Nuclear phenomena derived from quark-gluon strings

Journal Article · Sun May 01 04:00:00 EDT 2005 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.71.055203· OSTI ID:20698696

Bohr, Henrik ^[1]; Providencia, Constanca; Providencia, Joao da ^[2]

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1. Department of Physics, B. 307, Danish Technical University, DK-2800 Lyngby (Denmark)
2. Departamento de Fisica, Universidade de Coimbra, P-3000 Coimbra (Portugal)

We propose a quantum chromodynamics (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 ingredients of 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 two-particle strings, which are natural in a QCD framework. Moreover, the model is able to reconcile qualitatively such aspects of hadronic physics as saturation density and binding energy of nuclear matter, surface density of finite nuclei, mass of the scalar particle, medium range NN interaction, and f{sub {pi}} value in vacuum.

• OSTI ID: 20698696
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 5 Vol. 71; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BAG MODEL
BARYONS
BINDING ENERGY
CHIRAL SYMMETRY
CHIRALITY
DENSITY
GAUGE INVARIANCE
GLUONS
INSTANTONS
LAGRANGIAN FIELD THEORY
LAGRANGIAN FUNCTION
NUCLEAR MATTER
PERTURBATION THEORY
POTENTIALS
QUANTUM CHROMODYNAMICS
QUARKS
SPARTICLES
STRONG-COUPLING MODEL
THREE-BODY PROBLEM
UNIFIED MODEL