In-medium chiral effective Lagrangian description of nuclear matter and Walecka-type mean-field models

2003 ◽  
Vol 61 (1) ◽  
pp. 41-46
Author(s):  
X.-B Zhang
Keyword(s):  
Nuclear Matter ◽  
Mean Field ◽  
Lagrangian Description ◽  
Mean Field Models ◽  
Effective Lagrangian

scholarly journals Relativistic mean-field models and nuclear matter constraints

2013 ◽  
Author(s):  
M. Dutra ◽  
O. Lourenço ◽  
B. V. Carlson ◽  
A. Delfino ◽  
D. P. Menezes ◽  
...  
Keyword(s):  
Nuclear Matter ◽  
Mean Field ◽  
Relativistic Mean Field ◽  
Mean Field Models

scholarly journals Chiral effective lagrangian description of bulk nuclear matter

1995 ◽  
Vol 357 (3) ◽  
pp. 431-434 ◽  
Author(s):  
Graciela Gelmini ◽  
Bruce Ritzi
Keyword(s):  
Nuclear Matter ◽  
Lagrangian Description ◽  
Effective Lagrangian

NEUTRON STAR MASS CORRELATION WITH SOUND VELOCITY AND INCOMPRESSIBILITY AT THE STAR CENTER IN THE POLYTROPIC APPROXIMATION

2010 ◽  
Vol 19 (08n10) ◽  
pp. 1575-1582
Author(s):  
L. FERRARI ◽  
P. C. R. ROSSI ◽  
M. MALHEIRO
Keyword(s):  
Neutron Star ◽  
Equation Of State ◽  
Nuclear Matter ◽  
Sound Velocity ◽  
Mean Field ◽  
Star Mass ◽  
Mean Field Models ◽  
Neutron Star Mass ◽  
Analytic Expressions ◽  
Walecka Model

In this paper we use a polytropic approximation to the equation of state for the interior of neutrons stars, described by relativistic hadronic mean field models. In this approximation, it is possible to obtain analytic expressions for the sound velocity and the incompressibility at the star center. We found a correlation between these quantities and the star mass. Using two well-known parametrizations of the nonlinear Walecka model for nuclear matter composed only of protons, neutrons and electron in β equilibrium, we obtain for a star mass of 1.43 M⊙ a central incompressibility Kc = (3000±100), around ten times the nuclear matter incompressibility, and a central sound velocity (v/c)2 ~ 0.3.

Nuclear saturation energy in effective chiral model within Fermi liquid theory approach

2020 ◽  
Vol 98 (12) ◽  
pp. 1133-1143
Author(s):  
Kausik Pal
Keyword(s):  
Nuclear Matter ◽  
Fermi Liquid ◽  
Chemical Potential ◽  
Mean Field ◽  
Chiral Model ◽  
Theory Approach ◽  
Perturbative Calculation ◽  
Effective Lagrangian ◽  
Dense Nuclear Matter ◽  
First Sound

We calculate the relativistic Fermi liquid parameters (RFLPs) for the description of the nuclear saturation energy using a chiral effective Lagrangian. Analytical expressions of Fermi liquid parameters (FLPs) are presented both for the direct and exchange contributions by retaining the meson masses. We present a comparative study of perturbative calculation with mean field results. The FLPs, so determined, are then used to calculate the chemical potential, energy densities, and binding energy for dense nuclear matter interacting via the exchange of σ, ω, and π mesons. In addition, we also estimate bulk quantities like incompressibility and first sound velocity in terms of RFLPs for dense nuclear matter.

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