Tomography for amplitudes of hard exclusive processes
High Energy Physics - Phenomenology
2008-11-26 v2 High Energy Physics - Experiment
Nuclear Experiment
Abstract
We discuss which part of information about hadron structure encoded in the Generalized Parton Distributions (GPDs) [part of total GPD image] can be restored from the known amplitude of a hard exclusive process. The physics content of this partial image is analyzed. Among other things, we show that this partial image contains direct information about how the target hadron responses to the (string) quark-antiquark operator of {\it arbitrary} spin J. Explicit equations relating physics content of the partial image of GPDs directly to the data are derived. Also some new results concerning the dual parametrization of GPDs are presented.
Cite
@article{arxiv.0707.2509,
title = {Tomography for amplitudes of hard exclusive processes},
author = {M. V. Polyakov},
journal= {arXiv preprint arXiv:0707.2509},
year = {2008}
}
Comments
13 pages, no figures, misprints are corrected