Gauge-invariant meson photoproduction with extended nucleons
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photoproductiondatagauge-invariantgivennucleonsappliedbonncompared
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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 $p(\gamma,K^+)\Lambda$ are given.
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