2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/44499In this talk, we describe an effective theory for electroweak symmetry breaking without a physical Higgs, based on a symmetry larger than the electroweak gauge group. This symmetry forbids deviations from the Standard Model at the leading order in the appropriate chiral expansion. Indeed, the large symmetry allows for a consistent expansion of the effective theory in powers of momenta and spurions. The latter are automatically present: they define the covariant reduction from the large symmetry to the electroweak group.Proceedings of Rencontres de Moriond (Electroweak), 5-12 March 2005. 6 pagesHigh Energy Physics - Phenomenologytext