2018/03/22 by F. G. Ben, Ben, Felipe G., M. V. T. Machado +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.1803.08442
openalex publication_date 2018/03/22 · openalex created_date 2022/09/11 · openalex updated_date 2026/07/28
In this work, we investigate the exclusive production of particles in\nscattering processes in the so-called saturation region. Within this scheme the\nphenomenon of geometric scaling takes place: cross sections are functions only\nof a dimensionless combination of the relevant kinematic variables, which\nhappens both in inclusive and diffractive cases, as in the production of vector\nmesons. In particular, the scaling variable is given in general by \τ =\nQ2/Qs2, where Q2 is the photon virtuality and Qs represents the\nsaturation scale, which drives the energy dependence and the corresponding\nnuclear effects. Based on the scaling property, we are able to derive a\nuniversal expression for the cross sections for the exclusive vector meson\nproduction and deeply virtual Compton scattering (DVCS) in both photon-proton\nand photon-nucleus interactions. This phenomenological result describes all\navailable data from DESY-HERA for \ρ, \φ and J/\ψ production and\nDVCS measurements. A discussion is also carried out on the size of nuclear\nshadowing corrections on photon-nucleus interaction.\n