Measurement of the B+ -> omega l(+) v and B+ -> eta l(+) v branching fractions

2009
We present a study of the charmless semileptonic B-mesondecays B+ -> omegal(+) v and B+ -> eta l(+) v. The analysis is based on 3.83 x 10(8) B (B) over bar B pairs recorded at the Gamma(4S) resonance with the BABAR detector. The omega mesonsare reconstructed in the channel omega-> pi(+) pi(-) pi(0) and the eta mesonsin the channels eta -> pi(+) pi(-) pi(0) and eta -> gamma gamma. We measure the branching fractionsB(B+ -> omegal(+) v) = (1.14 +/- 0.16( stat) +/- 0.08(syst)) x 10(-4) and B(B+ -> eta l(+) v) = (0.31 +/- 0.06( stat) +/- 0.08(syst)) x 10(-4).
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