Temperature dependence of single-particle properties in nuclear matter

• 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
• ISSN: 0556-2813; 1089-490X
• DOI: 10.1103/PhysRevC.73.035208

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.