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Measurement of the processese + e −→e + e − ande + e −→γγ at PETRA

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Zeitschrift für Physik C Particles and Fields

Abstract

Cross sections for the reactionse + e −→e + e − (Bhabha scattering) ande + e −→γγ are measured for center-of-mass (c.m.) energies\(\sqrt s \) between 12.0 and 34.6 GeV. The results agree with the predictions of Quantum Electrodynamics (QED) and the cut-off parameters are determined. From Bhabha scattering at the highest energy,\(\left\langle {\sqrt s } \right\rangle = 34.6 GeV\), the 1 δ limits 0.12<sin2 ϑ w <0.38 are obtained for the weak mixing angle. The higher order (α3) QED processese + e −→e + e −γ ande + e −→γγγ are also studied and are found to agree with the α3 QED predictions. A search for excited electrons is carried out by investigating the (e ±γ) invariant mass distribution in the reactione + e −→e + e −γ.

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Author notes

  1. C. Yanagisawa

    Present address: Rutherford Appleton Laboratory, Chilton, England

  2. R. Eichler

    Present address: Labor f. Hochenergiephysik der ETH-Zürich, Villigen, Switzerland

  3. E. Elsen

    Present address: SLAC, California, USA

  4. A. Bell

    Present address: British Petroleum, London, England

  5. Y. Watanabe

    Present address: KEK, Oho-machi Isukuba-gun, Ibaraki-ken, Japan

Authors and Affiliations

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

    W. Bartel, L. Becker, C. Bowdery, D. Cords, R. Eichler, R. Felst, D. Haidt, H. Krehbiel, B. Naroska, J. Olsson, P. Steffen & P. Warming

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

    G. Dietrich, E. Elsen, G. Heinzelmann, H. Kado, K. Meier, A. Petersen, U. Schneekloth & G. Weber

  3. Physikalisches Institut der Universität Heidelberg, D-6900, Heidelberg, Federal Republic of Germany

    S. Bethke, A. Dieckmann, J. Heintze, K. H. Hellenbrand, R. D. Heuer, S. Komamiya, J. von Krogh, P. Lennert, H. Matsumura, H. Rieseberg & A. Wagner (Heisenberg Foundation Fellow)

  4. University of Lancaster, Lancaster, England

    A. Bell, A. Finch, F. Foster, G. Hughes, T. Nozaki & H. Wriedt

  5. University of Manchester, M139PL, Manchester, England

    J. Allison, A. H. Ball, G. Bamford, R. Barlow, I. P. Duerdoth, I. Glendinning, F. K. Loebinger, A. A. Macbeth, H. McCann, H. E. Mills, P. G. Murphy, P. Rowe & K. Stephens

  6. Rutherford Appleton Laboratory, Chilton, England

    D. Clarke, R. Marshall, G. F. Pearce & J. B. Whittaker

  7. Lab. of Int. Coll. on Elementary Particle Physics, and Department of Physics, University of Tokyo, Tokyo, Japan

    J. Kanzaki, T. Kawamoto, T. Kobayashi, M. Koshiba, M. Minowa, M. Nozaki, S. Odaka, S. Orito, A. Sato, H. Takeda, T. Takeshita, Y. Totsuka, Y. Watanabe, S. Yamada & C. Yanagisawa

Authors
  1. W. Bartel
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  2. L. Becker
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  3. C. Bowdery
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  4. D. Cords
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  5. R. Eichler
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  6. R. Felst
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  7. D. Haidt
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  8. H. Krehbiel
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  9. B. Naroska
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  10. J. Olsson
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  11. P. Steffen
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  12. P. Warming
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  13. G. Dietrich
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  14. E. Elsen
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  15. G. Heinzelmann
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  16. H. Kado
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  17. K. Meier
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  18. A. Petersen
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  19. U. Schneekloth
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  20. G. Weber
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  21. S. Bethke
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  22. A. Dieckmann
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  23. J. Heintze
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  24. K. H. Hellenbrand
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  25. R. D. Heuer
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  26. S. Komamiya
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  27. J. von Krogh
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  28. P. Lennert
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  29. H. Matsumura
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  30. H. Rieseberg
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  31. A. Wagner
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  32. A. Bell
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  33. A. Finch
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  34. F. Foster
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  35. G. Hughes
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  36. T. Nozaki
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  37. H. Wriedt
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  38. J. Allison
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  39. A. H. Ball
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  40. G. Bamford
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  41. R. Barlow
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  42. I. P. Duerdoth
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  43. I. Glendinning
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  44. F. K. Loebinger
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  45. A. A. Macbeth
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  46. H. McCann
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  47. H. E. Mills
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  48. P. G. Murphy
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  49. P. Rowe
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  50. K. Stephens
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  51. D. Clarke
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  52. R. Marshall
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  53. G. F. Pearce
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  54. J. B. Whittaker
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  55. J. Kanzaki
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  56. T. Kawamoto
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  58. M. Koshiba
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  60. M. Nozaki
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  61. S. Odaka
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  62. S. Orito
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  63. A. Sato
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  69. C. Yanagisawa
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JADE Collaboration., Bartel, W., Becker, L. et al. Measurement of the processese + e −→e + e − ande + e −→γγ at PETRA. Z. Phys. C - Particles and Fields 19, 197–203 (1983). https://doi.org/10.1007/BF01572248

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  • DOI: https://doi.org/10.1007/BF01572248

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