scholarly journals Hyperons in a relativistic mean-field approach to asymmetric nuclear matter

2004 ◽  
Vol 70 (5) ◽  
Author(s):  
J. Kotulič Bunta ◽  
Štefan Gmuca
Keyword(s):  
Nuclear Matter ◽  
Mean Field ◽  
Asymmetric Nuclear Matter ◽  
Field Approach ◽  
Relativistic Mean Field

EFFECTS OF THE ω MESON SELF COUPLING ON THE THERMAL PROPERTIES OF ASYMMETRIC NUCLEAR MATTER

2009 ◽  
Vol 24 (11n13) ◽  
pp. 1067-1070
Author(s):  
S. WIBOWO ◽  
A. SULAKSONO
Keyword(s):  
Phase Transition ◽  
Thermal Properties ◽  
Nuclear Matter ◽  
Gas Phase ◽  
Mean Field ◽  
Binodal Curve ◽  
Asymmetric Nuclear Matter ◽  
Relativistic Mean Field ◽  
Chemical Instabilities ◽  
Rmf Model

Effects of the ω meson self coupling (OMSC) on the thermal properties of asymmetric nuclear matter (ANM) are studied within the framework of relativistic mean field (RMF) model that includes contributions of all possible mixed interactions among meson fields involved up to quartic order. In particular, we study the mechanical and chemical instabilities (spinodal), as well as the liquid-gas phase transition (binodal) at finite temperature. It is found that the onset of spinodal instabilities and the binodal curve are only marginally affected by variation of the OMSC parameter, whereas the binodal curve shows a strong correlation to the symmetry energy. Comparison with other ERMF parameter sets is also performed.

ISOVECTOR COMPONENTS OF LIGHT SCALAR MESON AND NUCLEAR MATTER PROPERTIES

2007 ◽  
Vol 16 (09) ◽  
pp. 2867-2871 ◽  
Author(s):  
C. A. Z. VASCONCELLOS ◽  
E. LÜTZ ◽  
M. RAZEIRA ◽  
B. E. J. BODMANN ◽  
M. DILLIG ◽  
...  
Keyword(s):  
Nuclear Matter ◽  
Scalar Meson ◽  
Mean Field ◽  
Symmetry Transformation ◽  
Hadronic Matter ◽  
Meson Field ◽  
Field Approach ◽  
Relativistic Mean Field ◽  
Light Scalar ◽  
Scalar Meson Field

We have predicted (contribution to this issue) an isovector component of the light scalar meson sector by using the chiral symmetry transformation formalism. On the basis of this result, we study dense hadronic matter in a generalized relativistic mean field approach with σ, ω and ρ mesons as well as nonlinear self-couplings of the I = 1 component of a light scalar meson field and compare its predictions for neutron star properties with results from different models for nuclear matter found in the literature.

scholarly journals Spinodal instabilities in nuclear matter in a stochastic relativistic mean-field approach

2009 ◽  
Vol 80 (3) ◽  
Author(s):  
S. Ayik ◽  
O. Yilmaz ◽  
N. Er ◽  
A. Gokalp ◽  
P. Ring
Keyword(s):  
Nuclear Matter ◽  
Mean Field ◽  
Field Approach ◽  
Relativistic Mean Field

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 Effects of NN potentials on p Nuclides in the A ∼100–120 region

2016 ◽  
Vol 25 (02) ◽  
pp. 1650015 ◽  
Author(s):  
C. Lahiri ◽  
S. K. Biswal ◽  
S. K. Patra
Keyword(s):  
Experimental Data ◽  
Nuclear Matter ◽  
Mean Field ◽  
Reaction Rates ◽  
Mass Region ◽  
Low Energy ◽  
Field Approach ◽  
Relativistic Mean Field ◽  
Energy Proton ◽  
Energy Formula

Microscopic optical potentials for low-energy proton reactions have been obtained by folding density dependent M3Y (DDM3Y) interaction derived from nuclear matter calculation with densities from mean field approach to study astrophysically important proton rich nuclei in mass 100–120 region. We compare [Formula: see text] factors for low-energy [Formula: see text] reactions with available experimental data and further calculate astrophysical reaction rates for [Formula: see text] and [Formula: see text] reactions. Again, we choose some nonlinear R3Y (NR3Y) interactions from relativistic mean field (RMF) calculation and folded them with corresponding RMF densities to reproduce experimental [Formula: see text]-factor values in this mass region. Finally, the effect of nonlinearity on our result is discussed.

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