Two aspects of color superconductivity: gauge independence and neutrality

Abstract

A formal proof is given that the fermionic quasiparticle dispersion laws in a color superconductor are gauge independent. It is shown that the gluon (photon) field acquires a non-vanishing expectation value in a color superconductor, which is related to color (electric) neutrality.

Comments: 5 pages, to appear in the proceedings of SEWM 2004, Helsinki, 16-19 June 2004