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- W1569173773 abstract "We study the stability of the kaon condensed color-flavor locked (CFL) phase of dense quark matter with regard to the formation of a nonzero Goldstone boson current. In the kaon condensed phase there is an electrically charged fermion which becomes gapless near ${ensuremath{mu}}_{s}^{(1)}ensuremath{simeq}1.35ensuremath{Delta}$ and a neutral fermion which becomes gapless near ${ensuremath{mu}}_{s}^{(2)}ensuremath{simeq}1.61ensuremath{Delta}$. Here, ${ensuremath{mu}}_{s}={m}_{s}^{2}/(2{p}_{F})$ is the shift in the Fermi energy due to the strange quark mass ${m}_{s}$ and $ensuremath{Delta}$ is the gap in the chiral limit. The transition to the gapless phase is continuous at ${ensuremath{mu}}_{s}^{(1)}$ and first order at ${ensuremath{mu}}_{s}^{(2)}$. We find that the magnetic screening masses are real in the regime ${ensuremath{mu}}_{s}<{ensuremath{mu}}_{s}^{(2)}$, but some screening masses are imaginary for ${ensuremath{mu}}_{s}>{ensuremath{mu}}_{s}^{(2)}$. We show that there is a very weak current instability for ${ensuremath{mu}}_{s}>{ensuremath{mu}}_{s}^{(1)}$ and a more robust instability in a small window near ${ensuremath{mu}}_{s}^{(2)}$. We show that in the Goldstone boson current phase all components of the magnetic screening mass are real. There is a range of values of ${ensuremath{mu}}_{s}$ below $2ensuremath{Delta}$ in which the magnetic gluon screening masses are imaginary but the phase is stable with respect to electrically neutral fluctuations of the gauge field." @default.
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- W1569173773 date "2007-03-13" @default.
- W1569173773 modified "2023-09-27" @default.
- W1569173773 title "Goldstone boson currents in a kaon condensed color-flavor locked phase" @default.
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- W1569173773 doi "https://doi.org/10.1103/physrevd.75.054012" @default.
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