Deconfinement transition in protoneutron stars: Analysis within the Nambu-Jona-Lasinio model

Journal Article · Thu Apr 15 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.085012· OSTI ID:21409638

Lugones, G; Grunfeld, A G ^[1]; Scoccola, N N ^[1]

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1. CONICET, Rivadavia 1917, (1033) Buenos Aires (Argentina)

We study the effect of color superconductivity and neutrino trapping on the deconfinement transition of hadronic matter into quark matter in a protoneutron star. To describe the strongly interacting matter a two-phase picture is adopted. For the hadronic phase we use different parametrizations of a nonlinear Walecka model which includes the whole baryon octet. For the quark-matter phase we use an SU(3){sub f} Nambu-Jona-Lasinio effective model which includes color superconductivity. We impose color and flavor conservation during the transition in such a way that just deconfined quark matter is transitorily out of equilibrium with respect to weak interactions. We find that deconfinement is more difficult for small neutrino content and it is easier for lower temperatures although these effects are not too large. In addition they will tend to cancel each other as the protoneutron star cools and deleptonizes, resulting a transition density that is roughly constant along the evolution of the protoneutron star. According to these results the deconfinement transition is favored after substantial cooling and contraction of the protoneutron star.

• OSTI ID: 21409638
• Journal Information: Physical Review. D, Particles Fields, Vol. 81, Issue 8; Other Information: DOI: 10.1103/PhysRevD.81.085012; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON OCTETS
COLOR MODEL
CONTRACTION
COOLING
DENSITY
EQUILIBRIUM
HADRONS
NEUTRINOS
NEUTRON STARS
NONLINEAR PROBLEMS
QUARK MATTER
STRONG INTERACTIONS
SU-3 GROUPS
SUPERCONDUCTIVITY
TRAPPING
WALECKA MODEL
WEAK INTERACTIONS
BASIC INTERACTIONS
COMPOSITE MODELS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTARY PARTICLES
FERMIONS
INTERACTIONS
LEPTONS
LIE GROUPS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MATTER
MULTIPLETS
NUCLEAR MODELS
PARTICLE MODELS
PARTICLE MULTIPLETS
PHYSICAL PROPERTIES
QUARK MODEL
STARS
SU GROUPS
SYMMETRY GROUPS