High energy deeply virtual Compton scattering on a photon and related meson exclusive production

In this work we estimate the differential cross section for the high energy deeply virtual Compton scattering on a photon target, gamma(*)gamma ->gamma gamma, within the QCD dipole-dipole scattering formalism. For the phenomenology, a saturation model for the dipole-dipole cross section for two photon scattering is considered. Its robustness is supported by a good description of current accelerator data. In addition, we consider the related exclusive vector meson production processes, gamma(*)gamma -> V gamma. This analysis is focused on the light rho and phi meson production, which produces larger cross sections. The phenomenological results are compared with the theoretical calculation using the color-dipole Balitsky-Fadin-Kuraev-Lipatov approach.