2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/39002Within the framework of the ``Rome approach'' for a lattice chiral gauge theory, the four-quark interaction with flavour symmetry is included. We analyse spontaneous symmetry breaking and compute composite modes and their contributions to the ground state energy. As a result, it is shown that the emergence of a heavy quark family is the energetically favoured solution.a talk at Melbourne Lat'95 and to appear in Phys. Lett. BHigh Energy Physics - LatticeHigh Energy Physics - Phenomenologytext