2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/48244We study the possible mixings between gauge vector fields and scalar fields through their self-energies, arising in models with two Higgs doublets. We derive the relevant set of Schwinger-Dyson equations and the Ward identities that compel the longitudinal parts of the field propagators. Linear $(R_ξ)$ gauge is used and the results are given at all orders in perturbative theory, and some particular aspects of the one loop case are stressed.21 pages, LaTeX, eps figuresHigh Energy Physics - Phenomenologytext