Bulk viscosity in 2SC and CFL quark matter
arXiv:0709.4251 · doi:10.1063/1.2823860
Abstract
The bulk viscosities of two color-superconducting phases, the color-flavor locked (CFL) phase and the 2SC phase, are computed and compared to the result for unpaired quark matter. In the case of the CFL phase, processes involving kaons and the superfluid mode give the largest contribution to the bulk viscosity since all fermionic modes are gapped. In the case of the 2SC phase, ungapped fermionic modes are present and the process u+d <-> u+s provides the dominant contribution. In both cases, the bulk viscosity can become larger than that of the unpaired phase for sufficiently large temperatures (T >~ 1 MeV for CFL, T >~ 0.1 MeV for 2SC). Bulk viscosity (as well as shear viscosity) is important for the damping of r-modes in compact stars and thus can potentially be used as an indirect signal for the presence or absence of color-superconducting quark matter.
8 pages, 3 figures, contribution to the proceedings of QCD@Work 2007, Martina Franca (Italy)
Cited by in corpus (14)
- General relativistic polytropes for anisotropic matter: The general formalism and applications
- Dissipative collapse of axially symmetric, general relativistic, sources: A general framework and some applications
- Stellar models with like--Tolman IV complexity factor
- Large amplitude behavior of the bulk viscosity of dense matter
- Cracking of general relativistic anisotropic polytropes
- Constraining color flavor locked strange stars in the gravitational wave era
- Uncharged and charged anisotropic like--Durgapal stellar model with vanishing complexity
- Gravitational cracking and complexity in the framework of gravitational decoupling
- Radial oscillations of color superconducting self-bound quark stars
- Viscous damping of r-mode oscillations in compact stars with quark matter
- All static spherically symmetric anisotropic solutions for general relativistic polytropes
- Gravitational Cracking of General Relativistic Polytropes: a generalized scheme
- The newly born magnetars powering gamma-ray burst internal-plateau emission: are there strange stars?
- Double relativistic master polytrope for anisotropic matter