2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/51291In the Brans-Dicke model we treat the scalar field exactly and expand the gravitational field in a power series. A comparison with 2D sigma models and ϕ^{4} perturbation theory in four dimensions suggests that the perturbation series in 4D Brans-Dicke model is renormalizable.Latex, 9 pagesHigh Energy Physics - Theorytext