Measurement of the processes e+e-→e+e- and e+e-→γγ at PETRA

W. Bartel*, L. Becker, C. Bowdery, D. Cords, R. Eichler, R. Felst, D. Haidt, H. Krehbiel, B. Naroska, J. Olsson, P. Steffen, P. Warming, G. Dietrich, E. Elsen, G. Heinzelmann, H. Kado, K. Meier, A. Petersen, U. Schneekloth, G. WeberS. Bethke, A. Dieckmann, J. Heintze, K. H. Hellenbrand, R. D. Heuer, S. Komamiya, J. von Krogh, P. Lennert, H. Matsumura, H. Rieseberg, A. Wagner, A. Bell, A. Finch, F. Foster, G. Hughes, T. Nozaki, H. Wriedt, 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, D. Clarke, R. Marshall, G. F. Pearce, J. B. Whittaker, 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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)


Cross sections for the reactions e+e-→e+e- (Bhabha scattering) and e+e-→γγ are measured for center-of-mass (c.m.) energies {Mathematical expression} 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, {Mathematical expression}, the 1 δ limits 0.12<sin2 θ{symbol}w<0.38 are obtained for the weak mixing angle. The higher order (α3) QED processes e+e-→e+e-γ and e+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 reaction e+e-→e+e-γ.

Original languageEnglish
Pages (from-to)197-203
Number of pages7
JournalZeitschrift für Physik C Particles and Fields
Issue number3
Publication statusPublished - 1983 Sept
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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