The stability of nuclear matter in the Nambu–Jona-Lasinio model

✍ Scribed by W. Bentz; A.W. Thomas

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 379 KB
• Volume: 696
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(01)01119-8

✦ Synopsis

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.