Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2008-07-21
Phys.Rev.C73:035208,2006
Physics
Nuclear Physics
Nuclear Theory
14 pages, 5 figures
Scientific paper
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 V18 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.
Li Zhong-Hua
Lombardo Umberto
Lu G. C.
Schulze Hans-Josef
Zuo Wei
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