Tomography for amplitudes of hard exclusive processes

2007/07/29 by Maxim V. Polyakov, M. V. Polyakov · 3 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph #nucl-ex

paper · pdf · doi:10.1016/j.physletb.2007.11.012

published as Phys.Lett.B659:542-550,2008 · 13 pages, no figures, misprints are corrected

arxiv created 2007/07/29 · openalex publication_date 2007/11/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

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 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.

Citations

• Hard exclusive electroproduction of two pions and their resonances

Cited by

• Large-Nsummation of chiral logs for generalized parton distributions
• Forward-like functions for dual parametrization of GPDs from the nonlocal chiral quark model
• Local two-photon couplings and theJ=0fixed pole in real and virtual Compton scattering