The pion-cloud contribution to the electromagnetic nucleon structure
Kupelwieser, D. · Schweiger, W.
Original · EN
The present contribution continues and extends foregoing work on the calculation of electroweak form factors of hadrons using the point-form of relativistic quantum mechanics. Here we are particularly interested in studying pionic effects on the electromagnetic structure of the nucleon. To this aim we employ a hybrid constituent-quark model that comprises, in addition to the 3q valence component, also a 3q+π non-valence component. With a simple wave function for the 3q component we get reasonable results for the nucleon form factors. In accordance with other authors we find that the pionic effect is significant only below Q² 0.5 GeV².
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