A study of two-photon production of two-body final states with invariant mass greater than 2.0 GeV

Ch Berger*, H. Genzel, R. Grigull, W. Lackas, F. Raupach, W. Wagner, A. Klovning, E. Lillestöl, M. Olsen, H. Ackermann, G. Alexander, G. Bella, J. Bürger, L. Criegee, A. Eskreys, G. Franke, Ch Gerke, G. Knies, E. Lehmann, U. MichelsenK. H. Pape, H. D. Reich, J. M. Scarr, B. Stella, U. Timm, G. G. Winter, S. T. Xue, W. Zimmermann, O. Achterberg, V. Blobel, L. Boesten, V. Hepp, H. Kapitza, B. Koppitz, B. Lewendel, W. Lührsen, R. Van Staa, H. Spitzer, C. Y. Chang, R. G. Glasser, R. G. Kellogg, K. H. Lau, S. J. Maxfield, R. O. Polvado, B. Sechi-Zorn, J. A. Skard, A. Skuja, A. J. Tylka, G. Welch, G. T. Zorn, A. Bäcker, F. Barreiro, S. Brandt, K. Derikum, C. Grupen, H. J. Meyer, B. Neumann, M. Rost, K. Stupperich, G. Zech, H. J. Daum, H. Meyer, O. Meyer, D. Schmidt

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


We have measured the electron, muon, and charged-hadron pair production rates in two-phonon interactions for invariant masses above 2.0 GeV over a large of momentum transfer. The cross sections for electron and muon pairs show good agreement with the QED predictions at both small and large momentum transfer. The observed rate of hadron production is less than 6% of the rate that QED predicts for point-like hadrons, consistent with recent leading-order QCD calculations.

Original languageEnglish
Pages (from-to)189-200
Number of pages12
JournalNuclear Physics, Section B
Issue number2
StatePublished - 19 Jul 1982
Externally publishedYes


FundersFunder number
Norwegian Council for Science and Humanities
U.S. Department of Energy
Instituto Nazionale di Fisica Nucleare
Bundesministerium für Forschung und Technologie


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