dorsal/arxiv
View SchemaModified Quark-Meson Coupling Model for Nuclear Matter
| Authors | Xuemin Jin, B. K. Jennings |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9604018 |
| URL | https://arxiv.org/abs/nucl-th/9604018 |
| DOI | 10.1103/PhysRevC.54.1427 |
| Journal | Phys.Rev.C54:1427-1436,1996 |
Abstract
The 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.
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"abstract": "The quark-meson coupling model for nuclear matter, which describes nuclear\nmatter as non-overlapping MIT bags bound by the self-consistent exchange of\nscalar and vector mesons, is modified by introducing medium modification of the\nbag constant. We model the density dependence of the bag constant in two\ndifferent ways: one invokes a direct coupling of the bag constant to the scalar\nmeson field, and the other relates the bag constant to the in-medium nucleon\nmass. Both models feature a decreasing bag constant with increasing density. We\nfind that when the bag constant is significantly reduced in nuclear medium with\nrespect to its free-space value, large canceling isoscalar Lorentz scalar and\nvector potentials for the nucleon in nuclear matter emerge naturally. Such\npotentials are comparable to those suggested by relativistic nuclear\nphenomenology and finite-density QCD sum rules. This suggests that the\nreduction of bag constant in nuclear medium may play an important role in low-\nand medium-energy nuclear physics.",
"arxiv_id": "nucl-th/9604018",
"authors": [
"Xuemin Jin",
"B. K. Jennings"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1103/PhysRevC.54.1427",
"journal_ref": "Phys.Rev.C54:1427-1436,1996",
"title": "Modified Quark-Meson Coupling Model for Nuclear Matter",
"url": "https://arxiv.org/abs/nucl-th/9604018"
},
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