The Stability of Nuclear Matter in the Nambu-Jona-Lasinio Model

Details The Stability of Nuclear Matter in the Nambu-Jona-Lasinio Model The Stability of Nuclear Matter in the Nambu-Jona-Lasinio Model

2001-05-08

arxiv.org/abs/nucl-th/0105022v1

Nucl.Phys.A696:138-172,2001

Physics

Nuclear Physics

Nuclear Theory

52 pages, 15 figures

Scientific paper

10.1016/S0375-9474(01)01119-8

Using the Nambu-Jona-Lasinio model to describe the nucleon as a quark-diquark state, we discuss the stability of nuclear matter in a hybrid model for the ground state at finite nucleon density. It is shown that a simple extension of the model to simulate the effects of confinement leads to a scalar polarizability of the nucleon. This, in turn, leads to a less attractive effective interaction between the nucleons, helping to achieve saturation of the nuclear matter ground state. It is also pointed out that that the same effect naturally leads to a suppression of ``Z-graph'' contributions with increasing scalar potential.

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