heavy quark effective theory

Heavy Quark Effective Theory (HQET) is a framework in particle physics used to study the behavior of heavy quarks, such as bottom and charm quarks, within hadrons (particles made of quarks). Since heavy quarks move slowly compared to the speed of light, HQET simplifies calculations by focusing on their mass and interactions while treating lighter quarks differently. This theory helps physicists understand the properties and decay processes of heavy hadrons and predict outcomes in experiments, enhancing our knowledge of fundamental forces and the structure of matter. It bridges concepts in quantum chromodynamics, the theory of strong interactions.