Nucleon Form Factors in Dispersion Theory

Abstract

Dispersion relations provide a powerful tool to analyse the electromagnetic form factors of the nucleon both in the space-like and time-like regions with constraints from other experiments, unitarity, and perturbative QCD. We give a brief introduction into dispersion theory for nucleon form factors and present first results from our ongoing form factor analysis. We also calculate the two-pion continuum contribution to the isovector spectral functions drawing upon the new high statistics measurements of the pion form factor by the CMD-2, KLOE, and SND collaborations.

9 pages, 9 figures, invited talk at the Symposium "20 Years of Physics at the Mainz Microtron MAMI", October 20-22, 2005, Mainz, Germany

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• Measurement of GEp/GMp in ep -> ep to Q2 = 5.6 GeV2
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Cited by in corpus (9)

• Dispersion analysis of the nucleon form factors including meson continua
• Nucleon Electromagnetic Form Factors in the Timelike Region
• Dispersion-theoretical analysis of the electromagnetic form factors of the nucleon: Past, present and future
• On the strong energy dependence of the e^+e^- to ppbar amplitude near threshold
• The nucleon and Delta(1232) form factors at low momentum-transfer and small pion masses
• Hadron structure at low Q^2
• Determination of Nucleon Form factors from Baryonic B Decays
• Baryon Form Factors
• Structure of the $\Omega$ baryon and the kaon cloud