Chiral Perturbation Theory

Chiral perturbation theory is a mathematical framework used in particle physics to study the interactions of particles, particularly in the context of the strong nuclear force that binds protons and neutrons in atomic nuclei. It focuses on particles called pions, which are the lightest mesons, and explores how they behave at low energies. By using symmetry principles related to the particle's properties, the theory helps physicists calculate various physical processes and make predictions about how these particles interact, providing insights into the fundamental forces governing matter at a microscopic level.