Particle physics is a branch of theoretical and experimental physics dedicated to studying the fundamental constituents of matter and the forces through which they interact. It aims to understand the basic building blocks of the universe, such as quarks, leptons, and bosons, and the governing forces, which include electromagnetism, the strong nuclear force, and the weak nuclear force. The theory posits that matter is composed of elementary particles and that these particles interact through the exchange of force-carrying particles. Modern models, such as the Standard Model, describe these particles and forces within a mathematical framework, continually being refined by experiments conducted at particle accelerators to test predictions about matter's core structure and the origins of cosmic phenomena.