Observation of B0 → ωK0, B+ → ηπ+, and B+ → ηK+ and Study of Related Decays

We present measurements of branching fractions and charge asymmetries for seven B-meson decays with an η, η' or ω meson in the final state. The data sample corresponds to 89 million Bbar pairs produced from e+e- annihilation at the Υ(4S) resonance. We measure the following branching fractions in units of 10-6: B(ηπ+)=5.3 +/- 1.0 +/- 0.3, B(ηK+)=3.4 +/- 0.8 +/- 0.2, B(ηK0)=2.9 +/- 1.0 +/- 0.2 (<5.2, 90% C.L.), B(η'π+=2.7 +/- 1.2 +/- 0.3 (<4.5, 90% C.L.), B(ωπ+)=5.5 +/- 0.9 +/- 0.5, B(ωKp)=4.8 +/- 0.8 +/- 0.4, and B(ωK0)=5.9+1.6-1.3 +/- 0.5. The charge asymmetries are Ach(ηπ+)=-0.44 +/- 0.18 +/- 0.01, Ach(ηK+)=-0.52 +/- 0.24 +/- 0.01, Ach(ωπ+)=0.03 +/- 0.16 +/- 0.01 and Ach(ωK+)=-0.09 +/- 0.17 +/- 0.01