2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/192161We study duality transformations for two-dimensional sigma models with abelian chiral isometries and prove that generic such transformations are equivalent to integrated marginal perturbations by bilinears in the chiral currents, thus confirming a recent conjecture by Hassan and Sen formulated in the context of Wess-Zumino-Witten models. Specific duality transformations instead give rise to coset models plus free bosons.15 pagesHigh Energy Physics - Theorytext