2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/221425We reconsider the two different facets of $π$ and $K$ mesons as $q \bar q$ bound states and approximate Nambu-Goldstone bosons. We address several topics, including masses, mass splittings between $π$ and $ρ$ and between $K$ and $K^*$, meson wavefunctions, charge radii, and the $K-π$ wavefunction overlap.15 pages, latexHigh Energy Physics - Phenomenologytext