This lecture provides an introduction to the physics at high-energy colliders, with special emphasis on QCD effects. Collider experiments are the main tool to study short-distance physics and the Large Hadron Collider is about to open a new window to the TeV scale. However, the prediction of collider processes is challenging: in order to be able to use perturbation theory, one has to define observables which are insensitive to low energy QCD effects, or use factorization theorems to separate high- and low energy physics. After an introduction to QCD, we will cover some of the theoretical issues in electron-positron, electron-hadron, and hadron-hadron scattering.

This lecture was given in the winter term 2009. The lecture notes are linked below. They are also available as a single file (250 pages, 14.6MB), which however does not contain the figures.

- Outline and some references
- 1. Introduction
- 2. Non-abelian gauge theory
- 3. Perturbative QCD
- 4. e
^{+}e^{-}→ hadrons - 5. Operator product expansion in e
^{+}e^{-} - 6. Event shapes and jets (figures)
- 7. Soft-Collinear Effective Theory
- 8. Deep Inelastic Scattering (DIS)
- 9. Hadron-hadron scattering
- 10. Parton shower and Monte Carlo methods

- Exercise 1, due Sept. 25.
- Exercise 2, due Oct. 9.
- Exercise 3, due Nov. 13.

Thomas Becher