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

scholarly journals Nuclear matter with a Bose condensate of dibaryons in relativistic mean-field theory

1997 ◽  
Vol 391 (3-4) ◽  
pp. 255-260 ◽  
Author(s):  
Amand Faessler ◽  
A.J. Buchmann ◽  
M.I. Krivoruchenko ◽  
B.V. Martemyanov
Keyword(s):  
Field Theory ◽  
Nuclear Matter ◽  
Bose Condensate ◽  
Mean Field Theory ◽  
Mean Field ◽  
Relativistic Mean Field Theory ◽  
Relativistic Mean Field

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.

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 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

TEMPERATURE DEPENDENCE OF THE EFFECTIVE INTERACTION IN NUCLEAR MATTER

1987 ◽  
Vol 48 (C2) ◽  
pp. C2-301-C2-304
Author(s):  
M. BALDO ◽  
G. GIANSIRACUSA ◽  
U. LOMBARDO
Keyword(s):  
Nuclear Matter ◽  
Temperature Dependence ◽  
Effective Interaction
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