This title appears in the Scientific Report :
2013
Please use the identifier:
http://hdl.handle.net/2128/5520 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevD.88.072006 in citations.
Measurement of the B+ --> omega l+ nu branching fraction with semileptonically tagged B mesons
Measurement of the B+ --> omega l+ nu branching fraction with semileptonically tagged B mesons
We report a measurement of the branching fraction of the exclusive charmless semileptonic decay B+ --> omega l+ nu, where l is either an electron or a muon. We use samples of B+ mesons tagged by a reconstructed charmed semileptonic decay of the other B meson in the event. The measurement is based...
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Please use the identifier: http://dx.doi.org/10.1103/PhysRevD.88.072006 in citations.
We report a measurement of the branching fraction of the exclusive charmless semileptonic decay B+ --> omega l+ nu, where l is either an electron or a muon. We use samples of B+ mesons tagged by a reconstructed charmed semileptonic decay of the other B meson in the event. The measurement is based on a dataset of 426.1 fb-1 of e+e- collisions at a center-of-mass energy of 10.58 GeV recorded with the BABAR detector at the PEP-II asymmetric-energy e+e- storage rings. We measure a branching fraction of BF(B+ --> omega l+ nu) = (1.35 +/- 0.21 +/- 0.11) x 10(-4), where the uncertainties are statistical and systematic, respectively. We also present measurements of the partial branching fractions in three bins of q2, the invariant-mass squared of the lepton-neutrino system, and we compare them to theoretical predictions of the form factors. |