scholarly journals Propagation of mesons in asymmetric nuclear matter in a density-dependent coupling model

2002 ◽  
Vol 13 (4) ◽  
pp. 501-515
Author(s):  
R. Aguirre ◽  
A.L. De Paoli
Keyword(s):  
Nuclear Matter ◽  
Coupling Model ◽  
Asymmetric Nuclear Matter ◽  
Density Dependent

scholarly journals Droplet formation in cold asymmetric nuclear matter in the quark–meson-coupling model

2000 ◽  
Vol 674 (1-2) ◽  
pp. 125-140 ◽  
Author(s):  
G. Krein ◽  
D.P. Menezes ◽  
M. Nielsen ◽  
C. Providência
Keyword(s):  
Nuclear Matter ◽  
Coupling Model ◽  
Droplet Formation ◽  
Asymmetric Nuclear Matter ◽  
Meson Coupling

δ MESON EFFECTS ON ASYMMETRIC NUCLEAR MATTER

2008 ◽  
Vol 17 (09) ◽  
pp. 1815-1824 ◽  
Author(s):  
B. LIU ◽  
M. DI TORO ◽  
V. GRECO
Keyword(s):  
Neutron Stars ◽  
Nuclear Matter ◽  
Mean Field ◽  
Coupling Scheme ◽  
Asymmetric Nuclear Matter ◽  
Density Dependent ◽  
Remarkable Effect ◽  
Relativistic Mean Field ◽  
The Stability ◽  
The Impact

The impact of a δ meson field (the scalar-isovector channel) on asymmetric nuclear matter is studied within relativistic mean-field (RMF) models with both constant and density dependent (DD) nucleon-meson couplings. The Equation of State (EOS) for asymmetric nuclear matter and the neutron star properties by the different models are compared. We find that the δ-field in the constant coupling scheme leads to a larger repulsion in dense neutron-rich matter and to a definite splitting of proton and neutron effective masses, finally influencing the stability of the neutron stars. A broader analysis of possible δ-field effects is achieved considering also density dependent nucleon-meson coupling. A remarkable effect on the relation between mass and radius for the neutron stars is seen, showing a significant reduction of the radius along with a moderate mass reduction due to the increase of the effective δ coupling in high density regions.

scholarly journals Application of density dependent parametrization models to asymmetric nuclear matter

2007 ◽  
Vol 75 (4) ◽  
Author(s):  
B. Liu ◽  
M. Di Toro ◽  
V. Greco ◽  
C. W. Shen ◽  
E. G. Zhao ◽  
...  
Keyword(s):  
Nuclear Matter ◽  
Asymmetric Nuclear Matter ◽  
Density Dependent

HYBRID DERIVATIVE SCALAR COUPLING TO STUDY PROPERTIES OF ASYMMETRIC NUCLEAR MATTER AND ITS PHASE TRANSITION TO QUARK MATTER

1996 ◽  
Vol 11 (38) ◽  
pp. 2977-2992 ◽  
Author(s):  
SASABINDU SARKAR ◽  
BINAY MALAKAR
Keyword(s):  
Phase Transition ◽  
Nuclear Matter ◽  
Thermal Energy ◽  
Quark Matter ◽  
Coupling Model ◽  
Scalar Coupling ◽  
Thermal Pressure ◽  
Asymmetric System ◽  
Asymmetric Nuclear Matter ◽  
Hybrid Derivative

We have studied properties of asymmetric nuclear matter and phase transition from this asymmetric system and also neutron matter to quark matter at zero and nonzero temperatures in the framework of recently proposed hybrid derivative scalar coupling model. We have discussed Hugenholtz-van Hove theorem and studied thermal energy, thermal pressure, symmetry energy and also incompressibility of hot dense asymmetric nuclear matter. Entropy per baryon of asymmetric nuclear matter and quark matter has been evaluated. We have also determined asymmetry dependence of density, energy per baryon of self bound asymmetric quark matter and its incompressibility.

PARAMETRIC COUPLING MODEL: RECENT ADVANCES

2010 ◽  
Vol 19 (08n10) ◽  
pp. 1463-1468
Author(s):  
G. F. MARRANGHELLO ◽  
C. PROVIDÊNCIA ◽  
A. M. S. DOS SANTOS
Keyword(s):  
Neutron Star ◽  
Nuclear Matter ◽  
Coupling Model ◽  
Heavy Ion ◽  
Small Range ◽  
Heavy Ion Collision ◽  
Asymmetric Nuclear Matter ◽  
Parametric Coupling ◽  
Free Parameters ◽  
Ion Collision

We review the properties of the parametric coupling model and analyze its results when considering neutron star observations and heavy-ion collision experiments, specially those concerning the isospin characteristics of symmetric and asymmetric nuclear matter. By the end of the analysis, we are able to constrain the free parameters to a very small range of acceptable values.

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