2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/126165We confront different models for medium modifications of the electromagnetic correlation function to recent dimuon spectra from the NA60 collaboration for central In-In collisions at the CERN-SPS. In the low-mass region (M \lesssim 1.0 GeV), we evaluate medium modifications of the spectral properties of ρ-, ω- and ϕ-mesons. In the intermediate-mass region (M>1.0 GeV), we employ schematic models for the mixing of vector and axialvector current correlators, which provide a mechanism for chiral-symmetry restoration.8 pages, 6 figures, contribution to the proceedings of the 22nd Winter Workshop on Nuclear DynamicsHigh Energy Physics - PhenomenologyNuclear ExperimentNuclear Theorytext