A brief introduction to the gradient flow in non-abelian gauge theories

by Martin Luescher (CERN)

Friday 18 Feb 2011, 11:00 → 12:00 Europe/Zurich

4/2-011 - TH common room (CERN)

Somewhat surprisingly, the gradient flow in non-abelian gauge theories (including QCD) does not require renormalization. The flow equation thus generates a one-parameter family of smooth gauge fields, whose correlation functions are automatically finite. At the non-perturbative level, the construction provides interesting new ways to probe the theory from short to long distances.