Parton saturation scaling function for exclusive production of vector mesons and Deeply Virtual Compton Scattering
| Autor: | F. G. Ben, Magno Valério Trindade Machado, Werner K. Sauter |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Particle physics Meson 010308 nuclear & particles physics Nuclear Theory Compton scattering FOS: Physical sciences Parton 01 natural sciences High Energy Physics - Experiment High Energy Physics - Phenomenology High Energy Physics - Experiment (hep-ex) High Energy Physics - Phenomenology (hep-ph) 0103 physical sciences Saturation (graph theory) Production (computer science) High Energy Physics::Experiment Vector meson Nuclear Experiment (nucl-ex) Nuclear Experiment 010303 astronomy & astrophysics Scaling Energy (signal processing) |
| DOI: | 10.48550/arxiv.1701.01141 |
| Popis: | 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 parameterization based on the scaling property depends only on the single variable $\tau_A = Q^2/Q_{\mathrm{sat}}^2$, where the saturation scale, $Q_{\mathrm{sat}}$, drives the energy dependence and the corresponding nuclear effects. This phenomenological result describes all available data from DESY-HERA for $\rho,\,\phi,\,J/\psi$ production and DVCS measurements. A discussion on the size of nuclear shadowing corrections on photon-nucleus interaction is also done. Comment: 8 pages, 3 figures and 2 tables. Extended version to be published in Physical Review D. Title has been changed |
| Databáze: | OpenAIRE |
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