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1-2-3-flavor color superconductivity in compact stars
University of Wroclaw.
Argonne National Laboratory, Argonne, IL.
2008 (engelsk)Inngår i: Journal of Physics G: Nuclear and Particle Physics, ISSN 0954-3899, E-ISSN 1361-6471, Vol. 35, nr 10Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We suggest a scenario where the three light quark flavors are sequentially deconfined under increasing pressure in cold asymmetric nuclear matter as, e.g., in neutron stars. The basis for our analysis is a chiral quark matter model of Nambu–Jona-Lasinio (NJL) type with diquark pairing in the single flavor color-spin-locking (CSL), 2-flavor (2SC) and 3-flavor color-flavor locking (CFL) channels, and a Dirac–Brueckner–Hartree–Fock (DBHF) approach in the nuclear matter sector. We find that nucleon dissociation sets in at about the saturation density, n0, when the down-quark Fermi sea is populated (d-quark dripline) due to the flavor asymmetry imposed by β-equilibrium and charge neutrality. At about 3n0 u-quarks appear forming a 2-flavor color superconducting (2SC) phase, while the s-quark Fermi sea is populated only at still higher baryon density. The hybrid star sequence has a maximum mass of 2.1 M. Two- and 3-flavor quark matter phases are found only in gravitationally unstable hybrid star solutions.

sted, utgiver, år, opplag, sider
2008. Vol. 35, nr 10
Identifikatorer
URN: urn:nbn:se:ltu:diva-8770DOI: 10.1088/0954-3899/35/10/104077Lokal ID: 74eafb20-e8f2-11de-bae5-000ea68e967bOAI: oai:DiVA.org:ltu-8770DiVA, id: diva2:981708
Merknad
Upprättat; 2008; Bibliografisk uppgift: Paper id:: 4077; 20091214 (fresan)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-05-04bibliografisk kontrollert

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