Speaker
Manuel Reichert
(University of Sussex)
Description
The functional renormalisation group is a powerful non-perturbative tool for the computation of the vacuum and finite-temperature effective potential. It is automatically IR-finite and includes the resummation of bubble diagrams, similar to Daisy and super-Daisy resummations in perturbation theory. I will introduce this tool and, as an example, show its application to the electroweak phase transition with polynomial and non-polynomial deformations of the Higgs potential at the TeV scale. Furthermore, I will discuss the dependence on the renormalisation group scale and show how reliable nucleation rates can be obtained despite the convexity of the effective potential.
Author
Manuel Reichert
(University of Sussex)