2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/45348An introduction to Chiral Perturbation Theory is given including a discussion of power counting, the Wess-Zumino term, the values of the coupling constants and the inclusion of the effects of other resonances.19 pages, latex, 2 figures. To be published in the second edition of the DA$Φ$NE Physics Handbook, eds. L. Maiani, G. Pancheri and N. Paver.High Energy Physics - Phenomenologytext