2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/49314A new mechanism for breaking an internal symmetry spontaneously is discussed, which is intermediate between the Nambu-Goldstone and Wigner modes of symmetry breaking. Here the quark-antiquark sea takes the role of the vacuum of the Nambu-Goldstone case. Flavour symmetry becomes a discrete permutation symmetry of the valence quarks with respect to the sea quarks, which can be spontaneously broken without generation of massless Goldstone bosons.6 pages in revtexHigh Energy Physics - PhenomenologyNuclear Theorytext