Gapless Color-Flavor-Locked Quark Matter
Gapless Color-Flavor-Locked Quark Matter
In neutral cold quark matter that is so dense that the strange quark mass ${M}_{s}$ is unimportant, all three quark flavors pair in a color-flavor locked (CFL) pattern, and all nine fermionic quasiparticles have a gap $\ensuremath{\Delta}$ (or $2\ensuremath{\Delta}$). We argue that, as the density decreases (or ${M}_{s}$ increases), there …