Temperature dependence of single-particle properties in nuclear matter

The single-nucleon potential in hot nuclear matter is investigated in the framework of the Brueckner theory by adopting the realistic Argonne V{sub 18} or Nijmegen 93 two-body nucleon-nucleon interaction supplemented by a microscopic three-body force. The rearrangement contribution to the single-par...

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Bibliographic Details
Published in:Physical review. C, Nuclear physics Nuclear physics, 2006-03, Vol.73 (3), Article 035208
Main Authors: Zuo, W., Li, Z. H., Lombardo, U., Lu, G. C., Schulze, H.-J.
Format: Article
Language:English
Subjects:
CORRELATIONS
DENSITY
EFFECTIVE MASS
FERMI LEVEL
GROUND STATES
NUCLEAR MATTER
NUCLEAR PHYSICS AND RADIATION PHYSICS
NUCLEON-NUCLEON INTERACTIONS
NUCLEONS
PARTICLE PROPERTIES
POTENTIALS
TEMPERATURE DEPENDENCE
THREE-BODY PROBLEM
TWO-BODY PROBLEM
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Summary:The single-nucleon potential in hot nuclear matter is investigated in the framework of the Brueckner theory by adopting the realistic Argonne V{sub 18} or Nijmegen 93 two-body nucleon-nucleon interaction supplemented by a microscopic three-body force. The rearrangement contribution to the single-particle potential induced by the ground state correlations is calculated in terms of the hole-line expansion of the mass operator and provides a significant repulsive contribution in the low-momentum region around and below the Fermi surface. Increasing temperature leads to a reduction of the effect, while increasing density makes it become stronger. The three-body force suppresses somewhat the ground state correlations due to its strong short-range repulsion, increasing with density. Inclusion of the three-body force contribution results in a quite different temperature dependence of the single-particle potential at high enough densities as compared to that adopting the pure two-body force. The effects of three-body force and ground state correlations on the nucleon effective mass are also discussed.
ISSN:0556-2813
1089-490X
DOI:10.1103/PhysRevC.73.035208