# Modern renormalization and collider physics

# Winter, 2008, TIFR

## Part A: Renormalization and effective theories

### What is renormalization?

Renormalization and renormalization group flows; effective long distance theories. A solvable example to illustrate the notions of ultraviolet cutoff, fixed points, stability of low-energy scattering matrix elements, bound state energies, non-trivial scaling etc.

### Effective theories and new physics

Effective theory of QED: the Euler-Heisenberg action. Axions: how to include unknown physics into effective theories. Applications to astrophysics. Effective theories of modified gravity.

### Effective theories of electroweak symmetry breaking

### Effective theories at finite temperature

## Part B: Application to colliders

### Perturbative QCD: a single scale

### Two scales: Sudakov resummations

### Hydrodynamics: evolution of slow modes

### Colour glass condensate: parton saturation

Sourendu Gupta: Created on Sep 7, 2007.