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Abstract: We propose a physically motivated parametrization for the unpolarizedgeneralized parton distributions, H and E, valid at both zero and non-zerovalues of the skewness variable, \zeta. At \zeta=0, H and E are determinedusing constraints from simultaneous fits of experimental data on both thenucleon 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 ofgeneralized distributions from the data that is alternative to the mathematicalansatz of double distributions.



Autor: S. Ahmad, H. Honkanen, S. Liuti, S.K. Taneja

Fuente: https://arxiv.org/







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