2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/142372Phenomenological studies of odderon effects are shortly reviewed. Special emphasis is devoted to a recent study of the exclusive production of J/psi or Upsilon in pp and bar p p collisions, where the meson emerges from the pomeron--odderon and the pomeron--photon fusion.8 pages, 6 figures, talk presented at the conference "New Trends in High-Energy Physics" (experiment, phenomenology, theory) Yalta, Crimea, Ukraine, September 15 - 22, 2007High Energy Physics - Phenomenologytext