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arXiv · 0704.3691

Electroproduction of kaons from the proton in a Regge-plus-resonance approach

T. Corthals·T. Van Cauteren·P. Van Craeyveld·J. Ryckebusch·D. G. Ireland
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Abstract

We present a Regge-plus-resonance (RPR) description of the p(e,e'K^+)Y processes (Y=Λ,Σ^0) in the resonance region. The background contributions to the RPR amplitude are constrained by the high-energy p(γ, K^+)Y data. As a result, the number of free model parameters in the resonance region is considerably reduced compared to typical effective-Lagrangian approaches. We compare a selection of RPR model variants, originally constructed to describe $KY$ photoproduction, with the world electroproduction database. The electromagnetic form factors of the intermediate N^*s and $Δ^*s are computed in the Bonn constituent-quark model. With this input, we find a reasonable description of the p(e,e'K^+)Y data without adding or readjusting any parameters. It is demonstrated that the electroproduction response functions are extremely useful for fine-tuning both the background and resonant contributions to the reaction dynamics.

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T. Corthals, T. Van Cauteren, P. Van Craeyveld, J. Ryckebusch, D. G. Ireland. 2007-09-25. Electroproduction of kaons from the proton in a Regge-plus-resonance approach. https://doi.org/10.1016/j.physletb.2007.09.036

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