Published July 2010
| Version v1
Journal article
Compact stars with a quark core within the Nambu-Jona-Lasinio (NJL) model
- 1. Centro de Fisica Computacional, Department of Physics, University of Coimbra, Rua Larga, Coimbra, P-3004-516 (Portugal)
- 2. Departamento de Fisica, Instituto Tecnologico de Aeronautica, Campo Montenegro, Sao Jose dos Campos, SP, 12228-900 (Brazil)
- 3. Department of Physics, Indiana University, Swain Hall West 117, 727 East Third Street Bloomington, Indiana 47405 (United States)
Description
An ultraviolet cutoff dependent on the chemical potential as proposed by Casalbuoni et al. is used in the SU(3) Nambu-Jona-Lasinio model. The model is applied to the description of stellar quark matter and compact stars. It is shown that with a new cutoff parametrization it is possible to obtain stable hybrid stars with a quark core. A larger cutoff at finite densities leads to a partial chiral symmetry restoration of quark s at lower densities. A direct consequence is the onset of the s quark in stellar matter at lower densities and a softening of the equation of state.
Additional details
Identifiers
- DOI
- 10.1103/PhysRevC.82.015809;
- arXiv
- arXiv:1001.3169v1;
Publishing Information
- Journal Title
- Physical Review. C, Nuclear Physics
- Journal Volume
- 82
- Journal Issue
- 1
- Journal Page Range
- p. 015809-015809.9
- ISSN
- 0556-2813
- CODEN
- PRVCAN
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 41117980
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Descriptors DEI
- CHIRAL SYMMETRY; DENSITY; EQUATIONS OF STATE; QUARK MATTER; S QUARKS; SIMULATION; STARS; ULTRAVIOLET RADIATION
- Descriptors DEC
- ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; EQUATIONS; FERMIONS; MATTER; PHYSICAL PROPERTIES; QUARKS; RADIATIONS; STRANGE PARTICLES; SYMMETRY
Optional Information
- Notes
- (c) 2010 The American Physical Society