Eur. Phys. J. A (2010) 45: 217-232
https://doi.org/10.1140/epja/i2010-10997-7

Regular Article - Theoretical Physics

The dual parametrization for gluon GPDs

¹ CPhT, École Polytechnique, CNRS, 91128, Palaiseau, France
² LPT, Université d’Orsay, CNRS, 91404, Orsay, France
³ St. Petersburg State University, 198504, St. Petersburg, Petrodvoretz, Russia

^* e-mail: Kirill.Semenov@cpht.polytechnique.fr

Received: 15 January 2010
Accepted: 4 June 2010
Published online: 5 July 2010

Abstract

We consider the application of the dual parametrization for the case of gluon GPDs in the nucleon. This provides opportunities for the more flexible modeling of unpolarized gluon GPDs in a nucleon which in particular contain the invaluable information on the fraction of nucleon spin carried by gluons. We perform the generalization of the Abel transform tomography approach for the case of gluons. We also discuss the skewness effect in the framework of the dual parametrization. We strongly suggest to employ the fitting strategies based on the dual parametrization to extract the information on GPDs from the experimental data.