Generalized Parton Distributions from Hadronic Observables

Details Generalized Parton Distributions from Hadronic Observables Generalized Parton Distributions from Hadronic Observables

2007-08-31

arxiv.org/abs/0709.0016v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 2 figures, to appear in the proceedings of DIS 2007

Scientific paper

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.

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