Speaker
Alina Czajka
(Jan Kochanowski University)
Description
The effective action obtained within the hard loop approximation determines, in particular, a spectrum of collective excitations which is a fundamental characteristics of any many-body system. We show that the actions of gauge bosons, fermions and scalars are of unique forms for a whole class of a gauge theories such as QED, scalar QED, SUSY QED, QCD, super Yang-Mills, irrespective of a field content and some specific interactions. Consequently, long-wave or semiclassical features of plasma systems governed by these theories such as collective excitations are almost identical. An origin of the universality is discussed.
Authors
Alina Czajka
(Jan Kochanowski University)
Stanislaw Mrowczynski
(Jan Kochanowski University)
