2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/46722Chiral perturbation theory has to be substantially modified for the problem of nuclear forces. Loop effects dominate over tree level effects. The dominant behaviours in the scalar isoscalar channel and multi-nucleon forces are obtained in the chiral limit and for a small explicit breaking.4 pages, Revtex, 3 figures in .ps filesHigh Energy Physics - PhenomenologyNuclear Theorytext