Nucleon Form Factors in Dispersion Theory

Details Nucleon Form Factors in Dispersion Theory Nucleon Form Factors in Dispersion Theory

2006-02-14

arxiv.org/abs/hep-ph/0602121v1

Eur.Phys.J. A28 (2006) 49-57

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1140/epja/i2006-09-006-5

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.

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