Nucleons in the Covariant Quark-Diquark Model

Details Nucleons in the Covariant Quark-Diquark Model Nucleons in the Covariant Quark-Diquark Model

2001-02-06

arxiv.org/abs/hep-ph/0102054v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, talk given at the XXIX Workshop on Gross Properties of Nuclei and Nuclear Excitations, Hirschegg, Jan 14-20, 2001

Scientific paper

We introduce diquarks as separable correlations in the two-quark Green's function to facilitate the description of baryons as relativistic three-quark bound states. These states then emerge as solutions of Bethe-Salpeter equations for quarks and diquarks that interact via quark exchange. Approximating quark and diquark propagators by the corresponding free ones, we calculate nucleon static properties and form factors. For the description of production processes off the nucleon, we consider various dressing functions for the propagators to remove unphysical thresholds. Results for kaon photoproduction, $\gamma p\to K\Lambda$, and associated strangeness production, $pp\to pK\Lambda$, allow us to draw conclusions on the permissibility of different dressing functions.

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