On the pion cloud of the nucleon

D. Drechsel (Mainz U.); FZ J\"ulich); H.-W. Hammer (Bonn U.); Ulf-G. Mei{\ss}ner (Bonn U.

On the pion cloud of the nucleon

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arxiv hep-ph/0310240 v2 pith:4ECYLN4C submitted 2003-10-20 hep-ph nucl-th

H.-W. Hammer (Bonn U.) , D. Drechsel (Mainz U.) , Ulf-G. Mei{ss}ner (Bonn U. , FZ Jülich) This is my paper · ORCID

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keywords cloudpionnucleoncalculatechargecontributionanalysischarges

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We evaluate the two--pion contribution to the nucleon electromagnetic form factors by use of dispersion analysis and chiral perturbation theory. After subtraction of the rho--meson component, we calculate the distributions of charge and magnetization in coordinate space, which can be interpreted as the effects of the pion cloud. We find that the charge distribution of this pion cloud effect peaks at distances of about 0.3 fm. Furthermore, we calculate the contribution of the pion cloud to the isovector charges and radii of the nucleon.

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Baryon Form Factors
hep-ph 2024-12 accept novelty 2.0 of 10

A review of baryon form factors summarizing the authors' dispersion-theoretical fits, which yield r_p^E = 0.840 fm, r_p^M = 0.849 fm, and r_n^M = 0.864 fm.

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