Generalized Parton Distributions and Hadronic Observables

Details Generalized Parton Distributions and Hadronic Observables Generalized Parton Distributions and Hadronic Observables

2007-12-14

arxiv.org/abs/0712.2412v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

Proceedings of Workshop on "Exclusive Reactions at High Momentum Transfer", May 21-24, 2007, Jefferson Lab, Newport News, VA U

Scientific paper

Following a previous detailed study of unpolarized generalized parton distribution functions in the non-singlet sector, and at zero values of the skewness variable, $\zeta$, we propose a physically motivated parametrization that is valid at $\zeta \neq 0$. Our method makes use of information from the nucleon form factor data, from deep inelastuc scattering parton distribution functions, and from lattice results on the Mellin moments of generalized parton distributions. It provides, therefore, a step towards a model independent extraction of generalized distributions from the data, alternative to the mathematical ansatz of double distributions. Comparisons with recent experimental data on the proton are shown.

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