Abstract

Axel Maas( Friedrich-Schiller-Universität Jena, Germany)


G2 gauge theories

QCD is a particular case of a family of theories. One possibility to understand QCD itself is therefore to study other members of this family, and identify the conditions under which they have features with QCD in common. One such sibling of QCD is G2 QCD, where the gauge group of QCD, SU(3), is replaced by the exceptional Lie group G2. Conceptually, this allows us to understand the relevance of the center symmetry of QCD. Practically, as G2QCD has no sign problem but still has baryonic fermions, it allows one to investigate a QCD-like theory at finite density. Using lattice simulation, the consequences of both facts will be presented.