scholarly journals Warm unstable asymmetric nuclear matter: Critical properties and the density dependence of the symmetry energy

2017 ◽  
Vol 95 (5) ◽  
Author(s):  
N. Alam ◽  
H. Pais ◽  
C. Providência ◽  
B. K. Agrawal
Keyword(s):  
Nuclear Matter ◽  
Density Dependence ◽  
Symmetry Energy ◽  
Critical Properties ◽  
Asymmetric Nuclear Matter

scholarly journals On Phase Transitions of Nuclear Matter in the Nambu-Jona-Lasinio Model

2011 ◽  
Vol 21 (2) ◽  
pp. 117
Author(s):  
Tran Huu Phat ◽  
Le Viet Hoa ◽  
Nguyen Van Long ◽  
Nguyen Tuan Anh ◽  
Nguyen Van Thuan
Keyword(s):  
Phase Transitions ◽  
Nuclear Matter ◽  
Density Dependence ◽  
Symmetry Energy ◽  
Nuclear Symmetry Energy ◽  
Double Bubble ◽  
Bulk Properties ◽  
Asymmetric Nuclear Matter ◽  
Njl Model ◽  
Good Agreement

Within the Cornwall - Jackiw - Tomboulis (CJT) approach a general formalism is established for the study of asymmetric nuclear matter (ANM) described by the Nambu-Jona-Lasinio (NJL) model. Restricting to the double-bubble approximation (DBA)we determine the bulk properties of ANM, in particular, the density dependence of the nuclear symmetry energy, which is in good agreement with data of recent analyses.

scholarly journals Nuclear Symmetry Energy in Chiral Model of Nuclear Matter

2012 ◽  
Vol 22 (2) ◽  
pp. 183
Author(s):  
Nguyen Tuan Anh ◽  
Tran Huu Phat ◽  
Dinh Thanh Tam
Keyword(s):  
Physical Properties ◽  
Nuclear Matter ◽  
Density Dependence ◽  
Symmetry Energy ◽  
Degrees Of Freedom ◽  
Chiral Model ◽  
Nuclear Symmetry Energy ◽  
Asymmetric Nuclear Matter ◽  
Good Agreement

The physical properties of asymmetric nuclear matter are studied in the Extended Nambou-Jona-Lasinio (ENJL) model formulated directly in the nucleon degrees of freedom. It results that the density dependence of the nuclear symmetry energy and its related quantities are basically in good agreement with data of recent analyses.

scholarly journals SKYRME FORCES WITH EXTENDED DENSITY DEPENDENCE

2004 ◽  
Vol 13 (01) ◽  
pp. 187-190 ◽  
Author(s):  
B. COCHET ◽  
K. BENNACEUR ◽  
J. MEYER ◽  
P. BONCHE ◽  
T. DUGUET
Keyword(s):  
Nuclear Matter ◽  
Density Dependence ◽  
Effective Mass ◽  
Asymmetric Nuclear Matter ◽  
Preliminary Results ◽  
Effective Force

A generalized parameterization of the Skyrme effective force is discussed. Preliminary results are presented for infinite symmetric and asymmetric nuclear matter. In particular, it is shown that an enlarged density dependence based on two terms allows to choose independently the incompressibility and the isoscalar effective mass.

scholarly journals ISOSPIN AND DENSITY DEPENDENCIES OF NUCLEAR MATTER SYMMETRY ENERGY COEFFICIENTS

2003 ◽  
Vol 12 (06) ◽  
pp. 755-770 ◽  
Author(s):  
FÁBIO L. BRAGHIN
Keyword(s):  
Nuclear Matter ◽  
Symmetry Energy ◽  
Heavy Ions ◽  
High Energy ◽  
Asymmetry Coefficient ◽  
Asymmetric Nuclear Matter ◽  
Common Features ◽  
Astrophysical Objects ◽  
Alternative Behaviors ◽  
Analytical Expressions

Symmetry energy coefficients of explicitly isospin asymmetric nuclear matter at variable densities (from 0.5ρ0 up to 2ρ0) are studied as generalized screening functions. An extended stability condition for asymmetric nuclear matter is proposed. We find the possibility of obtaining stable asymmetric nuclear matter even in some cases for which the symmetric nuclear matter limit is unstable. Skyrme-type forces are extensively used in analytical expressions of the symmetry energy coefficients derived as generalized screening functions in the four channels of the particle hole interaction producing alternative behaviors at different ρ and b (respectively, the density and the asymmetry coefficient). The spin and spin-isospin coefficients, with corrections to the usual Landau Migdal parameters, indicate the possibility of occurring instabilities with common features depending on the nuclear density and n–p asymmetry. Possible relevance for high energy heavy ions collisions and astrophysical objects is discussed.

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