2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/56825We prove that in the Euclidean representation of the three dimensional massless Nelson model the t = 0 projection of the interacting measure is absolutely continuous with respect to a Gaussian measure with suitably adjusted mean. We also determine the Hamiltonian in the Fock space over this Gaussian measure space.Mathematical PhysicsProbabilitytext