2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/189246We present recent results on finite temperature electromagnetic form factors and the electrical conductivity in a pion gas. The standard Chiral Perturbation Theory power counting needs to be modified for transport coefficients. We pay special attention to unitarity and to possible applications for dilepton and photon production.4pp, 2 figures, talk given at "Strong and Electroweak Matter 2006", BNL, May 2006High Energy Physics - Phenomenologytext