Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-03-27
Phys.Rev. D68 (2003) 094004
Physics
High Energy Physics
High Energy Physics - Phenomenology
8 pages, REVTeX4; v2:references added; v3: corrected, new four-quark interaction proposed, extensive discussion of the assumpt
Scientific paper
10.1103/PhysRevD.68.094004
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.
Brauner Tomáš
Hosek Jan
Sykora R.
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