Nucleon Form Factors in Dispersion Theory
High Energy Physics - Phenomenology
2007-05-23 v1
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.
Keywords
Cite
@article{arxiv.hep-ph/0602121,
title = {Nucleon Form Factors in Dispersion Theory},
author = {H. -W. Hammer},
journal= {arXiv preprint arXiv:hep-ph/0602121},
year = {2007}
}
Comments
9 pages, 9 figures, invited talk at the Symposium "20 Years of Physics at the Mainz Microtron MAMI", October 20-22, 2005, Mainz, Germany