Improved Light-Cone Sum Rules for the Electromagnetic Form Factors of the Nucleon
High Energy Physics - Phenomenology
2010-04-05 v1 Nuclear Experiment
Nuclear Theory
Abstract
We calculate the electromagnetic form factors of the nucleon within the light-cone sum rule approach. In comparison to previous work (hep-ph/0112085) we suggest to use a pure isospin-1/2 interpolating field for the nucleon, since the Chernyak-Zhitnitsky current leads to numerically large, unphysical, isospin violating contributions. The leading-order sum rules are derived for the form factors and the results are confronted with the experimental data. Our approach tends to favor the nucleon distribution amplitudes that are not far from the asymptotic shape.
Cite
@article{arxiv.hep-ph/0311082,
title = {Improved Light-Cone Sum Rules for the Electromagnetic Form Factors of the Nucleon},
author = {Alexander Lenz and Markus Wittmann and Eckart Stein},
journal= {arXiv preprint arXiv:hep-ph/0311082},
year = {2010}
}
Comments
10 pages, 5 figures