Leptons are one of the fundamental particles in particle physics, along with quarks and bosons. They are classified into three types: electrons, muons, and tau particles, each with their own unique properties. Leptons are not affected by the strong nuclear force, only the weak nuclear force and electromagnetic force, making them important for studying interactions at the smallest scales of matter. Research on leptons involves studying their interactions with other particles, their properties such as mass and charge, and their role in theories such as the Standard Model of particle physics. Leptons are also involved in processes such as beta decay and neutrino interactions, which are important for understanding the behavior of subatomic particles.