2015/07/13 by H. G. Dosch, Dosch, H. G., Evandro Maia Ferreira +1 · 1 citation
Engineering · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle Accelerators and Free-Electron Lasers #Quantum and Classical Electrodynamics #Relativity and Gravitational Theory
paper · pdf · doi:10.48550/arxiv.1507.03442
openalex publication_date 2015/07/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The energy dependence of the cross sections for electromagnetic diffractive processes can be well described by a single power, Wδ. For J/ψ photoproduction this holds in the range from 20 GeV to 2 TeV. This feature is most easily explained by a single pole in the angular momentum plane which depends on the scale of the process, at least in a certain range of values of the momentum transfer. It is shown that this assumption allows a unified description of all electromagnetic elastic diffractive processes. We also discuss an alternative model with an energy dependent dipole cross section, which is compatible with the data up to 2 TeV and which shows an energy behaviour typical for a cut in the angular momentum plane.