Unification of the strong, weak, and electro-magnetic interactions, based on the U(1) x SU(2) x SU(3) gauge group. Introduction to quantum field theory and the Feynman rules. Gauge invariance and non-Abelian Gauge Theories. The Standard Model Lagrangian. Electroweak theory and quantum chromodynamics. Masses and the Higgs mechanism. W and Z boson widths and decay channels. Quarks, gluons, confinement, and jets. Mesons, baryons, and glueballs. The Higgs boson. Running coupling constants in QED and QCD. Quark mixing angles, CP violation, and KM matrix. Beyond the Standard Model: grand unification, supersymmetry, supergravity, and superstrings.pre-rec: PHYS 447.