Speaker
Prof.
Axel Torsten Maas
(University of Graz)
Description
In many gauge theories the dynamics is dominated by a classical solution with small fluctuations around it. The primary examples are electroweak physics and quantum gravity, but also many proposed extensions of the standard model like grand-unified theories.
The Fröhlich-Morchio-Strocchi (FMS) mechanism is a manifestly gauge-invariant approach augmenting perturbation theory to describe matrix elements in these settings, and has been demonstrated to be superior to perturbation theory alone. This mechanism is outlined and some pertinent examples are given, especially in cases where ordinary perturbation theory does not prove fully satisfactory results.
Author
Prof.
Axel Torsten Maas
(University of Graz)