Nuclear phenomena derived from quark-gluon strings

Henrik Bohr, Constanca Providencia, Joao da Providencia

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Abstract

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(pi) value in vacuum.
Original languageEnglish
JournalPhysical Review C
Volume71
Issue number5
Pages (from-to)055203
ISSN2469-9985
DOIs
Publication statusPublished - 2005

Bibliographical note

Copyright 2005 American Physical Society

Cite this

Bohr, H., Providencia, C., & Providencia, J. D. (2005). Nuclear phenomena derived from quark-gluon strings. Physical Review C, 71(5), 055203. https://doi.org/10.1103/PhysRevC.71.055203
Bohr, Henrik ; Providencia, Constanca ; Providencia, Joao da. / Nuclear phenomena derived from quark-gluon strings. In: Physical Review C. 2005 ; Vol. 71, No. 5. pp. 055203.
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abstract = "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(pi) value in vacuum.",
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Bohr, H, Providencia, C & Providencia, JD 2005, 'Nuclear phenomena derived from quark-gluon strings', Physical Review C, vol. 71, no. 5, pp. 055203. https://doi.org/10.1103/PhysRevC.71.055203

Nuclear phenomena derived from quark-gluon strings. / Bohr, Henrik; Providencia, Constanca; Providencia, Joao da.

In: Physical Review C, Vol. 71, No. 5, 2005, p. 055203.

Research output: Contribution to journalJournal articleResearchpeer-review

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AU - Bohr, Henrik

AU - Providencia, Constanca

AU - Providencia, Joao da

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N2 - 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(pi) value in vacuum.

AB - 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(pi) value in vacuum.

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