Particle Physics is the study of the fundamental constituents of matter and the forces between them. Particle Physics, Third Edition, provides a short introduction to particle physics, which emphasizes the foundations of the standard model in experimental data, rather than its more formal and theoretical aspects. It is intended for undergraduate students who have previously taken introductory courses in nonrelativistic quantum mechanics and special relativity. The structure of the book is simple. The first three chapters give a brief overview of the subject. They introduce some of the basic ideas that are used extensively throughout the rest of the book and discuss leptons, quarks and hadrons and the interactions between them. The remaining chapters discuss a wide selection of important topics in more detail. These include experimental methods; space–time symmetries; the quark model of hadrons; quantum chromodynamics and jet physics; the weak interaction,...