Gauge-invariant meson photoproduction with extended nucleons
H. Haberzettl, C. Bennhold, T. Mart, T. Feuster
Abstract
The general gauge-invariant photoproduction formalism given by Haberzettl is applied to kaon photoproduction off the nucleon at the tree level, with form factors describing composite nucleons. Numerical results show that this gauge-invariance procedure, when compared to Ohta's, leads to a much improved description of experimental data. Predictions for the new Bonn SAPHIR data for p(γ,K+)Λ are given.
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