Study Of Inclusive Semileptonic B Meson Decays PDF Download

We present measurements of the inclusive semileptonic branching fractions of charged and neutral B mesons using 20.6 fb−1 of data measured at the [Upsilon](4S) with the BABAR detector. Events are tagged with a fully reconstructed hadronic decay of a B meson. The correlation between the flavor of the tag B meson and the electron charge allows the separation of prompt semileptonic B decays and cascade semileptonic charm decays. We obtain the preliminary inclusive semileptonic branching fraction of charged B mesons b+ = 0.103 ± 0.006 ± 0.005, neutral B mesons b0 = 0.104 ± 0.008 ± 0.005, their average b = 0.104 ± 0.005 ± 0.004, and their ratio b+/b0 = 0.99 ± 0.10 ± 0.03.