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Advances in High Energy Physics
Volume 2009 (2009), Article ID 640919, 15 pages
Research Article

The Density-Dependent Correlations among Observables in Nuclear Matter and Hyperon-Rich Neutron Stars

1Department of Physics, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
2Department of Distributions and Communication Sciences, Osaka Gakuin University, 2-36-1 Kishibe-minami, Suita, Osaka 564-8511, Japan

Received 8 August 2008; Revised 11 December 2008; Accepted 19 February 2009

Academic Editor: Kate Scholberg

Copyright © 2009 Schun T. Uechi and Hiroshi Uechi. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The conserving mean-field approximation with nonlinear interactions of hadrons has been applied to examine properties of nuclear matter and hyperonic neutron stars. The nonlinear interactions that will produce density-dependent effective masses and coupling constants of hadrons are included in order to examine density correlations among properties of nuclear matter and neutron stars such as binding energy, incompressibility, , symmetry energy, , hyperon-onset density, and maximum masses of neutron stars. The conditions of conserving approximations in order to maintain thermodynamic consistency to an approximation are essential for the analysis of density-dependent correlations.