Determination of the radiative widths of the η′ and A2 from two-photon exchange production |
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| Authors: | H.J. Behrend,Ch. Chen,H. Fenner,J.H. Field,V. Schr?der,H. Sindt,G. D&#x Agostini,W.-D. Apel,S. Banerjee,J. Bodenkamp,D. Chrobaczek,J. Engler,G. Flügge,D.C. Fries,W. Fues,K. Gamerdinger,G. Hopp,F. Pierre |
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| Affiliation: | Deutsches Elektronen Synchrotron DESY, Hamburg, Fed. Rep. Germany;Kernforschungszentrum Karlsruhe and Universität Karlsruhe, Karlsruhe, Fed. Rep. Germany |
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| Abstract: | From the two-photon exchange processes e+e? → e+e?η' (958) → e+e??0γ and e+e? → e+e?A2 (1310) → e+e?π+π?π0 observed using the CELLO detector at PETRA the radiative widths of the η' and A2 have been determined with the results: Γγγ(η') = 5.4 ± 1.0[stat.] ± 0.7[syst.] keV; Γγγ(A2) = 0.59 ± 0.14[stat.] ?0.08+0.31[syst.] keV. |
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| Keywords: | CELLO Collaboration |
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