Fiore, RobertoJenkovszky, Lázsló L.Magas, VolodymyrPaccanoni, F.Prokudin, A.2010-05-062010-05-0620070556-2821https://hdl.handle.net/2445/12524J/psi photoproduction is studied in the framework of the analytic S-matrix theory. The differential and integrated elastic cross sections for J/psi photoproduction are calculated from a dual amplitude with Mandelstam analyticity. It is argued that, at low energies, the background, which is the low-energy equivalent of the high-energy diffraction, replaces the Pomeron exchange. The onset of the high-energy Pomeron dominance is estimated from the fits to the data.10 p.application/pdfeng(c) The American Physical Society, 2007Partícules (Física nuclear)Reaccions nuclearsTeoria de la matriu SParticles (Nuclear physics)Nuclear reactionsS-matrix theoryinfo:eu-repo/semantics/article556047info:eu-repo/semantics/openAccess