2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/204713In light of the five-year data from the Wilkinson Microwave Anisotropy Probe (WMAP), we discuss models of inflation based on the pseudo Nambu-Goldstone potential predicted in five-dimensional gauge theories for different backgrounds: flat Minkowski, anti-de Sitter, and dilatonic spacetime. In this framework, the inflaton potential is naturally flat due to shift symmetries and the mass scales associated with it are related to 5D geometrical quantities.10 pages, 8 figures; matches version to appear in Phys. Rev. DHigh Energy Physics - Phenomenologytext