Bulk viscosity in 2SC and CFL quark matter

Simple item page
dc.creatorAlford, Mark G.
dc.creatorSchmitt, Andreas
dc.date2007-09-26
dc.date.accessioned2026-07-07T10:57:32Z
dc.date.available2026-07-07T10:57:32Z
dc.descriptionThe 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.
dc.description8 pages, 3 figures, contribution to the proceedings of QCD@Work 2007, Martina Franca (Italy)
dc.identifierhttps://arxiv.org/abs/0709.4251
dc.identifierhttp://arxiv.org/abs/0709.4251
dc.identifierAIPConf.Proc.964:256-263,2007
dc.identifierdoi:10.1063/1.2823860
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/186786
dc.subjectNuclear Theory
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleBulk viscosity in 2SC and CFL quark matter
dc.typetext

Files

Collections

arXiv