2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/34459We discuss the expected amplitude of a cosmic background of massive, non-relativistic dilatons, and we report recent results about its possible detection. This paper is a contracted version of a talk given at the 15th SIGRAV Conference on "General Relativity and Gravitational Physics" (Villa Mondragone, Roma, September 2002).6 pages, latex, IOP style ecssm.sty included, to appear in Proc. of the 15th SIGRAV Conference on General Relativity and Gravitational PhysicsGeneral Relativity and Quantum CosmologyHigh Energy Physics - Theorytext