energy e + e − collider.
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