Neutral color-spin-locking phase in neutron stars
Department of Applied Physics, University of Alicante, Apartado Correos 99, 03080, Alicante, Spain
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Accepted: 25 December 2006
Published online: 26 March 2007
We present results for the spin-1 color-spin-locking (CSL) phase using a NJL-type model in two-flavor quark matter for compact stars applications. The CSL condensate is flavor symmetric and therefore charge and color neutrality can easily be satisfied. We find small energy gaps ≃ 1MeV, which make the CSL matter composition and the EoS not very different from the normal quark matter phase. We keep finite quark masses in our calculations and obtain no gapless modes that could have strong consequences in the late cooling of neutron stars. Finally, we show that the region of the phase diagram relevant for neutron star cores, when asymmetric flavor pairing is suppressed, could be covered by the CSL phase.
PACS: 24.85.+p Quarks, gluons, and QCD in nuclei and nuclear processes – / 26.60.+c Nuclear matter aspects of neutron stars –
© Società Italiana di Fisica and Springer-Verlag, 2007