2003/03/31 by T. Brauner, J. Hosek, R. Sykora
Physics and Astronomy · #hep-ph
paper · pdf · doi:10.1103/physrevd.68.094004
published as Phys.Rev. D68 (2003) 094004 · 8 pages, REVTeX4; v2:references added; v3: corrected, new four-quark interaction proposed, extensive discussion of the assumptions added; version to appear in Phys. Rev. D
arxiv created 2003/09/10 · arxiv updated 2009/11/30
We analyze color superconductivity of one massive flavor quark matter at moderate baryon density with a spin-zero color-sextet condensate. The most general Higgs-type ground-state expectation value of the order parameter implies complete breakdown of the SU(3)xU(1) symmetry. However, both the conventional fourth-order polynomial effective bosonic description, and the NJL-type fermionic description in the mean-field approximation favor an enhanced SO(3) symmetry of the ground state. We ascribe this finding to the failure of the mean-field approximation and propose that a more sophisticated technique is needed.