Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-04-29
Phys.Rev.D84:023004,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
13 pages, 6 figures; Explanations and one reference added; version to be published in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.84.023004
We evaluate the three bulk viscosity coefficients $\zeta_1, \zeta_2$ and $\zeta_3$ in the color-flavor locked (CFL) superfluid phase due to phonons and kaons, which are the lightest modes in that system. We first show that the computation is rather analogous to the computation of the same coefficients in superfluid $^4$He, as due to phonons and rotons. For astrophysical applications, we also find the value of the viscosities when there is a periodic disturbance, and the viscosities also depend on the frequency of the disturbance. In a temperature regime that might be of astrophysical relevance, we find that the contributions of both the phonons and kaons should be considered, and that $\zeta_2$ is much less that the same coefficient in unpaired quark matter
Bierkandt Robert
Manuel Cristina
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