An isobar model for η photo- and electroproduction on the nucleon

Eta photo- and electroproduction on the nucleon is studied using an isobar model. The model contains Born terms, and contributions from vector-meson exchanges and nucleon resonances. Our results are compared with recent eta-photoproduction data for differential and total cross sections, beam asymmet...

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Bibliographic Details
Published in:Nuclear physics. A 2002-03, Vol.700 (1), p.429-453
Main Authors: Chiang, Wen-Tai, Yang, Shin Nan, Tiator, Lothar, Drechsel, Dieter
Format: Article
Language:English
Subjects:
Electroproduction
Eta meson
Isobar model
Nucleon resonances
Photoproduction
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Summary:Eta photo- and electroproduction on the nucleon is studied using an isobar model. The model contains Born terms, and contributions from vector-meson exchanges and nucleon resonances. Our results are compared with recent eta-photoproduction data for differential and total cross sections, beam asymmetry, and target asymmetry, as well as electroproduction data. Besides the dominant S 11(1535) resonance, we show that the second S 11 resonance, S 11(1650), is also necessary to be included in order to extract S 11(1535) resonance parameters properly. In addition, the beam asymmetry data allow us to extract very small (
ISSN:0375-9474
DOI:10.1016/S0375-9474(01)01325-2