We propose a physically motivated parametrization for the unpolarized generalized parton distributions, H and E, valid at both zero and non-zero values of the skewness variable, \zeta. At \zeta=0, H and E are determined using constraints from simultaneous fits of experimental data on both the nucleon elastic form factors and the deep inelastic structure functions. Lattice calculations of the higher moments constrain the parametrization at \zeta > 0. Our method provides a step towards a model independent extraction of generalized distributions from the data that is alternative to the mathematical ansatz of double distributions.
@article{arxiv.0709.0016,
title = {Generalized Parton Distributions from Hadronic Observables},
author = {S. Ahmad and H. Honkanen and S. Liuti and S. K. Taneja},
journal= {arXiv preprint arXiv:0709.0016},
year = {2017}
}
Comments
4 pages, 2 figures, to appear in the proceedings of DIS 2007