Lepton interactions refer to the interactions involving elementary particles known as leptons, which include electrons, muons, and taus, as well as their corresponding neutrinos. Leptons are fundamental particles that do not experience the strong nuclear force, and their interactions are governed by the weak nuclear force and electromagnetic force. Lepton interactions play a crucial role in the study of particle physics, as they provide insights into the fundamental forces and particles that make up the universe. These interactions are studied in high-energy particle accelerators, such as the Large Hadron Collider, where leptons are collided at high speeds to observe their interactions and study the properties of fundamental particles. Research in lepton interactions has led to important discoveries in particle physics, including the confirmation of the existence of neutrinos and the theory of the electroweak force. Understanding lepton interactions is essential for advancing our understanding of the fundamental forces and particles that govern the universe.