Mark Alford and Krishna Rajagopal JHEP06(2002)031 doi:10.1088/1126-6708/2002/06/031
Absence of two-flavor color-superconductivity in compact stars
Mark Alford1 and Krishna Rajagopal2
Show affiliationsThe simplest pattern of color superconductivity involves BCS pairing between up and down quarks. We argue that this `2SC' phase will not arise within a compact star. A macroscopic volume of quark matter must be electrically neutral and must be a color singlet. Satisfying these requirements imposes a significant free energy cost on the 2SC phase, but not on color-flavor locked (CFL) quark matter, in which up, down and strange quarks all pair. As a function of increasing density, therefore, one may see a single phase transition from hadronic matter directly to CFL quark matter. Alternatively, there may be an intervening phase in which the different flavors self-pair, or pair with each other in a non-BCS pattern, such as in a crystalline color superconductor.
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E-print Number: hep-ph/0204001
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12.38.-t Quantum chromodynamics
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Issue 06 (June 2002)
Received 10 June 2002, accepted for publication 12 June 2002
Published 1 July 2002
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Absence of two-flavor color-superconductivity in compact stars
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