Measurement of exclusive η′ production in γγ reactions

Ch Berger*, A. Deuter, H. Genzel, W. Lackas, J. Pielorz, F. Raupach, W. Wagner, A. Klovning, E. Lillestöl, J. Bürger, L. Criegee, F. Ferrarotto, G. Franke, M. Gaspero, Ch Gerke, G. Knies, B. Lewendel, J. Meyer, U. Michelsen, K. H. PapeB. Stella, U. Timm, G. G. Winter, M. Zachara, W. Zimmermann, P. J. Bussey, S. L. Cartwright, J. B. Dainton, B. T. King, C. Raine, J. M. Scarr, I. O. Skillicorn, K. M. Smith, J. C. Thomson, O. Achterberg, V. Blobel, D. Burkart, K. Diehlmann, M. Feindt, H. Kapitza, B. Koppitz, M. Krüger, M. Poppe, H. Spitzer, R. van Staa, C. Y. Chang, R. G. Glasser, R. G. Kellogg, S. J. Maxfield, R. O. Polvado, B. Sechi-Zorn, J. A. Skard, A. Skuja, A. J. Tylka, G. E. Welch, G. T. Zorn, F. Almeida, A. Bäcker, F. Barreiro, S. Brandt, K. Derikum, C. Grupen, H. J. Meyer, H. Müller, B. Neumann, M. Rost, K. Stupperich, G. Zech, G. Alexander, G. Bella, Y. Gnat, J. Grunhaus, H. Junge, K. Kraski, C. Maxeiner, H. Maxeiner, H. Meyer, D. Schmidt

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We observe γγ → η′ production in the reaction e+e- → e+e-π+π-γ. We measure the product γγγ(η′)B(η′ → ρ{variant}0γ) to be 1.14 ± 0.08 ± 0.11 keV. A first measurement of the γγ → η′ transition form factor is made for Q2 up to 1 GeV2.

Original languageEnglish
Pages (from-to)125-129
Number of pages5
JournalPhysics Letters B
Volume142
Issue number1-2
DOIs
StatePublished - 12 Jul 1984

Funding

FundersFunder number
Basic Research Foundation
Norwegian Council for Science and Humanities
Sezione di Roma
U.S. Department of Energy
Israel Academy of Sciences and Humanities
Instituto Nazionale di Fisica Nucleare
Bundesministerium für Forschung und Technologie
Science and Engineering Research Council

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