Measurement of Semileptonic B Decays into Orbitally Excited Charmed Mesons

Measurement of Semileptonic B Decays into Orbitally Excited Charmed Mesons

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...

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Bibliographic Details
Main Authors: Zhao, M. (Contributor), Yamamoto, R. K. (Contributor), Taylor, Frank E. (Contributor), Spitznagel, M. (Contributor), Sciolla, Gabriella (Contributor), Dujmic, Denis (Contributor), Cowan, Ray Franklin (Contributor), Fisher, Peter H. (Contributor)
Other Authors: Massachusetts Institute of Technology. Department of Physics (Contributor), Massachusetts Institute of Technology. Laboratory for Nuclear Science (Contributor)
Format: Article
Language:English
Published: American Physical Society, 2010-06-03T16:28:04Z.
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Summary: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.
Science and Technology Facilities Council, United Kingdom
MEC (Spain)
Ministry of Education and Science of the Russian Federation
Norges forskningsråd
FOM of the Netherlands
Istituto Nazionale di Fisica Nucleare of Italy
Institut National de Physique Nucleaire et Physique des Particules/CNRS
Deutsche Forschungsgemeinschaft
Bundesministerium für Bildung und Forschung, Germany
Commissariat à l'Energie Atomique (France)
Natural Sciences and Engineering Research Council of Canada
National Science Foundation
United States Department of Energy

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