Neutrality of the color-flavor-locked phase in a Dyson-Schwinger approach

Understand

The role of neutrality constraints for the phase structure of QCD at non-vanishing chemical potentials is studied within a self-consistent truncation scheme for the Dyson-Schwinger equation of the quark propagator in Landau gauge.

• We find the (approximate) color-flavor-locked phase to be energetically preferred at all potentially relevant densities and for physical values of the quark masses.
• We furthermore observe the impossibility to define this phase by residual global symmetries and discuss the role of chemical potentials.