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Title: Measurement of the Branching Fractions of ¯¯¯B→D**ℓ−¯νℓ Decays in Events Tagged by a Fully Reconstructed B Meson
Author: Garra Ticó, Jordi
Graugés Pous, Eugeni
BABAR Collaboration
Keywords: Física de partícules
Particle physics
Issue Date: 23-Dec-2008
Publisher: American Physical Society
Abstract: We report a measurement of the branching fractions of ¯¯¯ B → D ** ℓ − ¯ ν ℓ decays based on 417     fb − 1 of data collected at the Υ ( 4 S ) resonance with the BABAR detector at the PEP-II e + e − storage rings. Events are selected by fully reconstructing one of the B mesons in a hadronic decay mode. A fit to the invariant mass differences m ( D ( * ) π ) − m ( D ( * ) ) is performed to extract the signal yields of the different D ** states. We observe the ¯¯¯ B → D ** ℓ − ¯ ν ℓ decay modes corresponding to the four D ** states predicted by heavy quark symmetry with a significance greater than 5 standard deviations including systematic uncertainties.
Note: Reproducció del document publicat a:
It is part of: Physical Review Letters, 2008, vol. 101, num. 26, p. 261802
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ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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