Low density instabilities in asymmetric nuclear matter within the quark-meson coupling (QMC) model with the {delta} meson

Journal Article · Wed Apr 15 00:00:00 EDT 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.79.045805· OSTI ID:21286905

Santos, Alexandre M; Providencia, Constanca; Panda, Prafulla K ^[1]

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1. Centro de Fisica Computacional, Department of Physics, University of Coimbra, P-3004-516 Coimbra (Portugal)

In the present work we include the isovector-scalar {delta} meson in the quark-meson coupling (QMC) model and study the properties of asymmetric nuclear within QMC without and with the {delta} meson. Recent constraints set by isospin diffusion on the slope parameter of the nuclear symmetry energy at saturation density are used to adjust the model parameters. The thermodynamical spinodal surfaces are obtained and the instability region at subsaturation densities within QMC and QMC{delta} models are compared with mean-field relativistic models. The distillation effect in the QMC model is discussed.

• OSTI ID: 21286905
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 79, Issue 4; Other Information: DOI: 10.1103/PhysRevC.79.045805; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
COUPLING
DENSITY
DIFFUSION
DISTILLATION
INSTABILITY
ISOSPIN
ISOVECTORS
MEAN-FIELD THEORY
MESONS
NUCLEAR MATTER
QUARKS
RELATIVISTIC RANGE
SATURATION
SIMULATION
SURFACES
SYMMETRY