scholarly journals Variation of hadron masses in nuclear matter in the relativistic Hartree approximation

2004 ◽  
Vol 745 (1-2) ◽  
pp. 121-128 ◽  
Author(s):  
H. Shen ◽  
S. Tamenaga ◽  
H. Toki
Keyword(s):  
Nuclear Matter ◽  
Hartree Approximation ◽  
Hadron Masses

scholarly journals Nuclear matter with a Bose condensate of dibaryons in a relativistic Hartree approximation

1998 ◽  
Vol 57 (3) ◽  
pp. 1458-1463 ◽  
Author(s):  
Amand Faessler ◽  
A. J. Buchmann ◽  
M. I. Krivoruchenko
Keyword(s):  
Nuclear Matter ◽  
Bose Condensate ◽  
Hartree Approximation

THE ROLE OF SELF-COUPLINGS OF SCALAR MESONS IN NEUTRON STAR MATTER

2002 ◽  
Vol 17 (21) ◽  
pp. 1335-1344 ◽  
Author(s):  
S. S. POCHA ◽  
A. R. TAURINES ◽  
C. A. Z. VASCONCELLOS ◽  
M. B. PINTO ◽  
M. DILLIG
Keyword(s):  
Neutron Star ◽  
Nuclear Matter ◽  
Degrees Of Freedom ◽  
Scalar Meson ◽  
Dense Matter ◽  
Meson Field ◽  
Static Properties ◽  
Hartree Approximation ◽  
Scalar Meson Field

The influence of nonlinear cubic and quartic self-couplings of the scalar meson field in nuclear matter is investigated. In summing the leading tadpole corrections for the Dirac-vacuum, we compare two approaches, the modified relativistic Hartree approximation, applied to the Walecka model, and the relativistic Hartree approximation, employed to the nonlinear model, respectively. These two approaches render similar expressions for the equation of state of nuclear matter up to the fifth order in the scalar meson field. We find that, by exploring the parameter dependence of the two models, they yield similar results for the bulk static properties of nuclear matter. However, increasing the baryon density the two models start to deviate significantly, such as in the predictions for the maximal mass of a neutron star or in the role of hyperon degrees of freedom in dense matter. The results indicate that with increasing density, scalar meson self-couplings beyond the fourth order seem to play a significant role.

scholarly journals EFFECTIVE HADRON MASSES AND COUPLINGS IN NUCLEAR MATTER AND INCOMPRESSIBILITY

2001 ◽  
Vol 10 (03) ◽  
pp. 245-265 ◽  
Author(s):  
KUNITO TUCHITANI ◽  
HIROAKI KOUNO ◽  
AKIRA HASEGAWA ◽  
MASAHIRO NAKANO
Keyword(s):  
Nuclear Matter ◽  
Simple Relation ◽  
Normal Density ◽  
Effective Masses ◽  
Effective Lagrangian ◽  
Hadron Masses

The role of effective hadron masses and effective couplings in nuclear matter is studied using a generalized effective Lagrangian for σ-ω model. A simple relation among the effective masses, the effective couplings and the incompressibility K is derived. Using the relation, it is found that the effective repulsive and the effective attractive forces almost cancel each other out at the normal density. Inversely, if this cancellation is almost complete, K is 250~350 MeV.

Instability of infinite nuclear matter in the relativistic Hartree approximation

1990 ◽  
Vol 42 (1) ◽  
pp. 247-251 ◽  
Author(s):  
C. E. Price ◽  
J. R. Shepard ◽  
J. A. McNeil
Keyword(s):  
Nuclear Matter ◽  
Hartree Approximation

scholarly journals Effective Hadron Masses and Effective Interactions in Nuclear Matter

2004 ◽  
Vol 112 (5) ◽  
pp. 831-854 ◽  
Author(s):  
H. Kouno ◽  
Y. Horinouchi ◽  
K. Tuchitani
Keyword(s):  
Nuclear Matter ◽  
Effective Interactions ◽  
Hadron Masses

scholarly journals Properties of Nuclear Matter in Cutoff Field Theory and the Low-Energy Effective Lagrangian in the Hartree Approximation

1997 ◽  
Vol 97 (1) ◽  
pp. 91-101 ◽  
Author(s):  
H. Kouno ◽  
T. Mitsumori ◽  
Y. Iwasaki ◽  
K. Sakamoto ◽  
N. Noda ◽  
...  
Keyword(s):  
Field Theory ◽  
Nuclear Matter ◽  
Low Energy ◽  
Hartree Approximation ◽  
Effective Lagrangian

SATURATION PROPERTIES OF NUCLEAR MATTER IN A RELATIVISTIC MEAN FIELD MODEL CONSTRAINED BY THE QUARK DYNAMICS

2007 ◽  
Vol 16 (07n08) ◽  
pp. 2400-2406
Author(s):  
R. HUGUET ◽  
J. C. CAILLON ◽  
J. LABARSOUQUE
Keyword(s):  
Nuclear Matter ◽  
Field Model ◽  
Mean Field ◽  
Coupling Constants ◽  
Meson Mass ◽  
Mean Field Model ◽  
Relativistic Mean Field ◽  
Saturation Properties ◽  
Omega Meson ◽  
Hadron Masses

We have built an effective Walecka-type hadronic Lagrangian in which the hadron masses and the density dependence of the coupling constants are deduced from the quark dynamics using a Nambu–Jona-Lasinio model. In order to stabilize nuclear matter an eight-quark term has been included. The parameters of this Nambu–Jona-Lasinio model have been determined using the meson properties in the vacuum but also in the medium through the omega meson mass in nuclei measured by the TAPS collaboration. Realistic properties of nuclear matter have been obtained.

Sign in / Sign up

Export Citation Format

Share Document