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

Journal Article · Thu Apr 15 04:00:00 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]

---

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, Journal Name: Physical Review. D, Particles Fields Journal Issue: 8 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

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