Electromagnetic Excitation of Nucleon Resonances
Nuclear Theory
2015-05-30 v1 High Energy Physics - Phenomenology
Abstract
Recent progress on the extraction of electromagnetic properties of nucleon resonance excitation through pion photo- and electroproduction is reviewed. Cross section data measured at MAMI, ELSA, and CEBAF are analyzed and compared to the analysis of other groups. On this basis, we derive longitudinal and transverse transition form factors for most of the four-star nucleon resonances. Furthermore, we discuss how the transition form factors can be used to obtain empirical transverse charge densities. Contour plots of the thus derived densities are shown for the Delta, Roper, S11, and D13 nucleon resonances.
Keywords
Cite
@article{arxiv.1109.6745,
title = {Electromagnetic Excitation of Nucleon Resonances},
author = {L. Tiator and D. Drechsel and S. S. Kamalov and M. Vanderhaeghen},
journal= {arXiv preprint arXiv:1109.6745},
year = {2015}
}
Comments
30 pages, 19 figures, 9 tables