Mass-Induced Crystalline Color Superconductivity
Abstract
We demonstrate that crystalline color superconductivity may arise as a result of pairing between massless quarks and quarks with nonzero mass ms. Previous analyses of this phase of cold dense quark matter have all utilized a chemical potential difference δμ to favor crystalline color superconductivity over ordinary BCS pairing. In any context in which crystalline color superconductivity occurs in nature, however, it will be ms-induced. The effect of ms is qualitatively different from that of δμ in one crucial respect: ms depresses the value of the BCS gap 0 whereas δμ leaves 0 unchanged. This effect in the BCS phase must be taken into account before ms-induced and δμ-induced crystalline color superconductivity can sensibly be compared.
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