Nonperturbative versus perturbative effects in generalized parton distributions
High Energy Physics - Phenomenology
2009-11-10 v3
Abstract
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.
Cite
@article{arxiv.hep-ph/0407228,
title = {Nonperturbative versus perturbative effects in generalized parton distributions},
author = {B. Pasquini and M. Traini and S. Boffi},
journal= {arXiv preprint arXiv:hep-ph/0407228},
year = {2009}
}
Comments
17 pages, 10 figures; submitted to Phys. Rev. D