We present measurements of branching fractions and charge asymmetries for six B-meson decay modes with an η or η′ meson in the final state. The data sample corresponds to 232×10^6 BB̅ pairs collected with the BABAR detector at the PEP-II asymmetric-energy e+e- B Factory at SLAC. We measure the branching fractions (in units of 10-6): B(B+→ηπ+)=5.1±0.6±0.3, B(B+→ηK+)=3.3±0.6±0.3, B(B0→ηK0)=1.5±0.7±0.1 (<2.5 at 90% C.L.), B(B+→ηρ+)=8.4±1.9±1.1, B(B0→ηω)=1.0±0.5±0.2 (<1.9 at 90% C.L.), and B(B+→η′π+)=4.0±0.8±0.4, where the first uncertainty is statistical and second systematic. For the charged modes we also determine the charge asymmetries, all found to be compatible with zero.
Measurement of Branching Fractions and Charge Asymmetries in B+ Decays to ηπ+, ηK+, ηρ+, and η′π+, and Search for B0 Decays to ηK0 and ηω
MARGONI, MARTINO;SIMONETTO, FRANCO;STROILI, ROBERTO;VOCI, CESARE;SIMI, GABRIELE;
2005
Abstract
We present measurements of branching fractions and charge asymmetries for six B-meson decay modes with an η or η′ meson in the final state. The data sample corresponds to 232×10^6 BB̅ pairs collected with the BABAR detector at the PEP-II asymmetric-energy e+e- B Factory at SLAC. We measure the branching fractions (in units of 10-6): B(B+→ηπ+)=5.1±0.6±0.3, B(B+→ηK+)=3.3±0.6±0.3, B(B0→ηK0)=1.5±0.7±0.1 (<2.5 at 90% C.L.), B(B+→ηρ+)=8.4±1.9±1.1, B(B0→ηω)=1.0±0.5±0.2 (<1.9 at 90% C.L.), and B(B+→η′π+)=4.0±0.8±0.4, where the first uncertainty is statistical and second systematic. For the charged modes we also determine the charge asymmetries, all found to be compatible with zero.Pubblicazioni consigliate
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