2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/127173A fascinating new generation of experiments has determined certain meson scattering parameters at high precision. A confluence of highly sophisticated theory as well as new experimental ideas have led to this state of affairs, which sheds important light on the properties of the strong interactions. A brief review of the experiments and the theory is presented.5 pages, latex, to appear in Current SciencePopular PhysicsHigh Energy Physics - ExperimentHigh Energy Physics - PhenomenologyPhysics Educationtext