Gapless two-flavor color superconductor

Physics – High Energy Physics – High Energy Physics - Phenomenology

Scientific paper

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Details

6 pages, 4 figures. 1 reference and 1 figure are added; the discussion of the effective potential properties is extended

Scientific paper

10.1016/S0370-2693(03)00748-2

A new, gapless two-flavor color superconducting phase that appears under conditions of local charge neutrality and $\beta$-equilibrium is revealed. In this phase, the symmetry of the ground state is the same as in the conventional two-flavor color superconductor. In the low-energy spectrum of this phase, however, there are only two gapped fermionic quasiparticles, and the other four quasiparticles are gapless. The origin and the basic properties of the gapless two-flavor color superconductor are discussed. This phase is a natural candidate for quark matter in cores of compact stars.

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