Inclusive Semileptonic B Decays at BABAR
Urs Langenegger (for the BABAR Collaboration)
TL;DR
This paper reports measurements of inclusive semileptonic branching fractions of charged and neutral B mesons using data from the BABAR detector, providing precise values and ratios that improve understanding of B meson decays.
Contribution
The study presents the first precise measurements of inclusive semileptonic branching fractions for charged and neutral B mesons at BABAR, utilizing a novel tagging method.
Findings
Charged B mesons branching fraction: 0.103±0.006±0.005
Neutral B mesons branching fraction: 0.104±0.008±0.005
Branching ratio b+/b0: 0.99±0.10±0.03
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 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.
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