Discovery of neutrino and oscillation phenomenon

As an intersection of particle physics, nuclear physics and geophysics, neutrinos are currently a hot research direction in the physics field, and it plays an important role in the study of the origin and evolution of the universe and the formation and evolution of celestial bodies. The Standard Model of particle physics has achieved great success in describing experimental phenomena in particle physics and correctly classifying known particles. In 2015, Takaaki Kajita and Arthur B. McDonald won the Nobel Prize in Physics for their discovery of neutrino oscillations, which brought neutrino research to a climax. In recent years, major breakthroughs have been made in the study of neutrinos, with the discovery that neutrinos have mass and that different neutrinos can be transformed into each other in a way known as neutrino oscillations, or neutrino mixing. Neutrino oscillations are the only physical phenomenon so far that cannot be explained by the Standard Model. Because neutrinos play an important role in both the most microscopic particle physics and the most macroscopic formation and evolution of the universe, the study of neutrinos is increasingly becoming a popular research direction. In this paper, the neutrino oscillation experiment is comprehensively studied and interpreted from the perspective of historical development. Designed to verify the existence of neutrino oscillations and thus prove that neutrinos have mass.