Unified approach to pseudoscalar meson photoproductions off nucleons in the quark model

A unified approach to the pseudoscalar meson (pi, eta, 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 thr quark modal. 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, eta, and eta' photoproductions.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:A1997XR16200059&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Physics, NuclearSCI(E)62ARTICLE21099-11135