B meson decays to η(′)K*, η(′)ρ, η(′)π0, ωπ0, and φπ0

Abstract

We present measurements of the branching fractions and charge asymmetries (where appropriate) of two-body B decays to η(′)K*, η(′)ρ, η(′)π0, ωπ0, and φπ0. The data were recorded with the BABAR detector at PEP-II and correspond to 89×106 BB¯ pairs produced in e+e− annihilation through the Υ(4S) resonance. We find significant signals for two decay modes and measure the branching fractions B(B+→ηK*+)=(25.6±4.0±2.4)×10−6 and B(B0→ηK*0)=(18.6±2.3±1.2)×10−6, where the first error is statistical and the second systematic. We also find evidence with significance 3.5σ for a third decay mode and measure B(B+→ηρ+)=(9.2±3.4±1.0)×10−6. For other channels, we set 90% C.L. upper limits of B(B0→ηρ0)<1.5×10−6, B(B+→η′K*+)<14×10−6, B(B0→η′K*0)<7.6×10−6, B(B+→η′ρ+)<22×10−6, B(B0→η′ρ0)<4.3×10−6, B(B0→ηπ0)<2.5×10−6, B(B0→η′π0)<3.7×10−6, B(B0→ωπ0)<1.2×10−6, and B(B0→φπ0)<1.0×10−6. For self-flavor-tagging modes with significant signals, the time-integrated charge asymmetries are Ach(ηK*+)=+0.13±0.14±0.02 and Ach(ηK*0)=+0.02±0.11±0.02. Received 17 March 2004DOI:https://doi.org/10.1103/PhysRevD.70.032006©2004 American Physical Society