Speaker
Description
We provide a universal expression of cross sections for the exclusive vector meson production and deeply virtual Compton scattering (DVCS) in photon-proton and photon-nucleus interactions based on the geometric scaling phenomenon. The theoretical parametrization based on the scaling property depends only on the single variable $\tau_A = \frac{Q^2}{Q_{sat}^2}$, where the saturation scale, $Q_{sat}$, drives the energy dependence and the corresponding nuclear effects. This phenomenological result describes all available data from DESY-HERA for $\rho,\phi$ and $J/\psi$ production and DVCS measurements. A discussion is also carried out on the size of nuclear shadowing corrections on photon-nucleus interaction.
This work has been published in the following paper https://journals.aps.org/prd/abstract/10.1103/PhysRevD.96.054015
