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ETA PHOTOPRODUCTION IN A COUPLED-CHANNELS APPROACH
[chapter]
2001
NSTAR 2001
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 role
doi:10.1142/9789812810878_0030
fatcat:2leuu3cov5fn5o72wlh7spaoz4