Scaling Tests of the Cross Section for Deeply Virtual Compton Scattering
Nuclear Experiment
2012-08-27 v2
Abstract
We present the first measurements of the \vec{e}p->epg cross section in the deeply virtual Compton scattering (DVCS) regime and the valence quark region. The Q^2 dependence (from 1.5 to 2.3 GeV^2) of the helicity-dependent cross section indicates the twist-2 dominance of DVCS, proving that generalized parton distributions (GPDs) are accessible to experiment at moderate Q^2. The helicity-independent cross section is also measured at Q^2=2.3 GeV^2. We present the first model-independent measurement of linear combinations of GPDs and GPD integrals up to the twist-3 approximation.
Keywords
Cite
@article{arxiv.nucl-ex/0607029,
title = {Scaling Tests of the Cross Section for Deeply Virtual Compton Scattering},
author = {The Hall A DVCS Collaboration},
journal= {arXiv preprint arXiv:nucl-ex/0607029},
year = {2012}
}
Comments
5 pages, 4 figures, 2 tables. Text shortened for publication. References added. One figure removed