Warm stellar matter within the quark-meson-coupling model

Journal Article · Fri Oct 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.045801· OSTI ID:21419646

Panda, P K; Providencia, C ^[1]; Menezes, D P ^[2]

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1. Centro de Fisica Computacional, Department of Physics, University of Coimbra, P-3004-516 Coimbra (Portugal)
2. Departamento de Fisica, CFM, Universidade Federal de Santa Catarina, Florianopolis - SC, CP. 476, CEP 88.040 - 900 (Brazil)

In the present article, we investigate stellar matter obtained within the quark-meson-coupling (QMC) model for fixed temperature and with the entropy of the order of 1 or 2 Boltzmann units per baryon for neutrino-free matter and matter with trapped neutrinos. A new prescription for the calculation of the baryon effective masses in terms of the free energy is used. Comparing the results of the present work with those obtained from the nonlinear Walecka model, smaller strangeness and neutrino fractions are predicted within QMC. As a consequence, QMC has a smaller window of metastability for conversion into a low-mass blackhole during cooling.

• OSTI ID: 21419646
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 82, Issue 4; Other Information: DOI: 10.1103/PhysRevC.82.045801; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
CONVERSION
COUPLING
ENTROPY
FREE ENERGY
MASS
MESONS
NEUTRINOS
NONLINEAR PROBLEMS
QUARK MATTER
QUARKS
SIMULATION
STRANGENESS
TRAPPING
WALECKA MODEL
BOSONS
ELEMENTARY PARTICLES
ENERGY
FERMIONS
HADRONS
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MATTER
NUCLEAR MODELS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES