Simultaneous Photoproduction of {eta} and {pi}{sup 0} Mesons on the Proton
Journal Article
·
· Physical Review Letters
- IN2P3, Institut de Physique Nucleaire, 91406 Orsay (France)
- INFN, sezione di Roma II and Universita di Roma 'Tor Vergata', 00133 Rome (Italy)
- INFN, Laboratori Nazionali del Sud and Universita di Catania, 95123 Catania (Italy)
The analysis of the {gamma}p{yields}{eta}{pi}{sup 0}p reaction has been performed using data from the GRAAL experiment. The total and differential cross sections and the beam asymmetry have been obtained from threshold up to 1.5 GeV of beam energy. The two resonances S{sub 11}(1535) and {delta}(1700) are expected to be excited in the intermediate states of this reaction. The results are used to test predictions based on the assumption that both resonances are dynamically generated from the meson-baryon interaction provided by chiral Lagrangians. The term involving the {delta}(1700) excitation, followed by the decay into {eta}{delta}(1232), is found to be dominant.
- OSTI ID:
- 21024711
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 5 Vol. 100; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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