Bulk viscosity of spin-one color superconductors with two quark flavors

Abstract

We consider the contribution of the Urca-type processes to the bulk viscosity of several spin-one color-superconducting phases of dense two-flavor quark matter. In the so-called transverse phases which are suggested to be energetically favorable at asymptotic densities, the presence of ungapped quasiparticle modes prevents that spin-one color superconductivity has a large effect on the bulk viscosity. When all modes are gapped, as for one particular color-spin-locked phase, the effect on the viscosity can be quite large, which may have important phenomenological implications.

10 pages, 6 figures, Discussion is extended and several references added. Version accepted for publication in Phys. Rev. D

References in corpus (4)

• Two lectures on color superconductivity
• Effect of hyperon-hyperon interaction on bulk viscosity and r-mode instability in neutron stars
• Bulk viscosity in 2SC quark matter
• Phase space and quark mass effects in neutrino emissions in a color superconductor

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