Nonlocality effects on spin-one pairing patterns in two-flavor color superconducting quark matter and compact stars applications
arXiv:hep-ph/0512001 · doi:10.1134/S1547477107030016
Abstract
We study the influence of nonlocality in the interaction on two spin one pairing patterns of two-flavor quark matter: the anisotropic blue color paring besides the usual two color superconducting matter (2SCb), in which red and green colors are paired, and the color spin locking phase (CSL). The effect of nonlocality on the gaps is rather large and the pairings exhibit a strong dependence on the form factor of the interaction, especially in the low density region. The application of these small spin-one condensates for compact stars is analyzed: the early onset of quark matter in the nonlocal models may help to stabilize hybrid star configurations. While the anisotropic blue quark pairing does not survive a big asymmetry in flavor space as imposed by the charge neutrality condition, the CSL phase as a flavor independent pairing can be realized as neutral matter in compact star cores. However, smooth form factors and the missmatch between the flavor chemical potential in neutral matter make the effective gaps of the order of magnitude keV, and a more systematic analysis is needed to decide whether such small gaps could be consistent with the cooling phenomenology.
18 pages, 7 figures, corrected version with revised parameterization
References in corpus (19)
- NJL-model analysis of dense quark matter
- The phase diagram of neutral quark matter: Self-consistent treatment of quark masses
- The phase diagram of three-flavor quark matter under compact star constraints
- Neutron stars and the transition to color-superconducting quark matter
- Quark Hadron Continuity in QCD with one Flavor
- Cooling of Neutron Stars with Color Superconducting Quark Cores
- Single color and single flavor color superconductivity
- The ground state in a spin-one color superconductor
- Anisotropic admixture in color-superconducting quark matter
- Quark mass effects on the stability of hybrid stars
- Color-spin locking phase in two-flavor quark matter for compact star phenomenology
- Neutrino emission and cooling rates of spin-one color superconductors
- Hybrid stars with color superconductivity within a nonlocal chiral quark model
- Neutron star cooling constraints for color superconductivity in hybrid stars
- How robust is a 2SC quark matter phase under compact star constraints?
- Cooling of Neutron Stars with Color Superconducting Quark Cores
- Diquark condensation effects on hot quark star configurations
- Two flavor color superconductivity in nonlocal chiral quark models
- Exploring the QCD phase diagram with compact stars