Universality of Generalized Parton Distributions in Light-Front Holographic QCD.
The structure of generalized parton distributions is determined from light-front holographic QCD up to a universal reparametrization function $w(x)$ which incorporates Regge behavior at small $x$ and inclusive counting rules at $x \to 1$. A simple ansatz for $w(x)$ which fulfills these physics constraints with a single-parameter results in precise descriptions of both the nucleon and the pion quark distribution functions, in contrast with global fits and models which require a large number of parameters. The analytic structure of the amplitudes leads to a connection with the Veneziano model.
Publisher URL: http://arxiv.org/abs/1801.09154
DOI: arXiv:1801.09154v2
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