A toy model for generalised parton distributions

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We give the results of a simple model for the diagonal and off-diagonal valence quark distributions of a pion. We show that structure can be implemented in a gauge-invariant manner. This explicit model questions the validityof the momentum sum rule, and gives an explicit counter-example to the Wandzura-Wilczek ansatz for twist-3 GPD's.
11 pages, presented at HADRONIC PHYSICS (HLPR 2004): Joint Meeting-Heidelberg-Liege-Paris-Rostock, Spa, Belgium, 16-18 December 2004, 11 pages, 11 figures, LaTeX

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High Energy Physics - Phenomenology

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http://salesiana.dossiersoluciones.com/handle/123456789/44507

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/hep-ph/0507281
 http://arxiv.org/abs/hep-ph/0507281
 AIP Conf.Proc. 775 (2005) 61
 doi:10.1063/1.1961043

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arXiv