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Measurements of the semileptonic decays B[overbar]→Dℓν[overbar] and B[overbar]→D^*ℓν[overbar] using a global fit to DXℓν[overbar] final states

Aubert, B. and Cheng, C. H. and Doll, D. A. and Echenard, B. and Fang, F. and Hitlin, D. G. and Narsky, I. and Piatenko, T. and Porter, F. C. (2009) Measurements of the semileptonic decays B[overbar]→Dℓν[overbar] and B[overbar]→D^*ℓν[overbar] using a global fit to DXℓν[overbar] final states. Physical Review D, 79 (1). Art. No. 012002. ISSN 2470-0010. https://resolver.caltech.edu/CaltechAUTHORS:20100720-135107708

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Abstract

Semileptonic B[overbar] decays to DXℓν[overbar](ℓ=e or μ) are selected by reconstructing D^0ℓ and D^+ℓ combinations from a sample of 230×10^6 Υ(4S)→BB[overbar] decays recorded with the BABAR detector at the PEP-II e^+e^- collider at SLAC. A global fit to these samples in a three-dimensional space of kinematic variables is used to determine the branching fractions B(B^-→D^0ℓν[overbar])=(2.34±0.03±0.13)% and B(B^-→D^(*0)ℓν[overbar])=(5.40±0.02±0.21)% where the errors are statistical and systematic, respectively. The fit also determines form-factor parameters in a parametrization based on heavy quark effective theory, resulting in ρ_D^2=1.20±0.04±0.07 for B[overbar]→Dℓν[overbar] and ρ_(D*)^2=1.22±0.02±0.07 for B[overbar]→D^*ℓν[overbar]. These values are used to obtain the product of the Cabibbo-Kobayashi-Maskawa matrix element |V_(cb)| times the form factor at the zero recoil point for both B[overbar]→Dℓν[overbar] decays, G(1)|V_(cb)|=(43.1±0.8±2.3)×10^(-3), and for B[overbar]→D^*ℓν[overbar] decays, F(1)|V_(cb)|=(35.9±0.2±1.2)×10^(-3).


Item Type:Article
Related URLs:
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http://dx.doi.org/10.1103/PhysRevD.79.012002DOIArticle
http://prd.aps.org/abstract/PRD/v79/i1/e012002PublisherArticle
Additional Information:© 2009 The American Physical Society. Received 8 September 2008; published 15 January 2009. We are grateful for the extraordinary contributions of our PEP-II colleagues in achieving the excellent luminosity and machine conditions that have made this work possible. The success of this project also relies critically on the expertise and dedication of the computing organizations that support BABAR. The collaborating institutions wish to thank SLAC for its support and the kind hospitality extended to them. This work is supported by the U.S. Department of Energy and National Science Foundation, the Natural Sciences and Engineering Research Council (Canada), the Commissariat à l’Energie Atomique and Institut National de Physique Nucléaire et de Physique des Particules (France), the Bundesministerium für Bildung und Forschung and Deutsche Forschungsgemeinschaft (Germany), the Istituto Nazionale di Fisica Nucleare (Italy), the Foundation for Fundamental Research on Matter (The Netherlands), the Research Council of Norway, the Ministry of Education and Science of the Russian Federation, Ministerio de Educación y Ciencia (Spain), and the Science and Technology Facilities Council (United Kingdom). Individuals have received support from the Marie-Curie IEF program (European Union) and the A. P. Sloan Foundation.
Funders:
Funding AgencyGrant Number
U.S. Department of EnergyUNSPECIFIED
NSFUNSPECIFIED
Natural Sciences and Engineering Research Council (Canada)UNSPECIFIED
Commissariat à l’Energie Atomique and Institut National de Physique Nucléaire et de Physique des Particules (France)UNSPECIFIED
Bundesministerium für Bildung und Forschung and Deutsche Forschungsgemeinschaft (Germany)UNSPECIFIED
Istituto Nazionale di Fisica Nucleare (Italy)UNSPECIFIED
Foundation for Fundamental Research on Matter (The Netherlands)UNSPECIFIED
Research Council of NorwayUNSPECIFIED
Ministry of Education and Science of the Russian FederationUNSPECIFIED
Ministerio de Educación y Ciencia (Spain)UNSPECIFIED
Science and Technology Facilities Council (United Kingdom)UNSPECIFIED
Marie-Curie IEF program (European Union)UNSPECIFIED
A. P. Sloan FoundationUNSPECIFIED
Issue or Number:1
Classification Code:PACS: 13.25.Hw, 12.15.Hh, 11.30.Er
Record Number:CaltechAUTHORS:20100720-135107708
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20100720-135107708
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:19132
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:23 Jul 2010 04:16
Last Modified:03 Oct 2019 01:52

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