Relativistic Quark Spin Coupling Effects in the Nucleon Electromagnetic Form Factors
Nuclear Theory
2014-11-18 v1
Abstract
We investigate the effect of different forms of relativistic spin coupling of constituent quarks in the nucleon electromagnetic form factors. The four-dimensional integrations in the two-loop Feynman diagram are reduced to the null-plane, such that the light-front wave function is introduced in the computation of the form factors. The neutron charge form factor is very sensitive to different choices of spin coupling schemes, once its magnetic moment is fitted to the experimental value. The scalar coupling between two quarks is preferred by the neutron data, when a reasonable fit of the proton magnetic momentum is found.
Keywords
Cite
@article{arxiv.nucl-th/9911016,
title = {Relativistic Quark Spin Coupling Effects in the Nucleon Electromagnetic Form Factors},
author = {W. R. B. de Araujo and E. F. Suisso and T. Frederico and M. Beyer and H. J. Weber},
journal= {arXiv preprint arXiv:nucl-th/9911016},
year = {2014}
}
Comments
13 pages, needs axodraw.ps and axodraw.sty for diagrams of Fig. 1