In-medium T matrix for nuclear matter with three-body forces: Binding energy and single-particle properties

Journal Article · Sat Nov 15 00:00:00 EST 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.78.054003· OSTI ID:21199349

Soma, V ^[1]; Bozek, P ^[2]

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1. Institute of Nuclear Physics PAN, PL-31-342 Krakow (Poland)
2. Institute of Physics, Rzeszow University, PL-35-959 Rzeszow (Poland)

We present spectral calculations of nuclear matter properties including three-body forces. Within the in-medium T-matrix approach, implemented with the CD-Bonn and Nijmegen potentials plus the three-nucleon Urbana interaction, we compute the energy per particle in symmetric and neutron matter. The three-body forces are included via an effective density dependent two-body force in the in-medium T-matrix equations. After fine tuning the parameters of the three-body force to reproduce the phenomenological saturation point in symmetric nuclear matter, we calculate the incompressibility and the energy per particle in neutron matter. We find a soft equation of state in symmetric nuclear matter but a relatively large value of the symmetry energy. We study the the influence of the three-body forces on the single-particle properties. For symmetric matter the spectral function is broadened at all momenta and all densities, while an opposite effect is found for the case of neutrons only. Noticeable modification of the spectral functions are realized only for densities above the saturation density. The modifications of the self-energy and the effective mass are not very large and appear to be strongly suppressed above the Fermi momentum.

• OSTI ID: 21199349
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 78, Issue 5; Other Information: DOI: 10.1103/PhysRevC.78.054003; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BINDING ENERGY
DENSITY
EFFECTIVE MASS
EQUATIONS OF STATE
INTERACTIONS
MODIFICATIONS
NEUTRONS
NUCLEAR MATTER
NUCLEON-NUCLEON INTERACTIONS
PARTICLE PROPERTIES
PARTICLES
S MATRIX
SATURATION
SELF-ENERGY
SIMULATION
SPECTRAL FUNCTIONS
SYMMETRY
THREE-BODY PROBLEM
TWO-BODY PROBLEM