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, Sachio 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

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Abstract

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
Volume19
Issue number3
DOIs
Publication statusPublished - 1983 Sep 1
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Bartel, W., Becker, L., Bowdery, C., Cords, D., Eichler, R., Felst, R., Haidt, D., Krehbiel, H., Naroska, B., Olsson, J., Steffen, P., Warming, P., Dietrich, G., Elsen, E., Heinzelmann, G., Kado, H., Meier, K., Petersen, A., Schneekloth, U., ... Yanagisawa, C. (1983). Measurement of the processes e+e-→e+e- and e+e-→γγ at PETRA. Zeitschrift für Physik C Particles and Fields, 19(3), 197-203. https://doi.org/10.1007/BF01572248