Nuclear phenomena derived from quark-gluon strings

Details Nuclear phenomena derived from quark-gluon strings Nuclear phenomena derived from quark-gluon strings

2004-09-15

arxiv.org/abs/nucl-th/0409030v1

Phys.Rev. C71 (2005) 055203

Physics

Nuclear Physics

Nuclear Theory

17 pages, 4 figures, 2 tables

Scientific paper

10.1103/PhysRevC.71.055203

We propose a QCD based many-body model for the nucleus where the strong coupling regime is controlled by a three body string force and the weak coupling regime is dominated by a pairing force. This model operates effectively with a quark-gluon Lagrangian containing a pairing force from instantons and a baryonic string term which contains a confining potential. The unified model for weak and strong coupling regimes, is, however, only consistent at the border of perturbative QCD. The baryonic string force is necessary, as a {stability and} compressibility analysis shows, for the occurrence of the phases of nuclear matter. The model exhibits a quark deconfinement transition and chiral restoration which are suggested by QCD and give qualitatively correct numerics. The effective model is shown to be isomorphic to the Nambu-Jona-Lasinio model and exhibits the correct chirality provided that the chiral fields are identified with the 2-particle strings, which are natural in a QCD framework

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