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An improved measurement of electroweak couplings frome + e −→e + e − ande + e −→μ + μ −

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Zeitschrift für Physik C Particles and Fields

Abstract

We present an analysis of electroweak leptonic couplings from high statistics experiments on Bhabha scattering and μ pair production at an energy of 34.5 GeV. The forward-backward charge asymmetry of the μ pairs was measured to be −0.098±0.023±0.005. The data were found to agree well with the standard theory of electroweak interaction giving sin2θ W =0.27±0.07. The leptonic weak couplings were determined to beg v=0.000±0.170 andg A=−0.481±0.055. The data were also used to investigate a class of composite models for leptons.

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Author information

Author notes

  1. W. Hillen

    Present address: Philips, Aachen, FRG

  2. N. Wermes

    Present address: SLAC, Stanford, CA., USA

  3. M. Wollstadt

    Present address: Lufthansa, Frankfurt, FRG

  4. H. Burkhardt

    Present address: CERN, Geneva, Switzerland

  5. Y. Eisenberg

    Present address: Weizmann Institute, Rehovot, Israel

  6. D. R. Quarrie & M. Rushton

    Present address: FNAL, Batavia, USA

  7. I. C. Brock

    Present address: Carnegie-Mellon University, Pittsburg, USA

  8. P. L. Woodworth

    Present address: Institute of Oceanographic Sciences, Bidston, Merseyside, UK

Authors and Affiliations

  1. Physikalisches Institut der RWTH, D-5100, Aachen, Federal Republic of Germany

    M. Althoff, W. Braunschweig, F. J. Kirschfink, K. Lübelsmeyer, H. -U. Martyn, G. Peise, J. Rimkus, P. Rosskamp, H. G. Sander, D. Schmitz, H. Siebke & W. Wallraff

  2. Physikalisches Institut der Universität, D-5300, Bonn, Federal Republic of Germany

    H. M. Fischer, H. Hartmann, W. Hillen, A. Jocksch, G. Knop, L. Köpke, H. Kolanoski, H. Kück, R. Wedemeyer, N. Wermes & M. Wollstadt

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

    H. Burkhardt, Y. Eisenberg, K. Gather, H. Hultschig, P. Joos, W. Koch, U. Kötz, H. Kowalski, A. Ladage, B. Lohr, D. Lüke, P. Mättig, D. Notz, J. Pyrlik, D. R. Quarrie, M. Rushton, W. Schütte, D. Trines, G. Wolf & Ch. Xiao

  4. II. Institut für Experimentalphysik der Universität, D-2000, Hamburg, Federal Republic of Germany

    R. Fohrmann, E. Hilger, T. Kracht, H. L. Krasemann, P. Leu, E. Lohrmann, D. Pandoulas, G. Poelz & B. H. Wiik

  5. Department of Physics, Imperial College, SW72BZ, London, England

    R. Beuselinck, D. M. Binnie, A. J. Campbell, P. J. Dornan, B. Foster, D. A. Garbutt, C. Jenkins, T. D. Jones, W. G. Jones, J. McCardle, J. K. Sedgbeer & W. A. T. Wan Abdullah

  6. Department of Nuclear Physics, University, OX1 3RH, Oxford, England

    K. W. Bell, M. G. Bowler, I. C. Brock, R. J. Cashmore, P. E. L. Clarke, R. Devenish, P. Grossmann, S. L. Llyod, G. L. Salmon, J. Thomas, T. R. Wyatt & C. Youngman

  7. Rutherford Appleton Laboratory, Chilton, OX11 0QX, Didcot, Oxon, England

    J. C. Hart, J. Harvey, D. K. Hasell, J. Proudfoot, D. H. Saxon & P. L. Woodworth

  8. Fachbereich Physik der Universität-Gesamthochschule, D-5900, Siegen, Federal Republic of Germany

    F. Barreiro, M. Dittmar, M. Holder & B. Neumann

  9. Weizmann Institute, Rehovot, Israel

    E. Duchovni, U. Karshon, G. Mikenberg, R. Mir, D. Revel, E. Ronat, A. Shapira & G. Yekutieli

  10. Department of Physics, University of Wisconsin, 53 706, Madison, WI, USA

    T. Barklow, A. Caldwell, M. Cherney, J. M. Izen, M. Mermikides, G. Rudolph, D. Strom, H. Venkataramania, E. Wicklund, Sau Lan Wu & G. Zobernig

Authors
  1. M. Althoff
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  2. W. Braunschweig
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  12. W. Wallraff
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  14. H. Hartmann
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  20. H. Kück
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  21. R. Wedemeyer
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  22. N. Wermes
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  23. M. Wollstadt
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  24. H. Burkhardt
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  105. G. Zobernig
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Supported by the Deutsches Bundesministerium für Forschung und Technologie

Supported by the UK Science and Engineering Research Council

Supported by the Minerva Gesellschaft für Forschung mbH

Supported by the US Department of Energy contract WY-76-C-02-0881

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TASSO Collaboration., Althoff, M., Braunschweig, W. et al. An improved measurement of electroweak couplings frome + e −→e + e − ande + e −→μ + μ − . Z. Phys. C - Particles and Fields 22, 13–21 (1984). https://doi.org/10.1007/BF01577559

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  • DOI: https://doi.org/10.1007/BF01577559

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