Nonperturbative versus perturbative effects in generalized parton distributions

Details Nonperturbative versus perturbative effects in generalized parton distributions Nonperturbative versus perturbative effects in generalized parton distributions

2004-07-20

arxiv.org/abs/hep-ph/0407228v3

Phys.Rev. D71 (2005) 034022

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 10 figures; submitted to Phys. Rev. D

Scientific paper

10.1103/PhysRevD.71.034022

Generalized parton distributions (GPDs) are studied at the hadronic (nonperturbative) scale within different assumptions based on a relativistic constituent quark model. In particular, by means of a meson-cloud model we investigate the role of nonperturbative antiquark degrees of freedom and the valence quark contribution. A QCD evolution of the obtained GPDs is used to add perturbative effects and to investigate the GPDs' sensitivity to the nonperturbative ingredients of the calculation at larger (experimental) scale.

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