Nuclear matter calculation with a super soft core potential including isobar degrees of freedom

1981 ◽  
Vol 59 (1) ◽  
pp. 69-81 ◽  
Author(s):  
M. Dey ◽  
B. C. Samanta ◽  
J. Dey
Keyword(s):  
Nuclear Matter ◽  
Degrees Of Freedom ◽  
Effective Interaction ◽  
Nucleon Nucleon ◽  
Soft Core ◽  
Momentum Dependence ◽  
Nucleon Potential ◽  
Core Potential ◽  
Soft Core Potential ◽  
Energy Saturation

A complete nuclear matter calculation in lowest order Brueckner theory is done for a super soft core nucleon–nucleon potential due to de Tourreil, Rouben, and Sprung and the effect of including isobar degrees of freedom on binding energy, saturation, and half-shell G-matrices is considered in the frame work of the coupled channel formalism. The singlet and triplet S-state effective interaction is derived and its density and momentum dependence is studied. Comparison is made with the results obtained from the Reid soft core potential.

Soft-Core Model in Nuclear Matter Calculations

1969 ◽  
Vol 24 (7) ◽  
pp. 1037-1039
Author(s):  
R Kar ◽  
M Roy
Keyword(s):  
Binding Energy ◽  
Nuclear Matter ◽  
Soft Core ◽  
Core Model ◽  
Equilibrium Density ◽  
Core Potential ◽  
Thomas Fermi ◽  
Soft Core Potential

Abstract Using a Thomas-Fermi method developed by KUMAR, LE COUTEUR and ROY 1 , it is shown here that the two-body soft-core potential suggested by KÖHLER and WAGMARE 2 does not give rise to correct binding energy and equilibrium density in nuclear matter calculations.

Soft-core potential model for nucleon-nucleon scattering. II

1969 ◽  
Vol 139 (3) ◽  
pp. 605-624 ◽  
Author(s):  
Donald W.L. Sprung ◽  
M.K. Srivastava
Keyword(s):  
Potential Model ◽  
Nucleon Nucleon ◽  
Soft Core ◽  
Nucleon Scattering ◽  
Core Potential ◽  
Soft Core Potential

Quark degrees of freedom and nuclear matter saturation

2019 ◽  
Vol 34 (39) ◽  
pp. 1950322
Author(s):  
Marcello Baldo ◽  
Zahra Asadi Aghbolaghi ◽  
Isaac Vidaña ◽  
Mohsen Bigdeli
Keyword(s):  
Nuclear Matter ◽  
Degrees Of Freedom ◽  
Nucleon Nucleon ◽  
Meson Exchange ◽  
Nucleon Interaction ◽  
S Wave ◽  
Nucleon Potential ◽  
Quark Interaction ◽  
Exchange Processes ◽  
Nucleon Nucleon Interaction

It has been found in previous works [M. Baldo and K. Fukukawa, Phys. Rev. Lett. 113, 241501 (2014); K. Fukukawa, M. Baldo, G. F. Burgio, L. Lo Monaco and H.-J. Schulze, Phys. Rev. 92, 065802 (2015)] that the nucleon–nucleon potential of [Y. Fujiwara, M. Kohno, C. Nakamoto and Y. Suzuki Phys. Rev. C 64, 054001 (2001); Y. Fujiwara et al., Phys. Rev. C 65, 014002 (2001)] gives an accurate saturation point in symmetric nuclear matter once the three hole-line contributions are included in the Brueckner–Bethe–Goldstone expansion without the addition of three-body forces in the nuclear Hamiltonian. The potential is based on a quark model of nucleons and on the quark–quark interaction together with quark exchange processes. These features introduce an intrinsic nonlocality of the nucleon–nucleon interaction. In order to clarify the role of the quark degrees of freedom and of the nonlocality in the saturation, we perform a comparative study of this potential and the traditional meson exchange models, exemplified in the CD-Bonn potential. We find that at the Brueckner–Hartree–Fock approximation, which corresponds to the two hole-line level of approximation, the dominant modification of the nucleon–nucleon interaction with respect to CD-Bonn is incorporated in the s-wave channels, where the quark degrees of freedom should be more relevant, in particular for the short range quark exchange processes. However, when the three hole-line contribution is included, we find that the higher partial waves play a relevant role, mainly in the term that describes the effect of the medium on the off-shell propagation of the nucleon.

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