On the mistake in the implementation of the minimal model of the dual parameterization and resulting inability to describe the high-energy DVCS data

Details On the mistake in the implementation of the minimal model of the dual parameterization and resulting inability to describe the high-energy DVCS data On the mistake in the implementation of the minimal model of the dual parameterization and resulting inability to describe the high-energy DVCS data

2008-10-21

arxiv.org/abs/0810.3899v1

Phys.Rev.D79:017501,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 1 figure

Scientific paper

10.1103/PhysRevD.79.017501

We correct the mistaken claim made in \cite{Guzey:2005ec,Guzey:2006xi} that the minimal model of the dual parameterization of nucleon generalized parton distributions (GPDs) gives a good, essentially model-independent description of high-energy data on deeply virtual Compton scattering (DVCS). In the implementation of the dual parameterization in \cite{Guzey:2005ec,Guzey:2006xi}, the numerical prefactor of two in front of the DVCS amplitude was missing. We show that the corrected minimal model of the dual parameterization significantly overestimates the HERA data (H1 and ZEUS) on the DVCS cross section.

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