2003 CERN - CLAF School of High-energy Physics: Mexico City, Mexico 1 - 14 Jun 2003

The CERN–CLAF School of High-Energy Physics is intended to give young physicists an introduction to the theoretical aspects of recent advances in elementary particle physics. These proceedings contain lectures on field theory and the Standard Model, quantum chromodynamics, physics beyond the Standard Model, and neutrino physics, as well as reports on heavy-ion physics, astrophysics, instrumentation, and trigger and dataacquisition systems.