2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/45665These lectures introduce some of the basic notions of effective field theories, as used in particle physics. The topics discussed are the $ΔS=1$ and $ΔS =2$ weak interactions, and chiral perturbation theory as applied to mesons, baryons, and hadrons containing heavy quarks.Lectures on Effective Field Theories at the Lake Louise Winter Institute, February 1995. 42 pages, 16 figures; extended version in hep-ph/9606222High Energy Physics - Phenomenologytext