Bulk viscosity in kaon condensed matter

Abstract

We investigate the effect of $K^{-}$ condensed matter on bulk viscosity and r-mode instability in neutron stars. The bulk viscosity coefficient due to the non-leptonic process $n\rightleftharpoons p+K^{-}$ is studied here. In this connection, equations of state are constructed within the framework of relativistic field theoretical models where nucleon-nucleon and kaon-nucleon interactions are mediated by the exchange of scalar and vector mesons. We find that the bulk viscosity coefficient due to the non-leptonic weak process in the condensate is suppressed by several orders of magnitude. Consequently, kaon bulk viscosity may not damp the r-mode instability in neutron stars.

LaTeX, 32 pages, 9 figures; two tables and one new figure are added; some figures are modified and discussed in section III; version to appear in Phys. Rev. D

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Cited by in corpus (19)

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• Heavy Baryons in Compact Stars
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• Bulk viscosity of baryonic matter with trapped neutrinos
• Bulk viscosity in kaon-condensed color-flavor locked quark matter
• Bulk viscosity from Urca processes: $npe\mu$ matter in the neutrino-trapped regime
• R-modes as a New Probe of Dark Matter in Neutron Stars
• Critical temperature for kaon condensation in color-flavor locked quark matter
• Leptonic contribution to the bulk viscosity of nuclear matter
• Bulk viscosity in hyperonic star and r-mode instability
• Hyperon bulk viscosity in the presence of antikaon condensate
• Hyperon bulk viscosity in strong magnetic fields
• Dynamic migration of rotating neutron stars due to a phase transition instability
• Relativistic correction to the r-mode frequency in light of multi-messenger constraints
• Properties of strongly magnetized ultradense matter and their imprints on magnetar pulsations
• Magnetic field generated by r-modes in accreting quark stars
• Shear viscosity in antikaon condensed matter
• A new approach to bulk viscosity in strange quark matter at high densities
• Bulk viscosity and r-modes of neutron stars