Tomography for amplitudes of hard exclusive processes

Details Tomography for amplitudes of hard exclusive processes Tomography for amplitudes of hard exclusive processes

2007-07-17

arxiv.org/abs/0707.2509v2

Phys.Lett.B659:542-550,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, no figures, misprints are corrected

Scientific paper

10.1016/j.physletb.2007.11.012

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.

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