Measurement of Semileptonic B Decays into Orbitally Excited Charmed Mesons
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Aubert-2009-Measurement of Semil.pdf
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Author(s)
Zhao, M.
Yamamoto, R. K.
Sciolla, Gabriella
Dujmic, Denis
Taylor, Frank E
Spitznagel, Michael A
Cowan, Ray F
Fisher, Peter H
Date Issued
July 2009
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
BABAR Collaboration et al. “Measurement of Semileptonic B Decays into Orbitally Excited Charmed Mesons.” Physical Review Letters 103.5 (2009): 051803. © 2009 American Physical Society.
Version
Final published version
Abstract
We present a study of B decays into semileptonic final states containing charged and neutral D1(2420) and D2*(2460). The analysis is based on a data sample of 208 fb-1 collected at the Υ(4S) resonance with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. With a simultaneous fit to four different decay chains, the semileptonic branching fractions are extracted from measurements of the mass difference Δm=m(D**)-m(D) distributions. Product branching fractions are determined to be B(B+-->D10ℓ+νℓ)×B(D10-->D*+pi-)=(2.97±0.17±0.17)×10[superscript -3], B(B+-->D2*0ℓ+νℓ)×B(D2*0→D(*)+pi-)=(2.29±0.23±0.21)×10[superscript -3], B(B0-->D1-ℓ+νℓ)×B(D1--->D*0pi-)=(2.78±0.24±0.25)×10[superscript -3] and B(B0-->D2*-ℓ+νℓ)×B(D2*- -->D(*)0pi-)=(1.77±0.26±0.11)×10[superscript -3]. In addition we measure the branching ratio Gamma(D2*-->Dpi-)/Gamma(D2*-->D(*)pi-)=0.62±0.03±0.02.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.103.051803
