Production processes as a tool to study parametrizations of quark confinement - art. no. 014004

We introduce diquarks as separable correlations in the two-quark Green's fu nction to facilitate the description of baryons as relativistic three-quark bound states. These states then emerge as solutions of Bethe-Salpeter equa tions for quarks and diquarks that interact via quark exchange. When solvin g these equations we consider various dressing functions for the free quark and diquark propagators that prohibit the existence of corresponding asymp totic states and thus effectively parametrize confinement. We study the imp lications of qualitatively different dressing functions on the model predic tions for the masses of the octet baryons as well as the electromagnetic an d strong form factors of the nucleon. For different dressing functions we i n particular compare the predictions for kaon photoproduction. gammap-->K L ambda. and associated strangeness production, pp-->pK Lambda, with experime ntal data. This leads to conclusions on the permissibility of different dre ssing functions.