Lepton physics focuses on the properties, interactions, and behavior of leptons, which are a group of elementary particles that includes the electron, muon, and tau. Leptons are important building blocks of matter and play a crucial role in understanding the fundamental forces of nature. Research in lepton physics involves studying the properties and behaviors of these particles in various experimental settings, including particle accelerators and detectors. This field of study helps scientists to better understand the fundamental interactions that govern the universe and provides valuable insights into the nature of matter and the evolution of the cosmos.