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Observation of the exclusive decayB→evD * and search forB→evπ 0

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Zeitschrift für Physik C Particles and Fields

Abstract

The Crystal Ball detector at thee + e − storage ring DORIS II has been used to analyze exclusive semileptonic decays ofB mesons produced at γ(4S) energies. The decayB→evD * has been observed with a branching ratio of (7.0±1.8±1.4)% using theπ°D decay mode of theD *. In addition we have searched for the exclusive semileptonic decayB ±→e ± vπ 0. We find an upper limit onB ±→e ± vπ 0 of 0.22% at the 90% CL.

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Authors and Affiliations

  1. California Institute of Technology, 91125, Pasadena, CA, USA

    C. Peck & F. C. Porter

  2. University of California at Santa Cruz, 95064, Santa Cruz, CA, USA

    M. Cavalli-Sforza, D. Coyne & D. A. Williams

  3. Cracow Institute of Nuclear Physics, PL-30055, Cracow, Poland

    Z. Jakubowski, T. Lesiak, B. Muryn & G. Nowak

  4. Deutsches Elektronen Synchrotron DESY, D-2000, Hamburg, Federal Republic of Germany

    H. W. Bartels, J. K. Bienlein, K. Brockmüller, K. Karch, W. Koch, H. Marsiske, W. Maschmann, H. Meyer, T. Skwarnicki, A. Voigt & K. Wachs

  5. Universität Erlangen-Nürnberg, D-8520, Erlangen, Federal Republic of Germany

    G. Folger, G. Glaser, M. Kobel, B. Lurz, J. Schütte, U. Volland & H. Wegener

  6. INFN and University of Firenze, I-50125, Firenze, Italy

    A. Bizzeti, A. Cartacci, A. Compagnucci, G. Conforto, F. H. Heimlich, G. Landi, B. Monteleoni & P. G. Pelfer

  7. I. Institut für Experimentalphysik, Universität Hamburg, D-2000, Hamburg, Federal Republic of Germany

    C. Bieler, K. Graaf, F. H. Heimlich, F. H. Heinsius, T. Kiel, S. Krüger, R. Lekebusch, W. Maschmann, D. Sievers, V. Stock & U. Strohbusch

  8. Harvard University, 02138, Cambridge, MA, USA

    D. Antreasyan, J. Irion, P. McBride, K. Strauch & D. A. Williams

  9. University of Nijmegen and NIKHEF, NL-6525 ED, Nijmegen, The Netherlands

    H. Janssen, A. C. König, W. J. Metzger, M. Reidenbach, J. Schotanus, R. T. Van de Walle & W. Walk

  10. Department of Physics, HEPL, and Stanford Linear Accelerator Center, Stanford University, 94305, Stanford, CA, USA

    E. D. Bloom, R. Clare, S. Cooper, K. Fairfield, A. Fridman, D. Gelphman, G. Godfrey, R. Hofstadter, I. Kirkbride, S. Leffler, A. M. Litke, S. Lowe, H. Marsiske, B. Niczyporuk, A. Schwarz, J. Tompkins, B. van Uitert & K. Wacker

  11. Universität Würzburg, D-8700, Würzburg, Federal Republic of Germany

    K. Karch, S. Keh, H. Kilian, K. Königsmann, M. Scheer & P. Schmitt

  12. DPHPE, Centre d'Etudes Nucléaires de Saclay, F-91191, Gif sur Yvette, France

    A. Fridman

  13. CERN, CH-1211, Genève 23, Switzerland

    K. Königsmann

  14. Institute of Physics and Nuclear Techniques, AGH, PL-30055, Cracow, Poland

    B. Muryn

Authors
  1. D. Antreasyan
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  2. H. W. Bartels
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  3. C. Bieler
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  4. J. K. Bienlein
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  6. E. D. Bloom
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  9. M. Cavalli-Sforza
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  10. R. Clare
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  11. A. Compagnucci
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  12. G. Conforto
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  13. S. Cooper
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  14. D. Coyne
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  15. K. Fairfield
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  16. G. Folger
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  30. T. Kiel
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  32. I. Kirkbride
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  33. M. Kobel
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  76. H. Wegener
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  77. D. A. Williams
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Consortia

Crystal Ball Collaboration

Additional information

Supported by the U.S. Department of Energy, contract No. DE-AC03-81ER40050 and by the National Science Foundation, grant No. PHY75-22980

Supported by the National Science Foundation, grant No. PHY85-12145

Supported by the German Bundesministerium für Forschung und Technologie, contract No. 054 ER 12P(5)

Supported by the German Bundesministerium für Forschung und Technologie, contract No. 054 HH 11P(7) and by the Deutsche Forschungsgemeinschaft

Supported by the U.S. Department of Energy, contract No. DE-AC02-76ER03064

Supported by FOM-ZWO

Supported by the U.S. Department of Energy, contract No. DE-AC03-76SF00326 and by the National Science Foundation, grant No. PHY81-07396

Supported by the U.S. Department of Energy, contract No. DE-AC03-76SF00515

Supported by the German Bundesministerium für Forschung und Technologie, contract No. 054 WU 11P(1)

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Crystal Ball Collaboration., Antreasyan, D., Bartels, H.W. et al. Observation of the exclusive decayB→evD * and search forB→evπ 0 . Z. Phys. C - Particles and Fields 48, 553–559 (1990). https://doi.org/10.1007/BF01614688

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  • DOI: https://doi.org/10.1007/BF01614688

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