The pion-cloud contribution to the electromagnetic nucleon structure
| Autor: | Kupelwieser, D., Schweiger, W. |
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| Rok vydání: | 2015 |
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| Druh dokumentu: | Working Paper |
| Popis: | 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$^2$. Comment: 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 |
| Databáze: | arXiv |
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