Aubert, B. et al. (2009) Measurement of the B+→ωl+ν and B+→ηl+ν branching fractions. Physical Review D, 79 (5). 052011. ISSN 1550-7998

We present a study of the charmless semileptonic B-meson decays B+→ωℓ+ν and B+→ηℓ+ν. The analysis is based on 3.83×108 BB̅ pairs recorded at the Υ(4S) resonance with the BABAR detector. The ω mesons are reconstructed in the channel ω→π+π-π0 and the η mesons in the channels η→π+π-π0 and η→γγ. We measure the branching fractions B(B+→ωℓ+ν)=(1.14±0.16stat±0.08syst)×10-4 and B(B+→ηℓ+ν)=(0.31±0.06stat±0.08syst)×10-4.

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