2001•Proceedings of International Europhysics Conference on High Energy Physics — PoS(hep2001)Open access
Inclusive semileptonic B decays at BaBar
U. Langenegger
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Abstract
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 Υ (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 b 0 = 0.104 ± 0.008 ± 0.005, their average b = 0.104 ± 0.005 ± 0.004, and their ratio b + /b 0 = 0.99 ± 0.10 ± 0.03.
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