GPD sum rules: a tool to reveal the quark angular momentum
High Energy Physics - Phenomenology
2008-07-02 v1
Abstract
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 . Its first Mellin moment is the anomalous gravitomagnetic moment, which is the unknown contribution to the quark angular momentum.
Cite
@article{arxiv.0807.0170,
title = {GPD sum rules: a tool to reveal the quark angular momentum},
author = {K. Kumericki and D. Mueller and K. Passek-Kumericki},
journal= {arXiv preprint arXiv:0807.0170},
year = {2008}
}
Comments
LaTeX + dis08.cls, 4 pages, talk by D.M. at DIS 2008, London