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 89×10^6 BB̅ pairs produced from e+e- annihilation at the Υ(4S) resonance. We measure the following branching fractions in units of 10-6: B(B+→ηπ+)=5.3±1.0±0.3, B(B+→ηK+)=3.4±0.8±0.2, B(B0→ηK0)=2.9±1.0±0.2 (<5.2, 90% C.L.), B(B+→η′π+)=2.7±1.2±0.3 (<4.5, 90% C.L.), B(B+→ωπ+)=5.5±0.9±0.5, B(B+→ωK+)=4.8±0.8±0.4, and B(B0→ωK0)=5.9-1.3+1.6±0.5. The charge asymmetries are Ach(B+→ηπ+)=-0.44±0.18±0.01, Ach(B+→ηK+)=-0.52±0.24±0.01, Ach(B+→ωπ+)=0.03±0.16±0.01, and Ach(B+→ωK+)=-0.09±0.17±0.01.
Observation of B0→ωK0, B+→ηπ+, and B+→ηK+ and Study of Related Decays
MARGONI, MARTINO;SIMONETTO, FRANCO;STROILI, ROBERTO;VOCI, CESARE;SIMI, GABRIELE;
2004
Abstract
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 89×10^6 BB̅ pairs produced from e+e- annihilation at the Υ(4S) resonance. We measure the following branching fractions in units of 10-6: B(B+→ηπ+)=5.3±1.0±0.3, B(B+→ηK+)=3.4±0.8±0.2, B(B0→ηK0)=2.9±1.0±0.2 (<5.2, 90% C.L.), B(B+→η′π+)=2.7±1.2±0.3 (<4.5, 90% C.L.), B(B+→ωπ+)=5.5±0.9±0.5, B(B+→ωK+)=4.8±0.8±0.4, and B(B0→ωK0)=5.9-1.3+1.6±0.5. The charge asymmetries are Ach(B+→ηπ+)=-0.44±0.18±0.01, Ach(B+→ηK+)=-0.52±0.24±0.01, Ach(B+→ωπ+)=0.03±0.16±0.01, and Ach(B+→ωK+)=-0.09±0.17±0.01.
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