2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/211007A brief introduction to the physics of ultraperipheral collisions at collider energies is given. Photon-hadron (proton/ nucleus) and photon-photon interactions can be studied in a hitherto unexplored energy regime.3 pages, 2 figures, Proceedings of PHOTON 2007, Paris 9-13 July 2007, to be published in Nucl. Phys. B (Proceedings Supplements)High Energy Physics - PhenomenologyNuclear Theorytext