Inclusive Semileptonic B Decays at BABAR

Technical Report · Wed Apr 03 04:00:00 EST 2002

DOI:https://doi.org/10.2172/799031· OSTI ID:799031

Langenegger, Urs ^[1]

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1. SLAC

We present measurements of the inclusive semileptonic branching fractions of charged and neutral B mesons using 20.6 fb{sup -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{sub +} = 0.103 {+-} 0.006 {+-} 0.005, neutral B mesons b{sub 0} = 0.104 {+-} 0.008 {+-} 0.005, their average b = 0.104 {+-} 0.005 {+-} 0.004, and their ratio b{sub +}/b{sub 0} = 0.99 {+-} 0.10 {+-} 0.03.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (US)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 799031
• Report Number(s): SLAC-PUB-9037
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
DECAY
ELECTRONS
SEMILEPTONIC DECAY