Particle physics is the study of the basic elements of matter and the forces which act among these basic elements. The goal of particle physics is to discover the fundamental laws that govern how matter is constructed. From these fundamental laws, particle physics then attempts to expand its theories into the laws that describe the physical universe. In fact, it is often the case that the study of the smallest subatomic particles gives rise to laws that hold for the largest objects, such as stars and galaxies, and provide insight into cosmological processes.

Particle physics is concerned with the search for the fundamental building blocks of matter. Well over 150 particles have thus far been described. Some particles are extraterrestrial, coming through space as cosmic rays. Others have been manufactured in particle accelerators. Particles are catalogued by the Particle Data Group, an international group of particle physicists...