2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/182075Hot and/or dense, normal-conducting systems of relativistic fermions exhibit a particular collective excitation, the so-called plasmino. We compute the one-loop self-energy, the dispersion relation and the spectral density for fermions interacting via attractive boson exchange. It is shown that plasminos also exist in superconductors.15 pages, 14 figures, revtexNuclear TheorySuperconductivityHigh Energy Physics - Phenomenologytext