### Abstract

We report on determinations of [Formula Presented] resulting from studies of the branching fraction and [Formula Presented] distributions in exclusive semileptonic B decays that proceed via the [Formula Presented] transition. Our data set consists of the [Formula Presented] [Formula Presented] meson pairs collected at the [Formula Presented] resonance with the CLEO II detector. We measure [Formula Presented] and [Formula Presented] where the errors are statistical, experimental systematic, systematic due to residual form-factor uncertainties in the signal, and systematic due to residual form-factor uncertainties in the cross-feed modes, respectively. We also find [Formula Presented] consistent with what is expected from the [Formula Presented] mode and quark model symmetries. We extract [Formula Presented] using light-cone sum rules for [Formula Presented] and lattice QCD for [Formula Presented] Combining both intervals yields [Formula Presented] for [Formula Presented] and [Formula Presented] for [Formula Presented] where the errors are statistical, experimental systematic, theoretical, and ρlν form-factor shape, respectively. Our combined value from both decay modes is [Formula Presented]

Original language | English (US) |
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Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |

Volume | 68 |

Issue number | 7 |

DOIs | |

State | Published - Jan 1 2003 |

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### ASJC Scopus subject areas

- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)

### Cite this

*Physical Review D - Particles, Fields, Gravitation and Cosmology*,

*68*(7). https://doi.org/10.1103/PhysRevD.68.072003