The 3d O(4) model as an effective approach to the QCD phase diagram
The 3d O(4) model as an effective approach to the QCD phase diagram
The QCD phase diagram is one of the most prominent outstanding puzzles within the Standard Model. Various experiments, which aim at its exploration beyond small baryon density, are operating or in preparation. From the theoretical side, this is an issue of non-perturbative QCD, and therefore of lattice simulations. However, a …