A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2007; you can also visit the original URL.
The file type is
Eta photoproduction on the nucleon is studied in a coupled-channels approach based on an effective Lagrangian. We compare to new differential cross section and beam asymmetry data data from the GRAAL collaboration. At energies above the S 11´1 535µ region we find no sign of p-wave nucleon resonance contributions. The forward-peaking of the beam asymmetry data at higher energy is explained in terms of vector meson t-channel contributions. These new polarization data also reveal a novel roledoi:10.1142/9789812810878_0030 fatcat:2leuu3cov5fn5o72wlh7spaoz4