PS06 High Energy Nuclear Physics
Color superconductor with a color-sextet condensate
Department of Theoretical Physics, Nuclear Physics Institute, Academy of Sciences of the Czech Republic, 250 68 Řež, Czech Republic
Accepted: 24 October 2003
Published online: 6 November 2003
We analyze color superconductivity of one massive flavor quark matter at moderate baryon density with a spin-zero color-sextet condensate. The most general form of the order parameter implies complete breakdown of the SU(3)× U(1) symmetry. However, both the conventional fourth-order polynomial effective bosonic description and the fermionic NJL-type model in the mean-field approximation favor an enhanced O(3) symmetry of the ground state. We suggest two mechanisms how the complete symmetry breakdown could be achieved.
© Società Italiana di Fisica, Springer-Verlag, 2004