Neutral Color Superconductivity and Pseudo-Goldstone Modes

Abstract

Four of the five expected Goldstone modes, which will be eaten up by gauge fields, in neutral two-flavor color superconductor are actually pseudo-Goldstone modes, and their degenerated mass is exactly the magnitude of the color chemical potential, which is introduced to guarantee the color neutrality at moderate baryon density.

Comments: 5 pages, 2 figure