Mass-induced crystalline color superconductivity

Joydip Kundu; Krishna Rajagopal

doi:10.1103/PhysRevD.65.094022

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Mass-induced crystalline color superconductivity

Joydip Kundu, Krishna Rajagopal

DOI 10.1103/PhysRevD.65.094022 · Physical Review D

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Abstract

We demonstrate that crystalline color superconductivity may arise as a result of pairing between massless quarks and quarks with a 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 Δ0 whereas δμ leaves Δ0 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.