Spin-one color superconductivity in compact stars?- an analysis within NJL-type models

Abstract

We present results of a microscopic calculation using NJL-type model of possible spin-one pairings in two flavor quark matter for applications in compact star phenomenology. We focus on the color-spin locking phase (CSL) in which all quarks pair in a symmetric way, in which color and spin states are locked. The CSL condensate is particularly interesting for compact star applications since it is flavor symmetric and could easily satisfy charge neutrality. Moreover, the fact that in this phase all quarks are gapped might help to suppress the direct Urca process, consistent with cooling models. The order of magnitude of these small gaps (~1 MeV) will not influence the EoS, but their also small critical temperatures (T_c ~800 keV) could be relevant in the late stages neutron star evolution, when the temperature falls below this value and a CSL quark core could form.

7 pages, 7 figures, revised version, accepted for the Conference Proceedings of "Isolated Neutron Stars: from the Interior to the Surface", London, 24-28. April 2006

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Cited by in corpus (6)

• Color superconductivity in dense quark matter
• Dense matter in compact stars - A pedagogical introduction
• Rapid cooling of the compact star in Cassiopea A as a phase transition in dense QCD
• Helical ordering in the ground state of spin-one color superconductors as a consequence of parity violation
• Spin-one color superconductors: collective modes and effective Lagrangian
• Compact Stars as Hideouts For Color-spin-locked Quark Matter: Implications for Powering High-energy Electromagnetic Emissions