Modified Quark-Meson Coupling Model for Nuclear Matter

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dc.creatorJin, Xuemin
dc.creatorJennings, B. K.
dc.date1996-04-15
dc.date1996-06-13
dc.date.accessioned2026-07-07T11:15:43Z
dc.date.available2026-07-07T11:15:43Z
dc.descriptionThe quark-meson coupling model for nuclear matter, which describes nuclear matter as non-overlapping MIT bags bound by the self-consistent exchange of scalar and vector mesons, is modified by introducing medium modification of the bag constant. We model the density dependence of the bag constant in two different ways: one invokes a direct coupling of the bag constant to the scalar meson field, and the other relates the bag constant to the in-medium nucleon mass. Both models feature a decreasing bag constant with increasing density. We find that when the bag constant is significantly reduced in nuclear medium with respect to its free-space value, large canceling isoscalar Lorentz scalar and vector potentials for the nucleon in nuclear matter emerge naturally. Such potentials are comparable to those suggested by relativistic nuclear phenomenology and finite-density QCD sum rules. This suggests that the reduction of bag constant in nuclear medium may play an important role in low- and medium-energy nuclear physics.
dc.descriptionPart of the text is reordered, revised version to appear in Phys. Rev. C. 19 pages, ReVTeX, 4 figures embedded
dc.identifierhttps://arxiv.org/abs/nucl-th/9604018
dc.identifierhttp://arxiv.org/abs/nucl-th/9604018
dc.identifierPhys.Rev.C54:1427-1436,1996
dc.identifierdoi:10.1103/PhysRevC.54.1427
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/192475
dc.subjectNuclear Theory
dc.subjectHigh Energy Physics - Phenomenology
dc.titleModified Quark-Meson Coupling Model for Nuclear Matter
dc.typetext

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