Bulk viscosity due to kaons in color-flavor-locked quark matter

Abstract

We calculate the bulk viscosity of color-superconducting quark matter in the color-flavor-locked (CFL) phase. We assume that the lightest bosons are the superfluid mode H and the kaons K0 and K+, and that there is no kaon condensate. We calculate the rate of strangeness-equilibrating processes that convert kaons into superfluid modes, and the resultant bulk viscosity. We find that for oscillations with a timescale of milliseconds, at temperatures T << 1 MeV, the CFL bulk viscosity is much less than that of unpaired quark matter, but at higher temperatures the bulk viscosity of CFL matter can become larger.

23 pages, LaTeX; corrected typos and a numerical error in the last 3 figures. Conclusions unchanged

References in corpus (3)

• Low-Energy Quantum Effective Action for Relativistic Superfluids
• Bulk viscosity in 2SC quark matter
• Novel Phases at High Density and their Roles in the Structure and Evolution of Neutron Stars

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• A diagrammatic derivation of the meson effective masses in the neutral color-flavor-locked phase of Quantum Chromodynamics
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