Improved Measurements of Branching Fractions and CP Asymmetries for B->omega h Decays
The Belle Collaboration
Abstract
We report improved measurements of B to pseudoscalar-vector decays containing an omega meson in the final state. These results are obtained from a data sample that contains 386 millions BBbar pairs collected at the Upsilon(4S) resonance, with the Belle detector at the KEKB asymmetric energy e+e- collider. We measure the branching fractions Br(B+/- -> omega K+/-)=(8.1+/-0.6+/-0.5)*10-6, Br(B+/- -> omega pi+/-)=(7.0+/-0.6+/-0.5)*10-6, and Br(B0 -> omega K0)=(3.9+/-0.7+/-0.4)*10-6. we also set the 90% confidence level upper limit Br(B0 -> omega pi0)<1.5*10-6. In addition, we obtain the partial rate asymmetries Acp=0.05+/-0.08+/-0.01 for B+/- -> omega K+/- and Acp=-0.03+/-0.09+/-0.02 for B+/- -> omega pi+/-.
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