GPD sum rules: a tool to reveal the quark angular momentum

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In deeply virtual exclusive electroproduction to leading order accuracy one accesses generalized parton distributions on their cross-over trajectory. Combining Lorentz covariance and analyticity leads to a family of GPD sum rules, guiding us to phenomenological concepts. As an example, we discuss the constraints from the JLAB/Hall A data on the GPD $E$. Its first Mellin moment is the anomalous gravitomagnetic moment, which is the unknown contribution to the quark angular momentum.
LaTeX + dis08.cls, 4 pages, talk by D.M. at DIS 2008, London

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High Energy Physics - Phenomenology

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http://salesiana.dossiersoluciones.com/handle/123456789/163957

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0807.0170
 http://arxiv.org/abs/0807.0170

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arXiv