Unified approach to pseudoscalar meson photoproductions off nucleons in the quark model
- 1 August 1997
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review C
- Vol. 56 (2) , 1099-1113
- https://doi.org/10.1103/physrevc.56.1099
Abstract
A unified approach to the pseudoscalar meson (π, η, and K) photoproductions off nucleons are presented. It begins with the low energy QCD Lagrangian, and the resonances in the s and u channels are treated in the framework of the quark model. The duality hypothesis is imposed to limit the number of the t-channel exchanges. The CGLN amplitudes for each reaction are evaluated, which include both proton and neutron targets. The important role of the S-wave resonances in the second resonance region is discussed, and is particularly important for the K, η, and η′ photoproductions.Keywords
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