Possible Color Octet Quark-Anti-Quark Condensate in the Instanton Model

Abstract

Inspired by a recent proposal for a Higgs description of QCD we study the possible formation of a color-octet/flavor-octet quark-anti-quark condensate in the instanton liquid model. For this purpose we calculate two-point correlation functions of color-singlet and octet quark-anti-quark operators. We find long range order in the standard $<\bar{\psi }\psi >$ channel, but not in the color-octet channel. We emphasize that similar calculations in lattice QCD can check whether or not a color-flavor locked Higgs phase is realized in QCD at zero temperature and baryon density.

Comments: 10 pages, 2 figures, (revised) added discussion of flavor symmetry breaking source terms