Self-consistent parametrization of the two-flavor isotropic color-superconducting ground state

M. Buballa; J. Hošek; M. Oertel

doi:10.1103/PhysRevD.65.014018

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Self-consistent parametrization of the two-flavor isotropic color-superconducting ground state

M. Buballa, J. Hošek, M. Oertel

DOI 10.1103/PhysRevD.65.014018 · Physical Review D

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Abstract

Lack of Lorentz invariance of QCD at a finite quark chemical potential in general implies the need for Lorentz noninvariant condensates for the self-consistent description of the color-superconducting ground state. Moreover, the spontaneous breakdown of color SU(3) in this state naturally leads to the existence of SU(3) noninvariant nonsuperconducting expectation values. We illustrate these observations by analyzing the properties of an effective two-flavor Nambu–Jona-Lasinio-type Lagrangian and discuss the possibility of color-superconducting states with effectively gapless fermionic excitations. It turns out that the effect of the condensates so far neglected can yield new interesting phenomena.