Eur. Phys. J. C (2009) 59: 769-776
https://doi.org/10.1140/epjc/s10052-008-0844-7

Regular Article - Theoretical Physics

Nuclear DVCS at small x using color-dipole phenomenology

Centro de Ciências Exatas e Tecnológicas, Universidade Federal do Pampa Campus de Bagé, Rua Carlos Barbosa, CEP, 96400-970, Bagé, RS, Brazil

^* e-mail: magnus@if.ufrgs.br

Received: 21 October 2008
Revised: 25 November 2008
Published online: 9 January 2009

Abstract

Using the high-energy color-dipole formalism, we study the coherent and incoherent nuclear DVCS process, γ ^* A→γ  X, in the small-x regime. We consider simple models for the elementary dipole–hadron scattering amplitude that capture the main features of the dependence on atomic number A, on energy and on momentum transfer t. Using the amplitudes obtained we make predictions for the nuclear DVCS cross section at the photon level in collider kinematics.