EPJ Web Conf.
Volume 113, 201621st International Conference on Few-Body Problems in Physics
|Number of page(s)||4|
|Published online||25 March 2016|
The Pion-Cloud Contribution to the Electromagnetic Nucleon Form Factors
Institute of Physics, University of Graz, A-8010 Graz, Austria
Published online: 25 March 2016
We study the electromagnetic structure of the nucleon within a hybrid constituent-quark model that comprises, in addition to the 3q valence component, also a 3q+π non-valence component. To this aim we employ a Poincaré-invariant multichannel formulation based on the point-form of relativistic quantum mechanics. With a simple 3-quark wave function for the bare nucleon, i.e. the 3q-component, we obtain reasonable results for the nucleon form factors and predict the meson-cloud contribution to be significant only below Q2 ≲ 0:5 GeV2 amounting to about 10% for Q2 → 0, in accordance with the findings of other authors.
© Owned by the authors, published by EDP Sciences, 2016
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