The pion-cloud contribution to the electromagnetic nucleon structure

D. Kupelwieser; W. Schweiger

The pion-cloud contribution to the electromagnetic nucleon structure

High Energy Physics - Phenomenology 2015-10-20 v1 Nuclear Theory

Authors: D. Kupelwieser , W. Schweiger

Abstract

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 $3q$ + $\pi$ 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 $Q^2\lesssim 0.5$ ~GeV $^2$ .

Keywords

nucleon form factor form factors pion production

Cite

@article{arxiv.1510.05521,
  title  = {The pion-cloud contribution to the electromagnetic nucleon structure},
  author = {D. Kupelwieser and W. Schweiger},
  journal= {arXiv preprint arXiv:1510.05521},
  year   = {2015}
}

Comments

Contribution presented by W. Schweiger at the Mini-Workshop Bled 2015: Exploring Hadron Resonances, Bled (Slovenia), July 5-11, 2015; 4 pages, 2 figures. arXiv admin note: substantial text overlap with arXiv:1508.03991

The pion-cloud contribution to the electromagnetic nucleon structure

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